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• Uploading to another domain gives HTTP code 405

  - by dragon112

  I'm trying to upload a file (which can be quite large) from the website of one server to the backend of another server using plupload. Lets say: domain 1 = http://www.websitedomain.com/uploadform domain 2 = http://www.backenddomain.com/uploadhandler Trying to upload i send the following: OPTIONS /main/uploadnetwork.php HTTP/1.1 Host: backenddomain.com Connection: keep-alive Access-Control-Request-Method: POST Origin: http://www.websitedomain.com User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.4 (KHTML, like Gecko) Chrome/22.0.1229.79 Safari/537.4 Access-Control-Request-Headers: origin, content-type Accept: */* Referer: http://www.websitedomain.com/uploadform Accept-Encoding: gzip,deflate,sdch Accept-Language: nl-NL,nl;q=0.8,en-US;q=0.6,en;q=0.4 Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.3 DNT: 1 But when I try to start the upload the server returns the following: HTTP/1.1 405 Method Not Allowed Allow: GET, HEAD, OPTIONS, TRACE Content-Type: text/html Server: Microsoft-IIS/7.5 X-Powered-By: ASP.NET X-Powered-By-Plesk: PleskWin Date: Mon, 01 Oct 2012 12:41:57 GMT Content-Length: 999 After doing some research I found out that a browser does this to check if the server will accept the intended message. It looks like my server doesn't feel like accepting a simple POST call even tho i use post all the time. The Google Chrome console gives the following error: XMLHttpRequest cannot load http://www.backenddomain.com/uploadhandler. Origin http://www.websitedomain.com is not allowed by Access-Control-Allow-Origin. Does anyone know how to stop the browser from checking or how i can tell my server to just accept the POST?

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• IIS returning plain Forbidden response. No HTTP code

  - by Alex Pineda

  I'm running a ServiceStack application on IIS. My regular services work fine and have not had any problems with permissions. My new project involves providing generated pdfs. I gave IIS_IUSRS read/write permissions to the Temp directory under my app directory. I also allow non SSL connections to this directory. When I browse to the file which ServiceStack is supposed to automatically serve up (eg. http://ryu.com/Temp/201310171723337631.pdf ) I get this: Forbidden Request.HttpMethod: GET Request.PathInfo: Request.QueryString: Request.RawUrl: /ryu/Temp/201310171723337631.pdf App.IsIntegratedPipeline: True App.WebHostPhysicalPath: C:\inetpub\ryu App.WebHostRootFileNames: [global.asax,global.asax.cs,web.config,bin,temp] Now this doesn't look like a ServiceStack error message, more like IIS, but I'm not certain as to how to get to the bottom of this. Authorization settings are Allow All.

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• Error code 2503 - Cannot install software on Windows 7 (64Bit)

  - by SixfootJames

  A short while ago, I had my hard drive die on me and at the same time my 1Tb backup drive! I took it back to the guy I bought the PC from and although the backup drive could not be recovered, he managed to get my machine working again by making a minor change in the BIOS which then got it out of that continuous loop it found itself in after multiple BSOD episodes. Everything seems to be working fine but yesterday when I tried to save something from Google Chrome, I got and insufficient permission problem and when I try to install software, I get an error of 2503. I have already followed the suggestions here but none of this worked for me. Any suggestions would be appreciated. EDIT: This started happening after I tried running a number of tests to get the machine working, including a previous restore point.

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• Java Error Code 2753 Regutils.dll

  - by Adam

  Hello, I'm trying to install Java's JRE, however I'm running into problems. Recently the JRE was uninstalled on this computer, and when I try to reinstall I get this error 2753. I've looked online and the best page I've found to try and help is this one: http://forums.majorgeeks.com/showthread.php?t=182720 Which says to uninstall Java using Revo or Windows Cleanup. However nether program says I have Java installed. From what I've read this is a uninstall problem when Java is not really uninstalled. How do I make sure Java is completely uninstalled? Do you have any other suggestions for me to try?

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• Apache 406 error with JPEGCam

  - by BenM

  We have recently migrated our website to a new server, and JPEGCam is now reporting a 406 (Not Acceptable) error when trying to upload the image from the SWF to the server. I know that it isn't supported any more by the developer, but I wondered if anyone has encountered this problem before. I suspected the issue was with the Mod_Security module in Apache (i.e. not whitelisting Shockwave Flash), but the server admins have also drawn a blank. The request is being sent as a POST method, and returns a 406 error, but according to the Apache logs, it is returning a 404 error. I wondered if anyone has encountered this problem before, or knows of a 'simple' fix. Everything was working on our Xampp flavour dev server, so I am 100% certain this is an Apache issue. Also, when trying to access the requested page directly in the web browser, everything gets served up without a problem...

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• Command line tool to format c++ code on ubuntu

  - by michael

  Hi, Is there any command line tool which can be used to beautify c++ file on ubuntu? If yes, can you please suggest one? Thank you.

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• Reuse security code between WCF and MVC.NET

  - by mrjoltcola

  First the background: I jumped into MVC.NET from the Java MVC world, so my implementation below is possibly cheating, I don't know. I avoided fooling with a custom membership provider and I just implemented the base code needed to authenticate and load roles in my LogOn action. Typically I just need to check roles programatically, and have no use for all of the other membership features, so I didn't originally think I needed a full Membership provider. I have a successful WCF project with a custom authentication and authorization layer that I did at least write per the proper API. I implemented it with custom IPrincipal, UserNamePasswordValidator and IAuthorizationPolicy classes to load from an Oracle database. In my WCF services, I use declarative security: [PrincipalPermission(SecurityAction.Demand, Role="ADMIN")]. The question (on the ASP.NET/MCV.NET side): All my reading indicates I should implement a custom Membership/Roles provider, and use [Authorize(Roles="ADMIN")] on my controller actions. At this point, I don't have a true Membership provider, but I'm using the same User class that implements the IPrincipal interface that works with the WCF security. I plan to share common code between the WCF and ASP.NET modules. So my LogOn action is not using the FormsService (and I assume this is bad). I had commented it out, and just used my "UserService" to access the Oracle db. Note my "TODO" comment below. public ActionResult LogOn(LogOnModel model, string returnUrl) { log.Info("Login attempt by " + model.UserName); if (ModelState.IsValid) { User user = userService.findByUserName(model.UserName); // Commented original MemberShipService code, this is probably bad // if (MembershipService.ValidateUser(model.UserName, model.Password)) if (user != null && user.Authenticate(model.Password) == true) { log.Info("Login success by " + model.UserName); FormsService.SignIn(model.UserName, model.RememberMe); // TODO: Override with Custom identity / roles? user.AddRoles(userService.listRolesByUser(user)); // pull in roles from db if (!String.IsNullOrEmpty(returnUrl)) return Redirect(returnUrl); else return RedirectToAction("Index", "Home"); } else { log.Info("Login failure by " + model.UserName); ModelState.AddModelError("", "The user name or password provided is incorrect."); } } // If we got this far, something failed, redisplay form return View(model); } So can I make the above work? Can I stick the IPrincipal (User) into the CurrentContext or HttpContext? Can I integrate the custom IPrincipal I've already created without writing a full Membership/Roles Provider? I currently stick the User object into the session and access it from all MVC.NET controllers with "CurrentUser" property which grabs it from the session on demand. But this doesn't work with the [Authorize] attribute; I assume that is because it knows nothing about my custom Principal in the session, and is instead using whatever FormsService.SignIn() produces. I also found that session timeouts screw up the login redirect, the user doesn't get forwarded, instead we get a null exception accessing User from the session, and I assume it is related to my "skipping steps" to get a quick implementation. Thanks.

