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  • Working with partial views

    - by MrW
    Hi. I'm trying to create a page that contains a grid and searching. The issue is that I want to have a partial view for the grid and one for the searching. If doing a search, this should render the grid partial view with the new information. At the moment I need information, such as what column I'm sorting by and so on, from the grid (currently stored in viewdata), in order to do the search as I want to keep those settings. This information is only available in the grid partial though. What's the best approach of this to make it neat and nice in the code, but not a mess to work with? Where can I store information that I need in the other partial view? Partial View 1; <table> <%= Html.CreateGrid(Model, "Grid", "Grid", (int)ViewData["SortColumn"], (bool)ViewData["SortedASC"])%> </table> Partial View 2; <div class="searchControl"> <input type="text" class="SearchBox" href="<%= Url.Action("Grid", "Grid", new {page = 1, columnToSortBy=/* would like to access viewdata from partial view 1 here. */, sortASC = /* would like to access viewdata from partial view 1 here. */ } ) %>" /> <input type="submit" value="Search" class="SearchButton" /> </div> I know I might take the completely wrong approach on this, so feel free to point me in the right one! Thanks!

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  • Clear UIWebView content upon dismissal of modal view (iPhone OS 3.0)

    - by Ricky
    I currently have a UIWebView that is displayed within a modal view. It is basically a detail view that provides a view of a page when the user clicks a link. When the view is dismissed and then brought up again (when the user clicks another link), the previously-loaded content is still visible and the new content loads "on top" of the last content. This makes sense because the instance of the UIWebView persists between sessions and is only released when the memory is needed. However, I would like to completely clear the UIWebView when the modal view is dismissed so that 1) content is cleared and 2) memory is freed. Thus far my research and attempts have not found an answer. These links haven't worked for me: http://stackoverflow.com/questions/2184688/is-it-possible-to-free-memory-of-uiwebview http://stackoverflow.com/questions/2311564/reused-uiwebview-showing-previous-loaded-content-for-a-brief-second-on-iphone I've tried [[NSURLCache sharedURLCache] removeAllCachedResponses]; and setting the webView to nil and manually releasing the webView upon modal-view-dismiss to no avail. Any thoughts from the wizened masses?

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  • perl threading problem

    - by Alice Wozownik
    I'm writing a multithreaded website uptime checker in perl, and here is the basic code so far (includes only threading part): !/usr/bin/perl use LWP::UserAgent; use Getopt::Std; use threads; use threads::shared; my $maxthreads :shared = 50; my $threads :shared = 0; print "Website Uptime Checker\n"; my $infilename = $ARGV[0]; chomp($infilename); open(INFILE, $infilename); my $outfilename = $ARGV[1]; chomp($outfilename); open(OUTFILE, "" . $outfilename); OUTFILE-autoflush(1); while ($site = ) { chomp($site); while (1) { if ($threads < $maxthreads) { $threads++; my $thr = threads-create(\&check_site, $site); $thr-detach(); last; } else { sleep(1); } } } while ($threads 0) { sleep(1); } sub check_site { $server = $_[0]; print "$server\n"; $threads--; } It gives an error after a while: Can't call method "detach" on an undefined value at C:\perl\webchecker.pl line 28, line 245. What causes this error? I know it is at detach, but what am I doing wrong in my code? Windows shows lots of free memory, so it should not be the computer running out of memory, this error occurs even if I set $maxthreads as low as 10 or possibly even lower.

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  • BN_hex2bn magicaly segfaults in openSSL

    - by xunil154
    Greetings, this is my first post on stackoverflow, and i'm sorry if its a bit long. I'm trying to build a handshake protocol for my own project and am having issues with the server converting the clients RSA's public key to a Bignum. It works in my clent code, but the server segfaults when attempting to convert the hex value of the clients public RSA to a bignum. I have already checked that there is no garbidge before or after the RSA data, and have looked online, but i'm stuck. header segment: typedef struct KEYS { RSA *serv; char* serv_pub; int pub_size; RSA *clnt; } KEYS; KEYS keys; Initializing function: // Generates and validates the servers key /* code for generating server RSA left out, it's working */ //Set client exponent keys.clnt = 0; keys.clnt = RSA_new(); BN_dec2bn(&keys.clnt->e, RSA_E_S); // RSA_E_S contains the public exponent Problem code (in Network::server_handshake): // *Recieved an encrypted message from the network and decrypt into 'buffer' (1024 byte long)* cout << "Assigning clients RSA" << endl; // I have verified that 'buffer' contains the proper key if (BN_hex2bn(&keys.clnt->n, buffer) < 0) { Error("ERROR reading server RSA"); } cout << "clients RSA has been assigned" << endl; The program segfaults at BN_hex2bn(&keys.clnt->n, buffer) with the error (valgrind output) Invalid read of size 8 at 0x50DBF9F: BN_hex2bn (in /usr/lib/libcrypto.so.0.9.8) by 0x40F23E: Network::server_handshake() (Network.cpp:177) by 0x40EF42: Network::startNet() (Network.cpp:126) by 0x403C38: main (server.cpp:51) Address 0x20 is not stack'd, malloc'd or (recently) free'd Process terminating with default action of signal 11 (SIGSEGV) Access not within mapped region at address 0x20 at 0x50DBF9F: BN_hex2bn (in /usr/lib/libcrypto.so.0.9.8) And I don't know why it is, Im using the exact same code in the client program, and it works just fine. Any input is greatly appriciated!

