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  • question regarding rails framework code

    - by Joseph Misiti
    I noticed that the code in the rails framework is using the following convention all over the place: class SomeClass class << self def some function end end end rather than class SomeClass end def SomeClass.function end and class SomeClass def self.somefunction end end What is the reason for this design choice? They all seem to accomplish them same thing

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  • C++ static code analysis tool on Windows

    - by KTC
    What C++ static code analysis tool are there on Microsoft Windows, and which would you recommend? Please state whether a particular tool relies on cygwin, and whether it cost money. One per post as per for voting up & down. Similar Question: http://stackoverflow.com/questions/141498/what-open-source-c-static-analysis-tools-are-available

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  • how to read values from the remote OPC Server

    - by Shailesh Jaiswal
    I have created one asp.net web service. In this web service I am using the web method as follows. The web service is related to the OPC ( OLE for process control) public string ReadServerItems(string ServerName) { string txt = ""; ArrayList obj = new ArrayList(); XmlServer Srv = new XmlServer("XDAGW.CS.WCF.Eval.1"); RequestOptions opt = new RequestOptions(); ReadRequestItemList iList = new ReadRequestItemList(); iList.Items = new ReadRequestItem[3]; iList.Items[0] = new ReadRequestItem(); iList.Items[0].ItemName = "ServerInfo.ConnectedClients"; iList.Items[1] = new ReadRequestItem(); iList.Items[1].ItemName = "ServerInfo.TotalGroups"; iList.Items[2] = new ReadRequestItem(); iList.Items[2].ItemName = "EventSources.Area1.Tracking"; ReplyItemList rslt; OPCError[] err; ReplyBase reply = Srv.Read(opt, iList, out rslt, out err); if ((rslt == null)) txt += err[0].Text; else { foreach (xmldanet.xmlda.ItemValue iv in rslt.Items) { txt += iv.ItemName; if (iv.ResultID == null) // success { txt += " = " + iv.Value.ToString() + "\r\n"; obj.Add(txt); } else txt += " : Error: " + iv.ResultID.Name + "\r\n"; } } return txt; } I am using the namespaces as follows using xmldanet; using xmldanet.xmlda; I have installed XMLDA.NET client component evaluation. In this there is an in built Test client which successfully reads the values of these data items from the remote OPC server. I also provides the template through which we can build the OPC based applications. In the above code I am trying to read the values of the data items but i am not able to read the values. I have applied the breakpoint. In that I can see that the condition if (iv.ResultID == null) becomes false & also there is null values in the variable rslt. Please tell me where I am doing mistake ? how should I correct my mistake ? can provide me the correct code ?

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  • Parser generator for JavaME

    - by Anders K.
    First: I have looked at this SO question but unfortunately there is no mention of JavaME I am looking for a parser/lexer generator that produces code that can run on the Blackberry and its (obnoxious) JavaME. E.g. at first I thought I could use ANTLR however it seems the run-time library is not compatible with JavaME TIA

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  • iphone s/w version 3.1.2 (7D11) not supporting in XCode 3.1.4 SDK 3.1

    - by Shibin Moideen
    Hi, I just updated my iPhone OS to 3.1.2(7D11) but when i tried to debug application in my device its not working. It is showing Code Sign error: Provisioning profile 'AF7973F9-B977-44F5-98C4-0C1976A41B10' can't be found Also in the organizer window its showing "XCode cannot find the software image to install the version" Can anyone help me in solving this.. please help needed Thanks, Shibin

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  • Hex Code Brightness PHP?

    - by Juddling
    I want users on my website to be able to pick a hex colour, and I just want to display white text for dark colours and black text for light colours. Can you work out the brightness from a hex code (preferably PHP)?

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  • Python code translation to JVM

    - by jldupont
    Is there such a thing as a "translator" (for lack of a better word in my mind now) that translates Python code directly to JVM / Dalvik bytecode? Would be great for writing Android applications in Python! NOTE: I know about the scripting capabilities of the Android platform but I am looking for something that would generate a '.apk' without having to install the 'scripting' package... annoying for end-users.

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  • How to add a click event to a textbox created in code

    - by jvcoach23
    I'm using silverlight 3 and i'd like to create a handler and event wired up to a mouse click in a text box that was created in code behind. Can someone point me in the right direction. I need to make it so that some things fire off when that textbox is clicked into. if you have an example in vb.net that would be even better. thanks shannon

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  • Managing IIS through Delphi code.

    - by Roman Prikhodchenko
    Hi! I'm developing an Inno Setup installer and I need to manage an IIS server from my delphi code. I've googled how to add/remove ISAPI filters and how to create a virtual folder. However, I still need to be able to add/remove/list ISAPI extensions and create/remove websites. So my question is how can I do that?

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  • Toggle iPhone tethering by code

    - by Canada Dev
    I live in Canada, so am fortunate that I can tether. One issue is that to toggle tethering, you need to drill down four screens in Settings, which is just a big hassle. A Google search returned nothing, so I was wondering if anyone here knew the code to turn on/off tethering? I know there's a toggle for SBSettings, but I do not have a jailbroken phone, I just want to create an app I build onto my phone and have an icon for quickly toggling it. Thanks

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  • please help turn a simple Python2 code to PHP

    - by user296516
    Hi guys, Sorry to bother again, but I really need help transforming this Python2 code into PHP. net, cid, lac = 25002, 9164, 4000 import urllib a = '000E00000000000000000000000000001B0000000000000000000000030000' b = hex(cid)[2:].zfill(8) + hex(lac)[2:].zfill(8) c = hex(divmod(net,100)[1])[2:].zfill(8) + hex(divmod(net,100)[0])[2:].zfill(8) string = (a + b + c + 'FFFFFFFF00000000').decode('hex') data = urllib.urlopen('http://www.google.com/glm/mmap',string) r = data.read().encode('hex') print float(int(r[14:22],16))/1000000, float(int(r[22:30],16))/1000000 Would be great if someone could help, thanks in advance!