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• How optimize code with introspection + heavy alloc on iPhone

  - by mamcx

  I have a problem. I try to display a UITable that could have 2000-20000 records (typicall numbers.) I have a SQLite database similar to the Apple contacts application. I do all the tricks I know to get a smoth scroll, but I have a problem. I load the data in 50 recods blocks. Then, when the user scroll, request next 50 until finish the list. However, load that 50 records cause a notable "pause" in loading and scrolling. Everything else works fine. I cache the data, have opaque cells, draw it by code, etc... I swap the code loading the same data in dicts and have a performance boost but wonder if I could keep my object oriented aproach and improve the actual code. This is the code I think have the performance problem: -(NSArray *) loadAndFill: (NSString *)sql theClass: (Class)cls { [self openDb]; NSMutableArray *list = [NSMutableArray array]; NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init]; DbObject *ds; Class myClass = NSClassFromString([DbObject getTableName:cls]); FMResultSet *rs = [self load:sql]; while ([rs next]) { ds = [[myClass alloc] init]; NSDictionary *props = [ds properties]; NSString *fieldType = nil; id fieldValue; for (NSString *fieldName in [props allKeys]) { fieldType = [props objectForKey: fieldName]; fieldValue = [self ValueForField:rs Name:fieldName Type:fieldType]; [ds setValue:fieldValue forKey:fieldName]; } [list addObject :ds]; [ds release]; } [rs close]; [pool drain]; return list; } And I think the main culprit is: -(id) ValueForField: (FMResultSet *)rs Name:(NSString *)fieldName Type:(NSString *)fieldType { id fieldValue = nil; if ([fieldType isEqualToString:@"i"] || // int [fieldType isEqualToString:@"I"] || // unsigned int [fieldType isEqualToString:@"s"] || // short [fieldType isEqualToString:@"S"] || // unsigned short [fieldType isEqualToString:@"f"] || // float [fieldType isEqualToString:@"d"] ) // double { fieldValue = [NSNumber numberWithInt: [rs longForColumn:fieldName]]; } else if ([fieldType isEqualToString:@"B"]) // bool or _Bool { fieldValue = [NSNumber numberWithBool: [rs boolForColumn:fieldName]]; } else if ([fieldType isEqualToString:@"l"] || // long [fieldType isEqualToString:@"L"] || // usigned long [fieldType isEqualToString:@"q"] || // long long [fieldType isEqualToString:@"Q"] ) // unsigned long long { fieldValue = [NSNumber numberWithLong: [rs longForColumn:fieldName]]; } else if ([fieldType isEqualToString:@"c"] || // char [fieldType isEqualToString:@"C"] ) // unsigned char { fieldValue = [rs stringForColumn:fieldName]; //Is really a boolean? if ([fieldValue isEqualToString:@"0"] || [fieldValue isEqualToString:@"1"]) { fieldValue = [NSNumber numberWithInt: [fieldValue intValue]]; } } else if ([fieldType hasPrefix:@"@"] ) // Object { NSString *className = [fieldType substringWithRange:NSMakeRange(2, [fieldType length]-3)]; if ([className isEqualToString:@"NSString"]) { fieldValue = [rs stringForColumn:fieldName]; } else if ([className isEqualToString:@"NSDate"]) { NSDateFormatter* dateFormatter = [[NSDateFormatter alloc] init]; [dateFormatter setDateFormat:@"yyyy-MM-dd'T'HH:mm:ss"]; NSString *theDate = [rs stringForColumn:fieldName]; if (theDate) { fieldValue = [dateFormatter dateFromString: theDate]; } else { fieldValue = nil; } [dateFormatter release]; } else if ([className isEqualToString:@"NSInteger"]) { fieldValue = [NSNumber numberWithInt: [rs intForColumn :fieldName]]; } else if ([className isEqualToString:@"NSDecimalNumber"]) { fieldValue = [rs stringForColumn :fieldName]; if (fieldValue) { fieldValue = [NSDecimalNumber decimalNumberWithString:[rs stringForColumn :fieldName]]; } } else if ([className isEqualToString:@"NSNumber"]) { fieldValue = [NSNumber numberWithDouble: [rs doubleForColumn:fieldName]]; } else { //Is a relationship one-to-one? if (![fieldType hasPrefix:@"NS"]) { id rel = class_createInstance(NSClassFromString(className), sizeof(unsigned)); Class theClass = [rel class]; if ([rel isKindOfClass:[DbObject class]]) { fieldValue = [rel init]; //Load the record... NSInteger Id = [rs intForColumn:[theClass relationName]]; if (Id>0) { [fieldValue release]; Db *db = [Db currentDb]; fieldValue = [db loadById: theClass theId:Id]; } } } else { NSString *error = [NSString stringWithFormat:@"Err Can't get value for field %@ of type %@", fieldName, fieldType]; NSLog(error); NSException *e = [NSException exceptionWithName:@"DBError" reason:error userInfo:nil]; @throw e; } } } return fieldValue; }

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• Writing more efficient xquery code (avoiding redundant iteration)

  - by Coquelicot

  Here's a simplified version of a problem I'm working on: I have a bunch of xml data that encodes information about people. Each person is uniquely identified by an 'id' attribute, but they may go by many names. For example, in one document, I might find <person id=1>Paul Mcartney</person> <person id=2>Ringo Starr</person> And in another I might find: <person id=1>Sir Paul McCartney</person> <person id=2>Richard Starkey</person> I want to use xquery to produce a new document that lists every name associated with a given id. i.e.: <person id=1> <name>Paul McCartney</name> <name>Sir Paul McCartney</name> <name>James Paul McCartney</name> </person> <person id=2> ... </person> The way I'm doing this now in xquery is something like this (pseudocode-esque): let $ids := distinct-terms( [all the id attributes on people] ) for $id in $ids return <person id={$id}> { for $unique-name in distinct-values ( for $name in ( [all names] ) where $name/@id=$id return $name ) return <name>{$unique-name}</name> } </person> The problem is that this is really slow. I imagine the bottleneck is the innermost loop, which executes once for every id (of which there are about 1200). I'm dealing with a fair bit of data (300 MB, spread over about 800 xml files), so even a single execution of the query in the inner loop takes about 12 seconds, which means that repeating it 1200 times will take about 4 hours (which might be optimistic - the process has been running for 3 hours so far). Not only is it slow, it's using a whole lot of virtual memory. I'm using Saxon, and I had to set java's maximum heap size to 10 GB (!) to avoid getting out of memory errors, and it's currently using 6 GB of physical memory. So here's how I'd really like to do this (in Pythonic pseudocode): persons = {} for id in ids: person[id] = set() for person in all_the_people_in_my_xml_document: persons[person.id].add(person.name) There, I just did it in linear time, with only one sweep of the xml document. Now, is there some way to do something similar in xquery? Surely if I can imagine it, a reasonable programming language should be able to do it (he said quixotically). The problem, I suppose, is that unlike Python, xquery doesn't (as far as I know) have anything like an associative array. Is there some clever way around this? Failing that, is there something better than xquery that I might use to accomplish my goal? Because really, the computational resources I'm throwing at this relatively simple problem are kind of ridiculous.