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  • method for specialized pathfinding?

    - by rlbond
    I am working on a roguelike in my (very little) free time. Each level will basically be a few rectangular rooms connected together by paths. I want the paths between rooms to be natural-looking and windy, however. For example, I would not consider the following natural-looking: B X X X XX XX XX AXX I really want something more like this: B X XXXX X X X X AXXXXXXXX These paths must satisfy a few properties: I must be able to specify an area inside which they are bounded, I must be able to parameterize how windy and lengthy they are, The lines should not look like they started at one path and ended at the other. For example, the first example above looks as if it started at A and ended at B, because it basically changed directions repeatedly until it lined up with B and then just went straight there. I was hoping to use A*, but honestly I have no idea what my heuristic would be. I have also considered using a genetic algorithm, but I don't know how practical that method might end up. My question is, what is a good way to get the results I want? Please do not just specify a method like "A*" or "Dijkstra's algorithm," because I also need help with a good heuristic.

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  • Read binary file into a struct C#

    - by Robert Höglund
    I'm trying to read binary data using C#. I have all information about the layout of the data in the files I want to read. I'm able to read the data "chunk by chunk", i.e. getting the first 40 bytes of data converting it to a string, get the next 40 bytes, ... Since there are at least three slighlty different version of the data, I would like to read the data directly into a struct. It just feels so much more right than by reading it "line by line". I have tried the following approach but to no avail:StructType aStruct; int count = Marshal.SizeOf(typeof(StructType)); byte[] readBuffer = new byte[count]; BinaryReader reader = new BinaryReader(stream); readBuffer = reader.ReadBytes(count); GCHandle handle = GCHandle.Alloc(readBuffer, GCHandleType.Pinned); aStruct = (StructType) Marshal.PtrToStructure(handle.AddrOfPinnedObject(), typeof(StructType)); handle.Free(); The stream is an opened FileStream from which I have began to read from. I get an AccessViolationException when using Marshal.PtrToStructure. The stream contains more information than I'm trying to read since I'm not interested in data at the end of the file. The struct is defined like:[StructLayout(LayoutKind.Explicit)] struct StructType { [FieldOffset(0)] public string FileDate; [FieldOffset(8)] public string FileTime; [FieldOffset(16)] public int Id1; [FieldOffset(20)] public string Id2; } The examples code is changed from original to make this question shorter. How would I read binary data from a file into a struct?

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  • Maven assembly - Error reading assemblies