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  • sqlite3_prepare_v2 throws SQLITE_ERROR in iPhone code

    - by incognitii
    I have a piece of code that used to work, and other iterations of it that DO work within the same app, and have compared code, and they are identical in structure. This is driving me INSANE!!!!!! In this instance, sqlite3_prepare_v2 is throwing one of those useless SQLITE_ERROR exceptions. Apparently, it can FIND the database, and OPEN the database, but it can't prepare a statement for it. Does ANYONE have any ideas? I'm desperate here. second_maindatabaseName = @"database.db"; NSArray *documentPaths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); NSString *documentsDir = [documentPaths objectAtIndex:0]; second_maindatabasePath = [documentsDir stringByAppendingPathComponent:second_maindatabaseName]; // Setup the database object sqlite3 *database; // Init the entry requirements Array BOOL success; NSFileManager *fileManager = [NSFileManager defaultManager]; success = [fileManager fileExistsAtPath:second_maindatabasePath]; if(!success) { NSString *databasePathFromApp = [[[NSBundle mainBundle] resourcePath] stringByAppendingPathComponent:second_maindatabaseName]; [fileManager copyItemAtPath:databasePathFromApp toPath:second_maindatabasePath error:nil]; [fileManager release]; } if(sqlite3_open([second_maindatabasePath UTF8String], &database) == SQLITE_OK) { NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults]; value1 = [defaults stringForKey:kConst1]; value2 = [defaults stringForKey:kConst2]; value3 = [defaults stringForKey:kConst3]; value4 = [defaults stringForKey:kConst4]; const char *sqlStatement = "SELECT * FROM myTable WHERE Field1 = ? AND Field2 = ? AND Field3 = ? AND Field4 = ?"; sqlite3_stmt *compiledStatement; int error_code = sqlite3_prepare_v2(database, sqlStatement, -1, &compiledStatement, NULL); if(error_code == SQLITE_OK) { // Loop through the results and add them to the feeds array sqlite3_bind_text(compiledStatement,1,[value1 UTF8String],-1,SQLITE_TRANSIENT); sqlite3_bind_text(compiledStatement,2,[value2 UTF8String],-1,SQLITE_TRANSIENT); sqlite3_bind_text(compiledStatement,3,[value3 UTF8String],-1,SQLITE_TRANSIENT); sqlite3_bind_text(compiledStatement,4,[value4 UTF8String],-1,SQLITE_TRANSIENT); while(sqlite3_step(compiledStatement) == SQLITE_ROW) { // Read the data from the result row NSString *aNewValue = [NSString stringWithUTF8String:(char *)sqlite3_column_text(compiledStatement, 1)]; } } sqlite3_finalize(compiledStatement); } sqlite3_close(database);

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  • Oracle Sql Developer vendor code 1317

    - by Zemian
    Hi, I am using Oracle Sql Developer to browse a MySQL database. When I browse table with Columns tab(shows table definitions), some of tables will display an Error Encountered dialog that says: Vendor code 1317. Does anyone know how I can resolve this? Thanks, /Z

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  • Eclipse/Java code completion not working

    - by Rob
    I've downloaded, unzipped and setup Eclipse 3.4.2 with some plugins (noteable, EPIC, Clearcase, QuantumDB, MisterQ). Now I find when I'm editing Java projects the code completion is not working. If I type String. and press ctrl-space a popup shows "No Default Proposals" and the status bar at the bottom shows "No completions available". Any ideas? Thanks....

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  • a code to track clicks on outgoing links

    - by Tristan
    Hello, I found this on the web: $('a[href^=http]:not("[href*=://' + document.domain + ']")').click(function() { pageTracker._trackPageview('/outgoing/' + $(this).attr('href')); }); But it's not working. In my Google Analytics account there are no /outgoing/ links showing (it's been 24+ hours since I implemented it). What's wrong with this code? I'm using jQuery of course ;)

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  • Saving a reference to a int.

    - by Scott Chamberlain
    Here is a much simplified version of what I am trying to do static void Main(string[] args) { int test = 0; int test2 = 0; Test A = new Test(ref test); Test B = new Test(ref test); Test C = new Test(ref test2); A.write(); //Writes 1 should write 1 B.write(); //Writes 1 should write 2 C.write(); //Writes 1 should write 1 Console.ReadLine(); } class Test { int _a; public Test(ref int a) { _a = a; //I loose the reference here } public void write() { var b = System.Threading.Interlocked.Increment(ref _a); Console.WriteLine(b); } } In my real code I have a int that will be incremented by many threads however where the threads a called it will not be easy to pass it the parameter that points it at the int(In the real code this is happening inside a IEnumerator). So a requirement is the reference must be made in the constructor. Also not all threads will be pointing at the same single base int so I can not use a global static int either. I know I can just box the int inside a class and pass the class around but I wanted to know if that is the correct way of doing something like this? What I think could be the correct way: static void Main(string[] args) { Holder holder = new Holder(0); Holder holder2 = new Holder(0); Test A = new Test(holder); Test B = new Test(holder); Test C = new Test(holder2); A.write(); //Writes 1 should write 1 B.write(); //Writes 2 should write 2 C.write(); //Writes 1 should write 1 Console.ReadLine(); } class Holder { public Holder(int i) { num = i; } public int num; } class Test { Holder _holder; public Test(Holder holder) { _holder = holder; } public void write() { var b = System.Threading.Interlocked.Increment(ref _holder.num); Console.WriteLine(b); } } Is there a better way than this?

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