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• Pure JSP without mixing HTML, by writing html as Java-like code

  - by ADTC

  Please read before answering. This is a fantasy programming technique I'm dreaming up. I want to know if there's anything close in real life. The following JSP page: <% html { head { title {"Pure fantasy";} } body { h1 {"A heading with double quote (\") character";} p {"a paragraph";} String s = "a paragraph in string. the date is "; p { s; new Date().toString(); } table (Border.ZERO, new Padding(27)) { tr { for (int i = 0; i < 10; i++) { td {i;} } } } } } %> could generate the following HTML page: <html> <head> <title>Pure fantasy</title> </head> <body> <h1>A heading with double quote (") character</h1> <p>a paragraph</p> <p>a paragraph in string. the date is 11 December 2012</p> <table border="0" padding="27"> <tr> <td>0</td> <td>1</td> <td>2</td> <td>3</td> <td>4</td> <td>5</td> <td>6</td> <td>7</td> <td>8</td> <td>9</td> </tr> </table> </body> </html> The thing about this fantasy is it reuses the same old Java programming language technique that enable customized keywords used in a way similar to if-else-then, while, try-catch etc to represent html tags in a non-html way that can easily be checked for syntactic correctness, and most importantly can easily be mixed up with regular Java code without being lost in a sea of <%, %>, <%=, out.write(), etc. An added feature is that strings can directly be placed as commands to print out into generated HTML, something Java doesn't support (where pure strings have to be assigned to variables before use). Is there anything in real life that comes close? If not, is it possible to define customized keywords in Java or JSP? Or do I have to create an entirely new programming language for that? What problems do you see with this kind of setup? PS: I know you can use HTML libraries to construct HTML using Java code, but the problem with such libraries is, the source code itself doesn't have a readable HTML representation like the code above does - if you get what I mean.

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• Generating .coverage file programmatic way with Visual Studio 2010

  - by prosseek

  I need to generate .coverage file programmatic way. This post explains a C# code to do it as follows. using System; using System.Collections.Generic; using System.Text; using System.Diagnostics; using Microsoft.VisualStudio.Coverage; using Microsoft.VisualStudio.Coverage.Analysis; // You must add a reference to Microsoft.VisualStudio.Coverage.Monitor.dll namespace Microsoft.VisualStudio { class DumpProgram { static void Main(string[] args) { Process p = new Process(); StringBuilder sb = new StringBuilder("/COVERAGE "); sb.Append("hello.exe"); p.StartInfo.FileName = "vsinstr.exe"; p.StartInfo.Arguments = sb.ToString(); p.Start(); p.WaitForExit(); // TODO: Look at return code – 0 for success // A guid is used to keep track of the run Guid myrunguid = Guid.NewGuid(); Monitor m = new Monitor(); m.StartRunCoverage(myrunguid, "hello.coverage"); // Complete the run m.FinishRunCoverage(myrunguid); Unfortunately, when I compile this code, I get the following error. bin2xml.cs(26,22): error CS0246: The type or namespace name 'Monitor' could not be found (are you missing a using directive or an assembly reference?) bin2xml.cs(26,38): error CS0246: The type or namespace name 'Monitor' could not be found (are you missing a using directive or an assembly reference?) As this post says, there are some changes between VS2008 and VS2010, I think the Monitor class is in some different namespace. What might be wrong? How can I generate the .coverage file programmatically with Visual Studio 2010? ADDED I added using System.Threading to run to get the following error. I run the command csc bin2xml.cs /r:Microsoft.VisualStudio.Coverage.Analysis.dll. bin2xml.cs(28,21): error CS0723: Cannot declare a variable of static type 'System.Threading.Monitor' bin2xml.cs(28,33): error CS0712: Cannot create an instance of the static class 'System.Threading.Monitor' bin2xml.cs(29,23): error CS1061: 'System.Threading.Monitor' does not contain a definition for 'StartRunCoverage' and no extension method 'StartRunCoverage' accepting a first argument of type 'System.Threading.Monitor' could be found (are you missing a using directive or an assembly reference?) bin2xml.cs(31,23): error CS1061: 'System.Threading.Monitor' does not contain a definition for 'FinishRunCoverage' and no extension method 'FinishRunCoverage' accepting a first argument of type 'System.Threading.Monitor' could be found (are you missing a using directive or an assembly reference?) ADDED2 I compiled the code with the following command. csc bin2xml.cs /r:Microsoft.VisualStudio.Coverage.Analysis.dll /r:Microsoft.VisualStudio.Coverage.Monitor.dll Then, I got these error messages. Monitor m = new Monitor(); is at the line 27. bin2xml.cs(27,21): error CS0246: The type or namespace name 'Monitor' could not be found (are you missing a using directive or an assembly reference?) bin2xml.cs(27,37): error CS0246: The type or namespace name 'Monitor' could not be found (are you missing a using directive or an assembly reference?)

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• How do I maximize code coverage?

  - by naivedeveloper

  Hey all, the following is a snippet of code taken from the unix ptx utility. I'm attempting to maximize code coverage on this utility, but I am unable to reach the indicated portion of code. Admittedly, I'm not as strong in my C skills as I used to be. The portion of code is indicated with comments, but it is towards the bottom of the block. if (used_length == allocated_length) { allocated_length += (1 << SWALLOW_REALLOC_LOG); block->start = (char *) xrealloc (block->start, allocated_length); } Any help interpreting the indicated portion in order to cover that block would be greatly appreciated. /* Reallocation step when swallowing non regular files. The value is not the actual reallocation step, but its base two logarithm. */ #define SWALLOW_REALLOC_LOG 12 static void swallow_file_in_memory (const char *file_name, BLOCK *block) { int file_handle; /* file descriptor number */ struct stat stat_block; /* stat block for file */ size_t allocated_length; /* allocated length of memory buffer */ size_t used_length; /* used length in memory buffer */ int read_length; /* number of character gotten on last read */ /* As special cases, a file name which is NULL or "-" indicates standard input, which is already opened. In all other cases, open the file from its name. */ bool using_stdin = !file_name || !*file_name || strcmp (file_name, "-") == 0; if (using_stdin) file_handle = STDIN_FILENO; else if ((file_handle = open (file_name, O_RDONLY)) < 0) error (EXIT_FAILURE, errno, "%s", file_name); /* If the file is a plain, regular file, allocate the memory buffer all at once and swallow the file in one blow. In other cases, read the file repeatedly in smaller chunks until we have it all, reallocating memory once in a while, as we go. */ if (fstat (file_handle, &stat_block) < 0) error (EXIT_FAILURE, errno, "%s", file_name); if (S_ISREG (stat_block.st_mode)) { size_t in_memory_size; block->start = (char *) xmalloc ((size_t) stat_block.st_size); if ((in_memory_size = read (file_handle, block->start, (size_t) stat_block.st_size)) != stat_block.st_size) { error (EXIT_FAILURE, errno, "%s", file_name); } block->end = block->start + in_memory_size; } else { block->start = (char *) xmalloc ((size_t) 1 << SWALLOW_REALLOC_LOG); used_length = 0; allocated_length = (1 << SWALLOW_REALLOC_LOG); while (read_length = read (file_handle, block->start + used_length, allocated_length - used_length), read_length > 0) { used_length += read_length; /* Cannot cover from this point...*/ if (used_length == allocated_length) { allocated_length += (1 << SWALLOW_REALLOC_LOG); block->start = (char *) xrealloc (block->start, allocated_length); } /* ...to this point. */ } if (read_length < 0) error (EXIT_FAILURE, errno, "%s", file_name); block->end = block->start + used_length; } /* Close the file, but only if it was not the standard input. */ if (! using_stdin && close (file_handle) != 0) error (EXIT_FAILURE, errno, "%s", file_name); }

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• how to speed up the code??