    - by Laurent
    Dear all, I have defined a personalized jar-with-dependencies assembly descriptor. However, when I execute it with mvn assembly:assembly, I get : ... [INFO] META-INF/ already added, skipping [INFO] META-INF/MANIFEST.MF already added, skipping [INFO] javax/ already added, skipping [INFO] META-INF/ already added, skipping [INFO] META-INF/MANIFEST.MF already added, skipping [INFO] META-INF/maven/ already added, skipping [INFO] [assembly:assembly {execution: default-cli}] [INFO] ------------------------------------------------------------------------ [ERROR] BUILD ERROR [INFO] ------------------------------------------------------------------------ [INFO] Error reading assemblies: No assembly descriptors found. My jar-with-dependencies.xml is in src/main/resources/assemblies/. My assembly descriptor is the following : <?xml version='1.0' encoding='UTF-8'?> <assembly> <id>jar-with-dependencies</id> <formats> <format>jar</format> </formats> <dependencySets> <dependencySet> <scope>runtime</scope> <unpack>true</unpack> <unpackOptions> <excludes> <exclude>**/LICENSE*</exclude> <exclude>**/README*</exclude> </excludes> </unpackOptions> </dependencySet> </dependencySets> <fileSets> <fileSet> <directory>${project.build.outputDirectory}</directory> <outputDirectory>/</outputDirectory> </fileSet> <fileSet> <directory>src/main/resources/META-INF/services</directory> <outputDirectory>META-INF/services</outputDirectory> </fileSet> </fileSets> </assembly> And my project pom.xml is : <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-assembly-plugin</artifactId> <version>2.2-beta-5</version> <executions> <execution> <id>jar-with-dependencies</id> <phase>package</phase> <goals> <goal>single</goal> </goals> <configuration> <descriptors> <descriptor>jar-with-dependencies.xml</descriptor> </descriptors> <archive> <manifest> <mainClass>org.my.app.HowTo</mainClass> </manifest> </archive> </configuration> </execution> </executions> </plugin> When mvn assembly:assembly is performed, dependencies are unpacked and I get the previous error when unpack has finished. Moreover, if I execute mvn -e assembly:assembly it is say that no descriptors has been found, however it try to unpack dependencies and a JAR with dependencies is created but it doesn't contain META-INF/services/* as specified in descriptor : [ERROR] BUILD ERROR [INFO] ------------------------------------------------------------------------ [INFO] Error reading assemblies: No assembly descriptors found. [INFO] ------------------------------------------------------------------------ [INFO] Trace org.apache.maven.lifecycle.LifecycleExecutionException: Error reading assemblies: No assembly descriptors found. at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoals(DefaultLifecycleExecutor.java:719) at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeStandaloneGoal(DefaultLifecycleExecutor.java:569) at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoal(DefaultLifecycleExecutor.java:539) at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoalAndHandleFailures(DefaultLifecycleExecutor.java:387) at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeTaskSegments(DefaultLifecycleExecutor.java:284) at org.apache.maven.lifecycle.DefaultLifecycleExecutor.execute(DefaultLifecycleExecutor.java:180) at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:328) at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:138) at org.apache.maven.cli.MavenCli.main(MavenCli.java:362) at org.apache.maven.cli.compat.CompatibleMain.main(CompatibleMain.java:60) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.codehaus.classworlds.Launcher.launchEnhanced(Launcher.java:315) at org.codehaus.classworlds.Launcher.launch(Launcher.java:255) at org.codehaus.classworlds.Launcher.mainWithExitCode(Launcher.java:430) at org.codehaus.classworlds.Launcher.main(Launcher.java:375) Caused by: org.apache.maven.plugin.MojoExecutionException: Error reading assemblies: No assembly descriptors found. at org.apache.maven.plugin.assembly.mojos.AbstractAssemblyMojo.execute(AbstractAssemblyMojo.java:356) at org.apache.maven.plugin.DefaultPluginManager.executeMojo(DefaultPluginManager.java:490) at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoals(DefaultLifecycleExecutor.java:694) ... 17 more Caused by: org.apache.maven.plugin.assembly.io.AssemblyReadException: No assembly descriptors found. at org.apache.maven.plugin.assembly.io.DefaultAssemblyReader.readAssemblies(DefaultAssemblyReader.java:206) at org.apache.maven.plugin.assembly.mojos.AbstractAssemblyMojo.execute(AbstractAssemblyMojo.java:352) ... 19 more I don't see my error. Does someone has a solution ? Kind Regards Laurent

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  • NSFILEMANAGER CRASHING IN APP DELEGATE

    - by theiphoneguy
    I have this code in a method called from applicationDidFinishLaunching. It works in the simulator, but crashes on the iPhone. There are about 1,600 2KB mp3 files being copied in this operation. If I try to instantiate the app multiple times, it will eventually copy more each time until the app eventually will start without crashing. I am releasing everything I allocate. I have about 20GB disk space free on the iPhone. If I progressively comment out code and run it on the iPhone, the copyItemAtPath seems to be the suspect. (void)createCopyOfAudioFiles:(BOOL)force { @try { NSError *error; NSString *component; NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); NSString *documentsDirectory = [paths objectAtIndex:0]; NSFileManager *fileManager = [[NSFileManager alloc] init]; NSEnumerator *enumerator = [[[NSBundle mainBundle]pathsForResourcesOfType:@"mp3" inDirectory:nil] objectEnumerator]; while ((component = [enumerator nextObject]) != nil) { NSArray *temp = [component componentsSeparatedByString:@".app/"]; NSString *file = [NSString stringWithFormat:@"%@", [temp objectAtIndex:1]]; NSString *writableAudioPath = [documentsDirectory stringByAppendingPathComponent:file]; BOOL success = [fileManager fileExistsAtPath:writableAudioPath]; if (success &amp;&amp; !force) { continue; } else if (success &amp;&amp; force) { success = [fileManager removeItemAtPath:writableAudioPath error:&amp;error]; } success = [fileManager copyItemAtPath:component toPath:writableAudioPath error:&amp;error]; if (!success) { @throw [NSException exceptionWithName:[error localizedDescription] reason:[error localizedFailureReason] userInfo:nil]; } } [fileManager release]; } @catch (NSException *exception) { NSLog(@"%@", exception); @throw [NSException exceptionWithName:exception.name reason:exception.reason userInfo:nil]; } @finally { } }

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  • How are you taking advantage of Multicore?