  - by kaushik

  i have very huge code about 600 lines plus. cant post the whole thing here. but a particular code snippet is taking so much time,leading to problems. here i post that part of code please tell me what to do speed up the processing.. please suggest the part which may be the reason and measure to improve them if this small part of code is understandable. using_data={} def join_cost(a , b): global using_data #print a #print b save_a=[] save_b=[] print 1 #for i in range(len(m)): #if str(m[i][0])==str(a): save_a=database_index[a] #for i in range(len(m)): # if str(m[i][0])==str(b): #print 'save_a',save_a #print 'save_b',save_b print 2 save_b=database_index[b] using_data[save_a[0]]=save_a s=str(save_a[1]).replace('phone','text') s=str(s)+'.pm' p=os.path.join("c:/begpython/wavnk/",s) x=open(p , 'r') print 3 for i in range(6): x.readline() k2='a' j=0 o=[] while k2 is not '': k2=x.readline() k2=k2.rstrip('\n') oj=k2.split(' ') o=o+[oj] #print o[j] j=j+1 #print j #print o[2][0] temp=long(1232332) end_time=save_a[4] #print end_time k=(j-1) for i in range(k): diff=float(o[i][0])-float(end_time) if diff<0: diff=diff*(-1) if temp>diff: temp=diff pm_row=i #print pm_row #print temp #print o[pm_row] #pm_row=3 q=[] print 4 l=str(p).replace('.pm','.mcep') z=open(l ,'r') for i in range(pm_row): z.readline() k3=z.readline() k3=k3.rstrip('\n') q=k3.split(' ') #print q print 5 s=str(save_b[1]).replace('phone','text') s=str(s)+'.pm' p=os.path.join("c:/begpython/wavnk/",s) x=open(p , 'r') for i in range(6): x.readline() k2='a' j=0 o=[] while k2 is not '': k2=x.readline() k2=k2.rstrip('\n') oj=k2.split(' ') o=o+[oj] #print o[j] j=j+1 #print j #print o[2][0] temp=long(1232332) strt_time=save_b[3] #print strt_time k=(j-1) for i in range(k): diff=float(o[i][0])-float(strt_time) if diff<0: diff=diff*(-1) if temp>diff: temp=diff pm_row=i #print pm_row #print temp #print o[pm_row] #pm_row=3 w=[] l=str(p).replace('.pm','.mcep') z=open(l ,'r') for i in range(pm_row): z.readline() k3=z.readline() k3=k3.rstrip('\n') w=k3.split(' ') #print w cost=0 for i in range(12): #print q[i] #print w[i] h=float(q[i])-float(w[i]) cost=cost+math.pow(h,2) j_cost=math.sqrt(cost) #print cost return j_cost def target_cost(a , b): a=(b+1)*3 b=(a+1)*2 t_cost=(a+b)*5/2 return t_cost r1='shht:ra_77' r2='grx_18' g=[] nodes=[] nodes=nodes+[[r1]] for i in range(len(y_in_db_format)): g=y_in_db_format[i] #print g #print g[0] g.remove(str(g[0])) nodes=nodes+[g] nodes=nodes+[[r2]] print nodes print "lenght of nodes",len(nodes) lists=[] #lists=lists+[r1] for i in range(len(nodes)): for j in range(len(nodes[i])): lists=lists+[nodes[i][j]] #lists=lists+[r2] print lists distance={} for i in range(len(lists)): if i==0: distance[str(lists[i])]=0 else: distance[str(lists[i])]=long(123231223) #print distance group_dist=[] infinity=long(123232323) for i in range(len(nodes)): distances=[] for j in range(len(nodes[i])): #distances=[] if i==0: distances=distances+[[nodes[i][j], 0]] else: distances=distances+[[nodes[i][j],infinity]] group_dist=group_dist+[distances] #print distances print "group_distances",group_dist #print "check",group_dist[0][0][1] #costs={} #for i in range(len(lists)): #if i==0: # costs[str(lists[i])]=1 #else: # costs[str(lists[i])]=get_selfcost(lists[i]) path=[] for i in range(len(nodes)): mini=[] if i!=(len(nodes)-1): #temp=long(123234324) #Now calculate the cost between the current node and each of its neighbour for k in range(len(nodes[(i+1)])): for j in range(len(nodes[i])): current=nodes[i][j] #print "current_node",current j_distance=join_cost( current , nodes[i+1][k]) #t_distance=target_cost( current , nodes[i+1][k]) t_distance=34 #print distance #print "distance between current and neighbours",distance total_distance=(.5*(float(group_dist[i][j][1])+float(j_distance))+.5*(float(t_distance))) #print "total distance between the intial_nodes and current neighbour",total_distance if int(group_dist[i+1][k][1]) > int(total_distance): group_dist[i+1][k][1]=total_distance #print "updated distance",group_dist[i+1][k][1] a=current #print "the neighbour",nodes[i+1][k],"updated the value",a mini=mini+[[str(nodes[i+1][k]),a]] print mini

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• Code runs 6 times slower with 2 threads than with 1

  - by Edward Bird

  So I have written some code to experiment with threads and do some testing. The code should create some numbers and then find the mean of those numbers. I think it is just easier to show you what I have so far. I was expecting with two threads that the code would run about 2 times as fast. Measuring it with a stopwatch I think it runs about 6 times slower! void findmean(std::vector<double>*, std::size_t, std::size_t, double*); int main(int argn, char** argv) { // Program entry point std::cout << "Generating data..." << std::endl; // Create a vector containing many variables std::vector<double> data; for(uint32_t i = 1; i <= 1024 * 1024 * 128; i ++) data.push_back(i); // Calculate mean using 1 core double mean = 0; std::cout << "Calculating mean, 1 Thread..." << std::endl; findmean(&data, 0, data.size(), &mean); mean /= (double)data.size(); // Print result std::cout << " Mean=" << mean << std::endl; // Repeat, using two threads std::vector<std::thread> thread; std::vector<double> result; result.push_back(0.0); result.push_back(0.0); std::cout << "Calculating mean, 2 Threads..." << std::endl; // Run threads uint32_t halfsize = data.size() / 2; uint32_t A = 0; uint32_t B, C, D; // Split the data into two blocks if(data.size() % 2 == 0) { B = C = D = halfsize; } else if(data.size() % 2 == 1) { B = C = halfsize; D = hsz + 1; } // Run with two threads thread.push_back(std::thread(findmean, &data, A, B, &(result[0]))); thread.push_back(std::thread(findmean, &data, C, D , &(result[1]))); // Join threads thread[0].join(); thread[1].join(); // Calculate result mean = result[0] + result[1]; mean /= (double)data.size(); // Print result std::cout << " Mean=" << mean << std::endl; // Return return EXIT_SUCCESS; } void findmean(std::vector<double>* datavec, std::size_t start, std::size_t length, double* result) { for(uint32_t i = 0; i < length; i ++) { *result += (*datavec).at(start + i); } } I don't think this code is exactly wonderful, if you could suggest ways of improving it then I would be grateful for that also.

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• How to convert image to bitmap code for bluetooth print in iphone

  - by John Patel

  I am interested to print image from iPhone programmatically using bluetooth printer device. In one of the sample code I have implemented code for Text print but in that sample I am not getting how to convert image into format, like unsigned char buffer3[796]={ 0x55 , 0x66 , 0x77 , 0x88 , 0x44 , 0x1B , 0x58 , 0x31 , 0x19, 0x20, 0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x80 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x01 ,0xC0 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x01 ,0x80 ,0x00 ,0x03 ,0x60 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x03 ,0xA0 ,0x00 ,0x07 ,0xB0 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x05 ,0x60 ,0x00 ,0x07 ,0xD8 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x05 ,0xA0 ,0x00 ,0x13 ,0xEC ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x04 ,0x20 ,0x00 ,0x29 ,0xF4 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x03 ,0xC0 ,0x00 ,0x64 ,0xF9 ,0x00 ,0x0F ,0xFF ,0x9C ,0x01 ,0xC0 ,0x19 ,0xFF ,0xC0 ,0x7F ,0xFC ,0x7F ,0xF9 ,0xC0 ,0x3D ,0xFF ,0xF1 ,0xFF ,0xE3 ,0xFF ,0xC0 ,0x00 ,0x00 ,0xF2 ,0x73 ,0x80 ,0x0F ,0xFF ,0x9C ,0x01 ,0xC0 ,0x19 ,0xFF ,0xC0 ,0x7F ,0xFE ,0x7F ,0xFD ,0xE0 ,0x3D ,0xFF ,0xF1 ,0xFF ,0xE3 ,0xFF ,0xC0 ,0x00 ,0x00 ,0x79 ,0x26 ,0xC0 ,0x0F ,0xFF ,0xDC ,0x01 ,0xC0 ,0x19 ,0xFF ,0xC0 ,0x7F ,0xFE ,0xFF ,0xFD ,0xF0 ,0x7D ,0xFF ,0xFB ,0xFF ,0xF7 ,0xFF ,0xE0 ,0x00 ,0x03 ,0x3C ,0x8F ,0x60 ,0x0C ,0x01 ,0xDC ,0x01 ,0xC0 ,0x19 ,0x80 ,0x00 ,0x70 ,0x0E ,0xE0 ,0x1D ,0xF0 ,0x7D ,0x80 ,0x3B ,0x80 ,0x77 ,0x00 ,0xE0 ,0x00 ,0x04 ,0x9E ,0x8F ,0xB0 ,0x0E ,0x01 ,0xDC ,0x01 ,0xC0 ,0x19 ,0x80 ,0x00 ,0x70 ,0x0E ,0xE0 ,0x1D ,0xF8 ,0xFD ,0x80 ,0x33 ,0x80 ,0x77 ,0x00 ,0xE0 ,0x00 ,0x0E ,0x4F ,0x27 ,0xD8 ,0x0F ,0xFF ,0x9C ,0x01 ,0xC0 ,0x19 ,0xFF ,0xC0 ,0x7F ,0xFC ,0xE0 ,0x1D ,0xF9 ,0xFD ,0xFF ,0xF3 ,0x80 ,0x77 ,0x00 ,0xE0 ,0x00 ,0x0F ,0x26 ,0x53 ,0xC8 ,0x0F ,0xFF ,0x9C ,0x01 ,0xC0 ,0x19 ,0xFF ,0xC0 ,0x7F ,0xFC ,0xEF ,0xFD ,0xDD ,0xDD ,0xFF ,0xF3 ,0x80 ,0x77 ,0x00 ,0xE0 ,0x00 ,0x07 ,0x90 ,0xC9 ,0xF0 ,0x0F ,0xFF ,0xDC ,0x01 ,0xC0 ,0x19 ,0xFF ,0xC0 ,0x7F ,0xFE ,0xEF ,0xFD ,0xDF ,0x9D ,0xFF ,0xFB ,0x80 ,0x77 ,0x00 ,0xE0 ,0x00 ,0x03 ,0xC9 ,0xE4 ,0xE0 ,0x0C ,0x00 ,0xDC ,0x01 ,0xC0 ,0x19 ,0x80 ,0x00 ,0x70 ,0x06 ,0xE7 ,0xFD ,0xCF ,0x9D ,0x80 ,0x3B ,0x80 ,0x77 ,0x00 ,0xE0 ,0x00 ,0x01 ,0xF0 ,0xF2 ,0x40 ,0x0E ,0x01 ,0xDC ,0x00 ,0xC0 ,0x19 ,0x80 ,0x00 ,0x70 ,0x0E ,0xE0 ,0x1D ,0xCF ,0x1D ,0x80 ,0x3B ,0x80 ,0x77 ,0x00 ,0xE0 ,0x00 ,0x00 ,0xE6 ,0x79 ,0x00 ,0x0F ,0xFF ,0xDF ,0xFC ,0xFF ,0xF9 ,0xFF ,0xC0 ,0x7F ,0xFE ,0xE0 ,0x1D ,0xC7 ,0x1D ,0xFF ,0xFB ,0xFF ,0xF7 ,0xFF ,0xE0 ,0x00 ,0x00 ,0x49 ,0x3D ,0x00 ,0x0F ,0xFF ,0x9F ,0xFC ,0xFF ,0xF9 ,0xFF ,0xC0 ,0x7F ,0xFE ,0xE0 ,0x1D ,0xC2 ,0x1D ,0xFF ,0xF1 ,0xFF ,0xE3 ,0xFF ,0xC0 ,0x00 ,0x00 ,0x1C ,0x9E ,0x00 ,0x0F ,0xFF ,0x1F ,0xFC ,0x7F ,0xE1 ,0xFF ,0xC0 ,0x7F ,0xFC ,0xE0 ,0x1D ,0xC0 ,0x1D ,0xFF ,0xE0 ,0xFF ,0xC1 ,0xFF ,0x80 ,0x00 ,0x00 ,0x1E ,0x4C ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x0F ,0x20 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x07 ,0x90 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x03 ,0xE0 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x01 ,0xC0 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x80 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 }; //[self addLabel:@"buffer3 is selected"]; [[session outputStream] write:(const uint8_t *)buffer3 maxLength:796];//send print package*/ This is sample code for Image print I am not able to print any other image because I am not having idea how to convert UIImage or NSData to the below mentioned Bit code. If any proper step by step method to do Image to bitmap conversion, then please let me know this.

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• How to unit test synchronized code

  - by gillJ

  Hi, I am new to Java and junit. I have the following peice of code that I want to test. Would appreciate if you could send your ideas about what's the best way to go about testing it. Basically, the following code is about electing a leader form a Cluster. The leader holds a lock on the shared cache and services of the leader get resumed and disposed if it somehow looses the lock on the cache. How can i make sure that a leader/thread still holds the lock on the cache and that another thread cannot get its services resumed while the first is in execution? public interface ContinuousService { public void resume(); public void pause(); } public abstract class ClusterServiceManager { private volatile boolean leader = false; private volatile boolean electable = true; private List<ContinuousService> services; protected synchronized void onElected() { if (!leader) { for (ContinuousService service : services) { service.resume(); } leader = true; } } protected synchronized void onDeposed() { if (leader) { for (ContinuousService service : services) { service.pause(); } leader = false; } } public void setServices(List<ContinuousService> services) { this.services = services; } @ManagedAttribute public boolean isElectable() { return electable; } @ManagedAttribute public boolean isLeader() { return leader; } public class TangosolLeaderElector extends ClusterServiceManager implements Runnable { private static final Logger log = LoggerFactory.getLogger(TangosolLeaderElector.class); private String election; private long electionWaitTime= 5000L; private NamedCache cache; public void start() { log.info("Starting LeaderElector ({})",election); Thread t = new Thread(this, "LeaderElector ("+election+")"); t.setDaemon(true); t.start(); } public void run() { // Give the connection a chance to start itself up try { Thread.sleep(1000); } catch (InterruptedException e) {} boolean wasElectable = !isElectable(); while (true) { if (isElectable()) { if (!wasElectable) { log.info("Leadership requested on election: {}",election); wasElectable = isElectable(); } boolean elected = false; try { // Try and get the lock on the LeaderElectorCache for the current election if (!cache.lock(election, electionWaitTime)) { // We didn't get the lock. cycle round again. // This code to ensure we check the electable flag every now & then continue; } elected = true; log.info("Leadership taken on election: {}",election); onElected(); // Wait here until the services fail in some way. while (true) { try { Thread.sleep(electionWaitTime); } catch (InterruptedException e) {} if (!cache.lock(election, 0)) { log.warn("Cache lock no longer held for election: {}", election); break; } else if (!isElectable()) { log.warn("Node is no longer electable for election: {}", election); break; } // We're fine - loop round and go back to sleep. } } catch (Exception e) { if (log.isErrorEnabled()) { log.error("Leadership election " + election + " failed (try bfmq logs for details)", e); } } finally { if (elected) { cache.unlock(election); log.info("Leadership resigned on election: {}",election); onDeposed(); } // On deposition, do not try and get re-elected for at least the standard wait time. try { Thread.sleep(electionWaitTime); } catch (InterruptedException e) {} } } else { // Not electable - wait a bit and check again. if (wasElectable) { log.info("Leadership NOT requested on election ({}) - node not electable",election); wasElectable = isElectable(); } try { Thread.sleep(electionWaitTime); } catch (InterruptedException e) {} } } } public void setElection(String election) { this.election = election; } @ManagedAttribute public String getElection() { return election; } public void setNamedCache(NamedCache nc) { this.cache = nc; }