    - by tgamblin
    As someone in the world of HPC who came from the world of enterprise web development, I'm always curious to see how developers back in the "real world" are taking advantage of parallel computing. This is much more relevant now that all chips are going multicore, and it'll be even more relevant when there are thousands of cores on a chip instead of just a few. My questions are: How does this affect your software roadmap? I'm particularly interested in real stories about how multicore is affecting different software domains, so specify what kind of development you do in your answer (e.g. server side, client-side apps, scientific computing, etc). What are you doing with your existing code to take advantage of multicore machines, and what challenges have you faced? Are you using OpenMP, Erlang, Haskell, CUDA, TBB, UPC or something else? What do you plan to do as concurrency levels continue to increase, and how will you deal with hundreds or thousands of cores? If your domain doesn't easily benefit from parallel computation, then explaining why is interesting, too. Finally, I've framed this as a multicore question, but feel free to talk about other types of parallel computing. If you're porting part of your app to use MapReduce, or if MPI on large clusters is the paradigm for you, then definitely mention that, too. Update: If you do answer #5, mention whether you think things will change if there get to be more cores (100, 1000, etc) than you can feed with available memory bandwidth (seeing as how bandwidth is getting smaller and smaller per core). Can you still use the remaining cores for your application?

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  • nginx - redirection doesn't work as expected

    - by Luis
    I have a domain listening on both http and https. I want to redirect all the traffic to https except for two specific locations. It works, but only for mydomain.com, not for www.mydomain.com. Here the config: upstream mydomain_rails { server unix:/home/deploy/mydomain/shared/pids/unicorn.sock; } # blog.mydomain.com server { listen 80; server_name blog.mydomain.com; rewrite ^ http://www.mydomain.com/de/blog permanent; } # blog.mydomain.com.br server { listen 80; server_name blog.mydomain.com.br; rewrite ^ http://www.mydomain.com/br/blog permanent; } # www.mydomain.de server { listen 80; server_name mydomain.de www.mydomain.de; rewrite ^ https://www.mydomain.com/de permanent; } # www.mydomain.com.br server { listen 80; server_name mydomain.com.br www.mydomain.com.br; rewrite ^ https://www.mydomain.com/br permanent; } server { listen 80; server_name mydomain.com; rewrite ^ http://www.mydomain.com$request_uri permanent; } ## www.mydomain.com ## Redirect http to https, keep blogs on plain http server { listen 80; server_name www.mydomain.com; location / { # if ($host ~* ^(www\.mydomain\.com)$ ) { rewrite ^/(.*)$ https://www.mydomain.com/$1 permanent; # } # return 444; } # Matches any request starting with '/br/blog' and proxies to the upstream blog instance location ~* /br/blog { proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; proxy_set_header Host $http_host; proxy_redirect off; if (!-f $request_filename) { rewrite ^/br/blog$ /; rewrite ^/br/blog/(.*)$ /$1; proxy_pass http://mydomain_blog_br; break; } } # Matches any request starting with '/de/blog' and proxies to the upstream blog instance location ~* /de/blog { proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; proxy_set_header Host $http_host; proxy_redirect off; if (!-f $request_filename) { rewrite ^/de/blog$ /; rewrite ^/de/blog/(.*)$ /$1; proxy_pass http://mydomain_blog; break; } } } # www.mydomain.com server { add_header Cache-Control "public, must-revalidate"; server_name mydomain.com www.mydomain.com; listen 443; ssl on; ssl_certificate /etc/ssl/mydomain.com/sslchain.crt; ssl_certificate_key /etc/ssl/mydomain.com/privatekey.key; ## Strict Transport Security (ForceHTTPS), max-age 30d add_header Strict-Transport-Security "max-age=2592000; includeSubdomains"; ## Due SSL encryption, rather to increase the keepalive requests and timeout keepalive_requests 10; keepalive_timeout 60 60; root /home/deploy/mydomain/current/public/; error_log /home/deploy/mydomain/shared/log/nginx.error.log info; access_log /home/deploy/mydomain/shared/log/nginx.access.log main; ## Redirect from non-www to www if ($host = 'mydomain.com' ) { rewrite ^/(.*)$ https://www.mydomain.com/$1 permanent; } ## Caching images for 3 months location ~* \.(ico|css|js|gif|jpe?g|png)\?[0-9]+$ { expires 30d; break; } ## Deny illegal Host headers if ($host !~* ^(mydomain.com|www.mydomain.com)$ ) { return 444; } ## Deny certain User-Agents (case insensitive) if ($http_user_agent ~* (Baiduspider|webalta|Wget|WordPress|youdao|jakarta) ) { return 444; } ## Deny certain Referers (case insensitive) if ($http_referer ~* (dating|diamond|forsale|girl|jewelry|nudit|poker|porn|poweroversoftware|sex|teen|webcam|zippo|zongdo) ) { return 444; } ## Enable maintenance page. The page is copied in during capistrano deployment set $maintenance 0; if (-f $document_root/index.html) { set $maintenance 1; } if ($request_uri ~* (jpg|jpeg|gif|png|js|css)$) { set $maintenance 0; } if ($maintenance) { rewrite ^(.*)$ /index.html last; break; } location /uk { auth_basic "Restricted"; auth_basic_user_file /etc/nginx/htpasswd; root /home/deploy/mydomain/current/public/; try_files $uri @fallback; } # Matches any request starting with '/br/blog' and proxies to the upstream blog instance location ^~ /br/blog { proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; proxy_set_header Host $http_host; proxy_redirect off; if (!-f $request_filename) { rewrite ^/br/blog$ /; rewrite ^/br/blog/(.*)$ /$1; proxy_pass http://mydomain_blog_br; break; } } # Matches any request starting with '/de/blog' and proxies to the upstream blog instance location ^~ /de/blog { proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; proxy_set_header Host $http_host; proxy_redirect off; if (!-f $request_filename) { rewrite ^/de/blog$ /; rewrite ^/de/blog/(.*)$ /$1; proxy_pass http://mydomain_blog; break; }} # Matches any request starting with '/lp' and proxies to the upstream blog instance location /lp { proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; proxy_set_header Host $http_host; proxy_redirect off; rewrite ^/lp(/?.*)$ /$1; proxy_pass http://mydomain_landingpage; break; } #Matches any request, and looks for static files before reverse proxying to the upstream app server socket location / { root /home/deploy/mydomain/current/public/; try_files $uri @fallback; } # Called after the above pattern, if no static file is found location @fallback { proxy_set_header X-Sendfile-Type X-Accel-Redirect; proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; proxy_set_header Host $http_host; proxy_redirect off; proxy_pass http://mydomain_rails; } ## All other errors get the generic error page error_page 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 495 496 497 500 501 502 503 504 505 506 507 /500.html; location /500.html { root /home/deploy/mydomain/current/public/; } } I defined the blog upstream. As said, it works properly for mydomain.com, but not for www.mydomain.com. Any idea?