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• Runtime error in C code (strange double conversion)

  - by Miro Hassan

  I have a strange runtime error in my C code. The Integers comparison here works fine. But in the Decimals comparison, I always get that the second number is larger than the first number, which is false. I am pretty new to C and programming in general, so this is a complex application to me. #include <stdio.h> #include <stdbool.h> #include <stdlib.h> int choose; long long neLimit = -1000000000; long long limit = 1000000000; bool big(a,b) { if ((a >= limit) || (b >= limit)) return true; else if ((a <= neLimit) || (b <= neLimit)) return true; return false; } void largerr(a,b) { if (a > b) printf("\nThe First Number is larger ..\n"); else if (a < b) printf("\nThe Second Number is larger ..\n"); else printf("\nThe Two Numbers are Equal .. \n"); } int main() { system("color e && title Numbers Comparison && echo off && cls"); start:{ printf("Choose a Type of Comparison :\n\t1. Integers\n\t2. Decimals \n\t\t I Choose Number : "); scanf("%i", &choose); switch(choose) { case 1: goto Integers; break; case 2: goto Decimals; break; default: system("echo Please Choose a Valid Option && pause>nul && cls"); goto start; } } Integers: { system("title Integers Comparison && cls"); long x , y; printf("\nFirst Number : \t"); scanf("%li", &x); printf("\nSecond Number : "); scanf("%li", &y); if (big(x,y)) { printf("\nOut of Limit .. Too Big Numbers ..\n"); system("pause>nul && cls") ; goto Integers; } largerr(x,y); printf("\nFirst Number : %li\nSecond Number : %li\n",x,y); goto exif; } Decimals: { system("title Decimals Comparison && cls"); double x , y; printf("\nFirst Number : \t"); scanf("%le", &x); printf("\nSecond Number : "); scanf("%le", &y); if (big(x,y)) { printf("\nOut of Limit .. Too Big Numbers ..\n"); system("pause>nul && cls") ; goto Decimals; } largerr(x,y); goto exif; } exif:{ system("pause>nul"); system("cls"); main(); } }

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• Rewrite C++ code into Objective C

  - by Phil_M

  Hello I got some C++ Sourcecode that I would like to rewrite into Objective C. It would help me alot if someone could write me a header file for this Code. When I get the Headerfile I would be able to rewrite the rest of the Sourcecode. It would be very nice if someone could help me please. Thanks I will poste the sourcecode here: #include <stdlib.h> #include <iostream.h> #define STATES 5 int transitionTable[STATES][STATES]; // function declarations: double randfloat (void); int chooseNextEventFromTable (int current, int table[STATES][STATES]); int chooseNextEventFromTransitionTablee (int currentState); void setTable (int value, int table[STATES][STATES]); ////////////////////////////////////////////////////////////////////////// int main(void) { int i; // for demo purposes: transitionTable[0][0] = 0; transitionTable[0][1] = 20; transitionTable[0][2] = 30; transitionTable[0][3] = 50; transitionTable[0][4] = 0; transitionTable[1][0] = 35; transitionTable[1][1] = 25; transitionTable[1][2] = 20; transitionTable[1][3] = 30; transitionTable[1][4] = 0; transitionTable[2][0] = 70; transitionTable[2][1] = 0; transitionTable[2][2] = 15; transitionTable[2][3] = 0; transitionTable[2][4] = 15; transitionTable[3][0] = 0; transitionTable[3][1] = 25; transitionTable[3][2] = 25; transitionTable[3][3] = 0; transitionTable[3][4] = 50; transitionTable[4][0] = 13; transitionTable[4][1] = 17; transitionTable[4][2] = 22; transitionTable[4][3] = 48; transitionTable[4][4] = 0; int currentState = 0; for (i=0; i<10; i++) { std::cout << currentState << " "; currentState = chooseNextEventFromTransitionTablee(currentState); } return 0; }; ////////////////////////////////////////////////////////////////////////// ////////////////////////////// // // chooseNextEventFromTransitionTable -- choose the next note. // int chooseNextEventFromTransitionTablee(int currentState) { int targetSum = 0; int sum = 0; int targetNote = 0; int totalevents = 0; int i; currentState = currentState % STATES; // remove any octave value for (i=0; i<STATES; i++) { totalevents += transitionTable[currentState][i]; } targetSum = (int)(randfloat() * totalevents + 0.5); while (targetNote < STATES && sum+transitionTable[currentState][targetNote] < targetSum) { sum += transitionTable[currentState][targetNote]; targetNote++; } return targetNote; } ////////////////////////////// // // randfloat -- returns a random number between 0.0 and 1.0. // double randfloat(void) { return (double)rand()/RAND_MAX; } ////////////////////////////// // // setTable -- set all values in the transition table to the given value. // void setTable(int value, int table[STATES][STATES]) { int i, j; for (i=0; i<STATES; i++) { for (j=0; j<STATES; j++) { table[i][j] = value; } } }

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• New line (in the code) after <li> element breaking layout

  - by BT643

  Weirdly, I've never come across this issue before, but I've just started making a site and the top navigation isn't playing nicely. I want a small amount of white space between each menu item, but when I have new lines between my <li> elements and my <a> elements in my IDE (Netbeans), the white space disappears, yet it looks fine if I have <li><a></a></li> all on the same line. I was always under the impression html ignored white space in the code. I've checked for any weird characters causing problems in other text editors and can't find anything. Here's the code... Like this the menu looks correct but code looks ugly (I know it looks fine when it's this simple, but I'm going be adding more complexity in which makes it look awful all on one line): <ul id="menu"> <li><a href="#">About</a></li> <li class="active"><a href="<?php echo site_url("tracklist"); ?>">Track List</a></li> <li><a href="<?php echo site_url("stats"); ?>">Stats</a></li> <li><a href="#">Stats</a></li> </ul> Like this the menu looks wrong but code looks fine: <ul id="menu"> <li> <a href="#">About</a> </li> <li class="active"> <a href="<?php echo site_url("tracklist"); ?>">Track List</a> </li> <li> <a href="<?php echo site_url("stats"); ?>">Stats</a> </li> <li> <a href="#">Stats</a> </li> </ul> Here's the css: #menu { float: right; } #menu li { display: inline-block; padding: 5px; background-color: #932996; border-bottom: solid 1px #932996; } #menu li:hover { border-bottom: solid 3px #FF0000; } #menu li.active { background-color: #58065e; } I'm sure it's something simple I'm doing wrong... but can someone shed some light on this for me? Sorry for the lengthy post (my first on stackoverflow).