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  • Synchronizing an ERWin model with a Visual Studio 2008 GDR 2/2010 db project

    - by Grant Back
    I am looking for options to get our vast collection of DB objects across many DBs into source control (TFS 2010). Once we succeed here, we will work toward generating our alter scripts for a particular DB change via TFS build. The problem is, our data architecture group is responsible for maintaining the DB objects (excluding SPs), and they work within a model centric process, via ERWin. What this means, is that they maintain the DBs via ERWin models, and generate alters from them that are used to release changes. In order to achieve our goal of getting the DB objects (not just the ERWin models) into TFS, I believe the best option is to do this via Visual Studio DB projects. From what I can tell, there is very little urgency for CA to continue supporting an integration between ERWin and Visual Studio, that no longer works as of Visual Studio 2008 DB Ed. GDR. If I have been mislead in this regard, please feel free to set me straight. One potential solution is to: Perform changes in the ERWin model. Take the alter script generated from ERWin, and import the script into the appropriate Visual Studio DB project, updating the objects in the in the DB project Check the changed objects in the DB project into TFS. TFS Build executes to generate the alter scripts that will be used to push the changes through our release process. My question is, is this solution viable, or are there any other options?

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  • Are there code signing certificates cheaper than US$99 per year? [closed]

    - by gerryLowry
    K Software discounts Comodo code signing certificates to US$99 per year. In the past, I've seen Commodo code signing certificates for US$80. I'm excluding CAcert which AFAIK are FREE but are not covered by browsers like Internet Explorer AFAIK. QUESTION: What is the best price per year for a code signing certificate? Thank you ~~ gerry (lowry) Edit: **THIS SHOULD NOT HAVE BEEN CLOSED** from the FAQ: http://stackoverflow.com/faq ---------------------------- What kind of questions can I ask here? Programming questions, of course! As long as your question is: * detailed and specific <====== YES! * written clearly and simply <====== YES! * of interest to other programmers <====== YES! I've been programming for over 40 years. http://gerrylowryprogrammer.com/ I've taught computer programming at the community college level. I'm a Star level contributer to forums.asp.net. http://forums.asp.net/members/gerrylowry.aspx IMO, I've a very good idea what is of interest to other programmers. MORE INFORMATION http://en.wikipedia.org/wiki/Code_signing http://msdn.microsoft.com/en-us/library/ms537361%28VS.85%29.aspx also: via Google: code signing Ensuring the integrity of code and executables that one distributes is just as much about programming as is knowing how to flip bits in assembler, use delegates in C#, and use the BDD context/specification still of "test first testing".

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  • Python for a hobbyist programmer ( a few questions)

    - by Matt
    I'm a hobbyist programmer (only in TI-Basic before now), and after much, much, much debating with myself, I've decided to learn Python. I don't have a ton of free time to teach myself a hundred languages and all programming I do will be for personal use or for distributing to people who need them, so I decided that I needed one good, strong language to be good at. My questions: Is python powerful enough to handle most things that a typical programmer might do in his off-time? I have in mind things like complex stat generators based on user input for tabletop games, making small games, automate install processes, and build interactive websites, but probably a hundred things along those lines Does python handle networking tasks fairly well? Can python source be obscufated (mispelled I think), or is it going to be open-source by nature? The reason I ask this is because if I make something cool and distribute it, I don't want some idiot script kiddie to edit his own name in and say he wrote it And how popular is python, compared to other languages. Ideally, my language would be good and useful with help found online without extreme difficulty, but not so common that every idiot with computer knows python. I like the idea of knowing a slightly obscure language. Thanks a ton for any help you can provide.

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  • Ascii Bytes Array To Int32 or Double

    - by Michael Covelli
    I'm re-writing alibrary with a mandate to make it totally allocation free. The goal is to have 0 collections after the app's startup phase is done. Previously, there were a lot of calls like this: Int32 foo = Int32.Parse(ASCIIEncoding.ASCII.GetString(bytes, start, length)); Which I believe is allocating a string. I couldn't find a C# library function that would do the same thing automatically. I looked at the BitConverter class, but it looks like that is only if your Int32 is encoded with the actual bytes that represent it. Here, I have an array of bytes representing Ascii characters that represent an Int32. Here's what I did public static Int32 AsciiBytesToInt32(byte[] bytes, int start, int length) { Int32 Temp = 0; Int32 Result = 0; Int32 j = 1; for (int i = start + length - 1; i >= start; i--) { Temp = ((Int32)bytes[i]) - 48; if (Temp < 0 || Temp > 9) { throw new Exception("Bytes In AsciiBytesToInt32 Are Not An Int32"); } Result += Temp * j; j *= 10; } return Result; } Does anyone know of a C# library function that already does this in a more optimal way? Or an improvement to make the above run faster (its going to be called millions of times during the day probably). Thanks!

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  • Did I find a bug in WriteableBitmap when using string literals

    - by liserdarts
    For performance reasons I'm converting a large list of images into a single image. This code does exactly what I want. Private Function FlattenControl(Control As UIElement) As Image Control.Measure(New Size(1000, 1000)) Control.Arrange(New Rect(0, 0, 1000, 1000)) Dim ImgSource As New Imaging.WriteableBitmap(1000, 1000) ImgSource.Render(Control, New TranslateTransform) ImgSource.Invalidate Dim Img As New Image Img.Source = ImgSource Return Img End Function I can add all the images into a canvas pass the canvas to this function and I get back one image. My code to load all the images looks like this. Public Function BuildTextures(Layer As GLEED2D.Layer) As FrameworkElement Dim Container As New Canvas For Each Item In Layer.Items If TypeOf Item Is GLEED2D.TextureItem Then Dim Texture = CType(Item, GLEED2D.TextureItem) Dim Url As New Uri(Texture.texture_filename, UriKind.Relative) Dim Img As New Image Img.Source = New Imaging.BitmapImage(Url) Container.Children.Add(Img) End If Next Return FlattenControl(Container) End Function The GLEED2D.Layer and GLEED2D.TextureItem classes are from the free level editor GLEED2D (http://www.gleed2d.de/). The texture_filename on every TextureItem is "Images/tree_clipart_pine_tree.png" This works just fine, but it's just a proof of concept. What I really need to do (among other things) is have the path to the image hard coded. If I replace Texture.texture_filename in the code above with the string literal "Images/tree_clipart_pine_tree.png" the images do not appear in the final merged image. I can add a breakpoint and see that the WriteableBitmap has all of it's pixels as 0 after the call to Invalidate. I have no idea how this could cause any sort of difference, but it gets stranger. If I remove the call to FlattenControl and just return the Canvas instead, the images are visible. It's only when I use the string literal with the WriableBitmap that the images do not appear. I promise you that the value in the texture_filename property is exactly "Images/tree_clipart_pine_tree.png". I'm using Silverlight 3 and I've also reproduced this in Silverlight 4. Any ideas?

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  • Why should we call SuppressFinalize when we dont have a destructor

    - by somaraj
    I have few Question for which I am not able to get a proper answer . 1) Why should we call SuppressFinalize in the Dispose function when we dont have a destructor . 2) Dispose and finalize are used for freeing resources before the object is garbage collected. Whether it is managed or unmanaged resource we need to free it , then why we need a condition inside the dispose funtion , saying pass 'true' when we call this overriden function from IDisposable:Dispose and pass false when called from a finalize. See the below code i copied from net. class Test : IDisposable { private bool isDisposed = false; ~Test() { Dispose(false); } protected void Dispose(bool disposing) { if (disposing) { // Code to dispose the managed resources of the class } // Code to dispose the un-managed resources of the class isDisposed = true; } public void Dispose() { Dispose(true); GC.SuppressFinalize(this); } } what if I remove the boolean protected Dispose function and implement the as below. class Test : IDisposable { private bool isDisposed = false; ~Test() { Dispose(); } public void Dispose() { // Code to dispose the managed resources of the class // Code to dispose the un-managed resources of the class isDisposed = true; // Call this since we have a destructor . what if , if we dont have one GC.SuppressFinalize(this); } }