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• Knockout with ASP.Net MVC2 - HTML Extension Helpers for input controls

  - by Renso

  Goal: Defining Knockout-style input controls can be tedious and also may be something that you may find obtrusive, mixing your HTML with data bind syntax as well as binding your aspx, ascx files to Knockout. The goal is to make specifying Knockout specific HTML tags easy, seamless really, as well as being able to remove references to Knockout easily. Environment considerations: ASP.Net MVC2 or later Knockoutjs.js How to:     public static class HtmlExtensions     {         public static string DataBoundCheckBox(this HtmlHelper helper, string name, bool isChecked, object htmlAttributes)         {             var builder = new TagBuilder("input");             var dic = new RouteValueDictionary(htmlAttributes) { { "data-bind", String.Format("checked: {0}", name) } };             builder.MergeAttributes(dic);             builder.MergeAttribute("type", @"checkbox");             builder.MergeAttribute("name", name);             builder.MergeAttribute("value", @"true");             if (isChecked)             {                 builder.MergeAttribute("checked", @"checked");             }             return builder.ToString(TagRenderMode.SelfClosing);         }         public static MvcHtmlString DataBoundSelectList(this HtmlHelper helper, string name, IEnumerable<SelectListItem> selectList, String optionLabel)         {             var attrProperties = new StringBuilder();             attrProperties.Append(String.Format("optionsText: '{0}'", name));             if (!String.IsNullOrEmpty(optionLabel)) attrProperties.Append(String.Format(", optionsCaption: '{0}'", optionLabel));             attrProperties.Append(String.Format(", value: {0}", name));             var dic = new RouteValueDictionary { { "data-bind", attrProperties.ToString() } };             return helper.DropDownList(name, selectList, optionLabel, dic);         }         public static MvcHtmlString DataBoundSelectList(this HtmlHelper helper, string name, IEnumerable<SelectListItem> selectList, String optionLabel, object htmlAttributes)         {             var attrProperties = new StringBuilder();             attrProperties.Append(String.Format("optionsText: '{0}'", name));             if (!String.IsNullOrEmpty(optionLabel)) attrProperties.Append(String.Format(", optionsCaption: '{0}'", optionLabel));             attrProperties.Append(String.Format(", value: {0}", name));             var dic = new RouteValueDictionary(htmlAttributes) {{"data-bind", attrProperties}};             return helper.DropDownList(name, selectList, optionLabel, dic);         }         public static String DataBoundSelectList(this HtmlHelper helper, String options, String optionsText, String value)         {             return String.Format("<select data-bind=\"options: {0},optionsText: '{1}',value: {2}\"></select>", options, optionsText, value);         }         public static MvcHtmlString DataBoundTextBox(this HtmlHelper helper, string name, object value, object htmlAttributes)         {             var dic = new RouteValueDictionary(htmlAttributes);             dic.Add("data-bind", String.Format("value: {0}", name));             return helper.TextBox(name, value, dic);         }         public static MvcHtmlString DataBoundTextBox(this HtmlHelper helper, string name, string observable, object value, object htmlAttributes)         {             var dic = new RouteValueDictionary(htmlAttributes);             dic.Add("data-bind", String.Format("value: {0}", observable));             return helper.TextBox(name, value, dic);         }         public static MvcHtmlString DataBoundTextArea(this HtmlHelper helper, string name, string value, int rows, int columns, object htmlAttributes)         {             var dic = new RouteValueDictionary(htmlAttributes);             dic.Add("data-bind", String.Format("value: {0}", name));             return helper.TextArea(name, value, rows, columns, dic);         }         public static MvcHtmlString DataBoundTextArea(this HtmlHelper helper, string name, string observable, string value, int rows, int columns, object htmlAttributes)         {             var dic = new RouteValueDictionary(htmlAttributes);             dic.Add("data-bind", String.Format("value: {0}", observable));             return helper.TextArea(name, value, rows, columns, dic);         }         public static string BuildUrlFromExpression<T>(this HtmlHelper helper, Expression<Action<T>> action)         {             var values = CreateRouteValuesFromExpression(action);             var virtualPath = helper.RouteCollection.GetVirtualPath(helper.ViewContext.RequestContext, values);             if (virtualPath != null)             {                 return virtualPath.VirtualPath;             }             return null;         }         public static string ActionLink<T>(this HtmlHelper helper, Expression<Action<T>> action, string linkText)         {             return helper.ActionLink(action, linkText, null);         }         public static string ActionLink<T>(this HtmlHelper helper, Expression<Action<T>> action, string linkText, object htmlAttributes)         {             var values = CreateRouteValuesFromExpression(action);             var controllerName = (string)values["controller"];             var actionName = (string)values["action"];             values.Remove("controller");             values.Remove("action");             return helper.ActionLink(linkText, actionName, controllerName, values, new RouteValueDictionary(htmlAttributes)).ToHtmlString();         }         public static MvcForm Form<T>(this HtmlHelper helper, Expression<Action<T>> action)         {             return helper.Form(action, FormMethod.Post);         }         public static MvcForm Form<T>(this HtmlHelper helper, Expression<Action<T>> action, FormMethod method)         {             var values = CreateRouteValuesFromExpression(action);             string controllerName = (string)values["controller"];             string actionName = (string)values["action"];             values.Remove("controller");             values.Remove("action");             return helper.BeginForm(actionName, controllerName, values, method);         }         public static MvcForm Form<T>(this HtmlHelper helper, Expression<Action<T>> action, FormMethod method, object htmlAttributes)         {             var values = CreateRouteValuesFromExpression(action);             string controllerName = (string)values["controller"];             string actionName = (string)values["action"];             values.Remove("controller");             values.Remove("action");             return helper.BeginForm(actionName, controllerName, values, method, new RouteValueDictionary(htmlAttributes));         }         public static string VertCheckBox(this HtmlHelper helper, string name, bool isChecked)         {             return helper.CustomCheckBox(name, isChecked, null);         }          public static string CustomCheckBox(this HtmlHelper helper, string name, bool isChecked, object htmlAttributes)         {             TagBuilder builder = new TagBuilder("input");             builder.MergeAttributes(new RouteValueDictionary(htmlAttributes));             builder.MergeAttribute("type", "checkbox");             builder.MergeAttribute("name", name);             builder.MergeAttribute("value", "true");             if (isChecked)             {                 builder.MergeAttribute("checked", "checked");             }             return builder.ToString(TagRenderMode.SelfClosing);         }         public static string Script(this HtmlHelper helper, string script, object scriptAttributes)         {             var pathForCRMScripts = ScriptsController.GetPathForCRMScripts();             if (ScriptOptimizerConfig.EnableMinimizedFileLoad)             {                 string newPathForCRM = pathForCRMScripts + "Min/";                 ScriptsController.ServerPathMapper = new ServerPathMapper();                 string fullPath = ScriptsController.ServerMapPath(newPathForCRM);                 if (!File.Exists(fullPath + script))                     return null;                 if (!Directory.Exists(fullPath))                     return null;                 pathForCRMScripts = newPathForCRM;             }             var builder = new TagBuilder("script");             builder.MergeAttributes(new RouteValueDictionary(scriptAttributes));             builder.MergeAttribute("type", @"text/javascript");             builder.MergeAttribute("src", String.Format("{0}{1}", pathForCRMScripts.Replace("~", String.Empty), script));             return builder.ToString(TagRenderMode.SelfClosing);         }         private static RouteValueDictionary CreateRouteValuesFromExpression<T>(Expression<Action<T>> action)         {             if (action == null)                 throw new InvalidOperationException("Action must be provided");             var body = action.Body as MethodCallExpression;             if (body == null)             {                 throw new InvalidOperationException("Expression must be a method call");             }             if (body.Object != action.Parameters[0])             {                 throw new InvalidOperationException("Method call must target lambda argument");             }             // This will build up a RouteValueDictionary containing the controller name, action name, and any             // parameters passed as part of the "action" parameter.             string name = body.Method.Name;             string controllerName = typeof(T).Name;             if (controllerName.EndsWith("Controller", StringComparison.OrdinalIgnoreCase))             {                 controllerName = controllerName.Remove(controllerName.Length - 10, 10);             }             var values = BuildParameterValuesFromExpression(body) ?? new RouteValueDictionary();             values.Add("controller", controllerName);             values.Add("action", name);             return values;         }         private static RouteValueDictionary BuildParameterValuesFromExpression(MethodCallExpression call)         {             // Build up a RouteValueDictionary containing parameter names as keys and parameter values             // as values based on the MethodCallExpression passed in.             var values = new RouteValueDictionary();             ParameterInfo[] parameters = call.Method.GetParameters();             // If the passed in method has no parameters, just return an empty dictionary.             if (parameters.Length == 0)             {                 return values;             }             for (int i = 0; i < parameters.Length; i++)             {                 object parameterValue;                 Expression expression = call.Arguments[i];                 // If the current parameter is a constant, just use its value as the parameter value.                 var constant = expression as ConstantExpression;                 if (constant != null)                 {                     parameterValue = constant.Value;                 }                 else                 {                     // Otherwise, compile and execute the expression and use that as the parameter value.                     var function = Expression.Lambda<Func<object>>(Expression.Convert(expression, typeof(object)),                                                                    new ParameterExpression[0]);                     try                     {                         parameterValue = function.Compile()();                     }                     catch                     {                         parameterValue = null;                     }                 }                 values.Add(parameters[i].Name, parameterValue);             }             return values;         }     }   Some observations: The first two DataBoundSelectList overloaded methods are specifically built to load the data right into the drop down box as part of the HTML response stream rather than let Knockout's engine populate the options client-side. The third overloaded method does it client-side via the viewmodel. The first two overloads can be done when you have no requirement to add complex JSON objects to your lists. Furthermore, why render and parse the JSON object when you can have it all built and rendered server-side like any other list control.