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  • No long-running conversations - IllegalArgumentException: Stack must not be null

    - by Markos Fragkakis
    Hi all, I have a very simple application with just 2 pages on WebLogic 10.3.2 (11g), Seam 2.2.0.GA. I have a command button in each, which makes a redirect-after-post to the other. This works well, as I see the URL of the current page I am seeing in the address bar. BUT, even though I have no long-running conversations defined, after a random number of clicks, and - I think - after a random number of seconds (~10s - 60s) I get the lovely exception at the end of this post. Now, if I have understood how temporary conversations work when redirecting this happens: When I first see my application, the url is http://localhost:7001/myapp When I click the button in pageA.xhtml, I end up in "pageB.xhtml?cid=26". This is normal because Seam extends the temporary conversation of the first request to last until the renderResponse phase of the redirect. So, it uses the cid (Conversation Id) of the extended temporary conversation to find any propagated parameters. When I click the button in pageB.xhtml, I end up in pageA.xhtml?cid=26 The same cid was given to the new extended temporary conversation. This is normal because the conversation ended at the end of the previous redirect-after-post, and not the number 26 is free to use as a cid. Is this all correct? If yes, why does this happen: If I re-type the applications home address (showing pageA) and re-click, I end up in pageB.xhtml?cid=29, which is a different number than 26. But 26 has ended after the previous RenderResponse phase, befire I re-types the url. Why is it not used instead of 29? So, to sup up, 2 questions: Why do I get the exception, even though I have not started any long-running conversations? What happens exactly with the cid? On what basis does it change? Cheers,

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  • Using PHP Gettext Extension vs PHP Arrays in Multilingual Websites?

    - by janoChen
    So far the only 2 good things that I've seen about using gettext instead of arrays is that I don't have to create the "greeting" "sub-array" (or whatever its called). And I don't have to create a folder for the "default language". Are there other pros and cos of using gettext and php arrays for multilingual websites? USING GETTEXT: spanish/messages.po: #: test.php:3 msgid "Hello World!" msgstr "Hola Mundo" index.php: <?php echo _("Hello World!"); ?> index.php?lang=spanish: <?php echo _("Hello World!"); ?> turns to Hola Mundo USING PHP ARRAYS: lang.en.php <?php $lang = array( "greeting" => "Hello World", ); ?> lang.es.php <?php $lang = array( "greeting" => "Hola Mundo", ); ?> index.php: <?php echo $lang['greeting']; ?> greeting turns to Hello World index.php?lang=spanish <?php echo $lang['greeting']; ?> greeting turns to Hola Mundo (I first started with gettext, but it wasn't supported in my shared free hosting Zymic. I didn't want to use Zend_translate, I found it too complicated to my simple task, so I finally ended up using php define, but later on someone told me I should use arrays)

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  • Definition of the job titles involved in a software development process.

    - by Rafael Romão
    I have seen many job titles for people involved in a software development process, but never found a consensus about they mean. I know many of them are equivalent, and found some other questions about that here in SO, but I would like to know your definitions and comments about them. I want not only to know if there is really a consensus, but also to know if what I suppose to be a Software Architect, is really a Software Architect, and so on. The job titles I mean are: Developer; System Analyst; Programmer; Analyst Programmer; Software Engineer; Software Architect; Designer; Software Designer; Business Manager; Business Analyst; Program Manager; Project Manager; Development Manager; Tester; Support Analyst; Please, feel free to add more titles to this list in your answers. It would be very helpful.

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  • Bacula windows client could not connect to Bacula director