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• Have unit test generators helped you when working with legacy code?

  - by Duncan Bayne

  I am looking at a small (~70kLOC including generated) C# (.NET 4.0, some Silverlight) code-base that has very low test coverage. The code itself works in that it has passed user acceptance testing, but it is brittle and in some areas not very well factored. I would like to add solid unit test coverage around the legacy code using the usual suspects (NMock, NUnit, StatLight for the Silverlight bits). My normal approach is to start working through the project, unit testing & refactoring, until I am satisfied with the state of the code. I've done this many times in the past, and it's worked well. However, this time I'm thinking of using a test generator (in particular Pex) to create the test framework, then manually fleshing it out. My question is: have you used unit test generators in the past when commencing work on a legacy codebase, and if so, would you recommend them? My fear is that the generated tests will miss the semantic nuances of the code-base, leading to the dreaded situation of having tests for the sake of the coverage metric, rather than tests which clearly express the intended behaviour in code.

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• Reasons NOT to open source not-for-profit code?

  - by naught101

  I am a big fan of open source code. I think I understand most of the advantages of going open source. I'm a science student researcher, and I have to work with quite a surprising amount of software and code that is not open source (either it's proprietary, or it's not public). I can't really see a good reason for this, and I can see that the code, and people using it, would definitely benefit from being more public (if nothing else, in science it's vital that your results can be replicated if necessary, and that's much harder if others don't have access to your code). Before I go out and start proselytising, I want to know: are there any good arguments for not releasing not-for-profit code publicly, and with an OSI-compliant license? (I realise there are a few similar questions on SE, but most focus on situations where the code is primarily used for making money, and I couldn't much relevant in the answers.) Clarification: By "not-for-profit", I am including downstream profit motives, such as parent-company brand-recognition and investor profit expectations. In other words, the question relates only to software for which there is NO profit motive tied to the software what so ever.

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• what are some good interview questions for a position that consists of reviewing code for security vulnerabilities?

  - by John Smith

  The position is an entry-level position that consists of reading C++ code and identifying lines of code that are vulnerable to buffer overflows, out-of-bounds reads, uncontrolled format strings, and a bunch of other CWE's. We don't expect the average candidate to be knowledgeable in the area of software security nor do we expect him or her to be an expert computer programmer; we just expect them to be able to read the code and correctly identify vulnerabilities. I guess I could ask them the typical interview questions: reverse a string, print a list of prime numbers, etc, but I'm not sure that their ability to write code under pressure (or lack thereof) tells me anything about their ability to read code. Should I instead focus on testing their knowledge of C++? Ask them if they understand what a pointer is and how bitwise operators work? My only concern about asking that kind of question is that I might unfairly weed out people who don't happen to have the knowledge but have the ability to acquire it. After all, it's not like they will be writing a single line of code, and it's not like we are looking only for people who already know C++, since we are willing to train the right candidate. (It is true that I could ask those questions only to those candidates who claim to know C++, but I'd like to give the same "test" to everyone.) Should I just focus on trying to get an idea of their level of intelligence? In other words, should I get them to talk and pay attention to the way they articulate their thoughts, and so on?

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• 724% Return on an SFA project with Oracle Sales Cloud and Marketing Cloud combined!

  - by Richard Lefebvre

  Oracle Sales Cloud and Marketing Cloud customer Apex IT gained just that?a 724% return on investment (ROI) when it implemented these Oracle Cloud solutions in its fast-moving, rapidly-growing business. Apex IT was just announced as a winner of the Nucleus Research 11th annual Technology ROI Awards. The award, given by the analyst firm, highlights organizations that have successfully leveraged IT deployments to maximize value per dollar spent. Fast Facts: Return on Investment – 724% Payback – 2 months Average annual benefit – $91,534 Cost : Benefit Ratio – 1:48 Business Benefits In addition to the ROI and cost metrics the award calls out improvements in Apex IT’s business operations—across both Sales and Marketing teams: Improved ability to identify new opportunities and focus sales resources on higher-probability deals Reduced administration and manual lead tracking—resulting in more time selling and a net new client increase of 46% Increased campaign productivity for both Marketing and Sales, including Oracle Marketing Cloud’s automation of campaign tracking and nurture programs Improved margins with more structured and disciplined sales processes—resulting in more effective deal negotiations Read the full Apex IT ROI Case Study. You also can learn more about Apex IT’s business, including the company’s work with Oracle Sales and Marketing Cloud on behalf of its clients. You can point your prospects and customers to the CX blog for a similar recap of the Apex IT award and a link to the Case Study.

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• What is the/Is there a right way to tell management that our code sucks?

  - by Azkar

  Our code is bad. It might not have always been considered bad, but it is bad and is only going downhill. I started fresh out of college less than a year ago, and many of the things in our code puzzle me beyond belief. At first I figured that as the new guy I should keep my mouth shut until I learned a little more about our code base, but I've seen plenty to know that it's bad. Some of the highlights: We still use frames (try getting something out of a querystring, almost impossible) VBScript Source Safe We 'use' .NET - by that I mean we have .net wrappers that call COM DLLs making it almost impossible to debug easily Everything is basically one giant function Code is not maintainable. Each page has multiple files that are created every time a new page is made. The main page basically does Response.Write() a bunch of times to render the HTML (runat="server"? no way). After that there can be a lot of logic on the client side (VBScript), and finally the page submits to itself (often time storing many things in hidden fields) where it then posts to a processing page which can do things such as save the data to the database. The specifications we get are laughable. Often times they call for things like "auto-populate field X with either field Y or field Z" with no indication of when to choose field Y or field Z. I'm sure some of this is a result of not being employed at a software company, but I feel as if people writing software should at least care about the quality of their code. I can't even imagine that if I were to bring something up that anything would be done soon, as there is a large deadline looming, but we are continuing to write bad code and use bad practices. What can I do? How do I even bring these issues up? 75% of my team agree with me and have brought up these issues in the past, yet nothing gets changed.

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