    - by pr0f-r00t
    I have a Bacula server on my Linux Debian squeeze host (Bacula version 5.0.2) and a Bacula client on Windows XP SP3. On my network each client can see each other, can share files and can ping. On my local server I could run bconsole and the server responds but when I run bconsole or bat on my windows client the server does not respond. Here are my configuration files: bacula-dir.conf: # # Default Bacula Director Configuration file # # The only thing that MUST be changed is to add one or more # file or directory names in the Include directive of the # FileSet resource. # # For Bacula release 5.0.2 (28 April 2010) -- debian squeeze/sid # # You might also want to change the default email address # from root to your address. See the "mail" and "operator" # directives in the Messages resource. # Director { # define myself Name = nima-desktop-dir DIRport = 9101 # where we listen for UA connections QueryFile = "/etc/bacula/scripts/query.sql" WorkingDirectory = "/var/lib/bacula" PidDirectory = "/var/run/bacula" Maximum Concurrent Jobs = 1 Password = "Cv70F6pf1t6pBopT4vQOnigDrR0v3L" # Console password Messages = Daemon DirAddress = 127.0.0.1 # DirAddress = 72.16.208.1 } JobDefs { Name = "DefaultJob" Type = Backup Level = Incremental Client = nima-desktop-fd FileSet = "Full Set" Schedule = "WeeklyCycle" Storage = File Messages = Standard Pool = File Priority = 10 Write Bootstrap = "/var/lib/bacula/%c.bsr" } # # Define the main nightly save backup job # By default, this job will back up to disk in /nonexistant/path/to/file/archive/dir Job { Name = "BackupClient1" JobDefs = "DefaultJob" } #Job { # Name = "BackupClient2" # Client = nima-desktop2-fd # JobDefs = "DefaultJob" #} # Backup the catalog database (after the nightly save) Job { Name = "BackupCatalog" JobDefs = "DefaultJob" Level = Full FileSet="Catalog" Schedule = "WeeklyCycleAfterBackup" # This creates an ASCII copy of the catalog # Arguments to make_catalog_backup.pl are: # make_catalog_backup.pl <catalog-name> RunBeforeJob = "/etc/bacula/scripts/make_catalog_backup.pl MyCatalog" # This deletes the copy of the catalog RunAfterJob = "/etc/bacula/scripts/delete_catalog_backup" Write Bootstrap = "/var/lib/bacula/%n.bsr" Priority = 11 # run after main backup } # # Standard Restore template, to be changed by Console program # Only one such job is needed for all Jobs/Clients/Storage ... # Job { Name = "RestoreFiles" Type = Restore Client=nima-desktop-fd FileSet="Full Set" Storage = File Pool = Default Messages = Standard Where = /nonexistant/path/to/file/archive/dir/bacula-restores } # job for vmware windows host Job { Name = "nimaxp-fd" Type = Backup Client = nimaxp-fd FileSet = "nimaxp-fs" Schedule = "WeeklyCycle" Storage = File Messages = Standard Pool = Default Write Bootstrap = "/var/bacula/working/rsys-win-www-1-fd.bsr" #Change this } # job for vmware windows host Job { Name = "arg-michael-fd" Type = Backup Client = nimaxp-fd FileSet = "arg-michael-fs" Schedule = "WeeklyCycle" Storage = File Messages = Standard Pool = Default Write Bootstrap = "/var/bacula/working/rsys-win-www-1-fd.bsr" #Change this } # List of files to be backed up FileSet { Name = "Full Set" Include { Options { signature = MD5 } # # Put your list of files here, preceded by 'File =', one per line # or include an external list with: # # File = <file-name # # Note: / backs up everything on the root partition. # if you have other partitions such as /usr or /home # you will probably want to add them too. # # By default this is defined to point to the Bacula binary # directory to give a reasonable FileSet to backup to # disk storage during initial testing. # File = /usr/sbin } # # If you backup the root directory, the following two excluded # files can be useful # Exclude { File = /var/lib/bacula File = /nonexistant/path/to/file/archive/dir File = /proc File = /tmp File = /.journal File = /.fsck } } # List of files to be backed up FileSet { Name = "nimaxp-fs" Enable VSS = yes Include { Options { signature = MD5 } File = "C:\softwares" File = C:/softwares File = "C:/softwares" } } # List of files to be backed up FileSet { Name = "arg-michael-fs" Enable VSS = yes Include { Options { signature = MD5 } File = "C:\softwares" File = C:/softwares File = "C:/softwares" } } # # When to do the backups, full backup on first sunday of the month, # differential (i.e. incremental since full) every other sunday, # and incremental backups other days Schedule { Name = "WeeklyCycle" Run = Full 1st sun at 23:05 Run = Differential 2nd-5th sun at 23:05 Run = Incremental mon-sat at 23:05 } # This schedule does the catalog. It starts after the WeeklyCycle Schedule { Name = "WeeklyCycleAfterBackup" Run = Full sun-sat at 23:10 } # This is the backup of the catalog FileSet { Name = "Catalog" Include { Options { signature = MD5 } File = "/var/lib/bacula/bacula.sql" } } # Client (File Services) to backup Client { Name = nima-desktop-fd Address = localhost FDPort = 9102 Catalog = MyCatalog Password = "_MOfxEuRzxijc0DIMcBqtyx9iW1tzE7V6" # password for FileDaemon File Retention = 30 days # 30 days Job Retention = 6 months # six months AutoPrune = yes # Prune expired Jobs/Files } # Client file service for vmware windows host Client { Name = nimaxp-fd Address = nimaxp FDPort = 9102 Catalog = MyCatalog Password = "Ku8F1YAhDz5EMUQjiC9CcSw95Aho9XbXailUmjOaAXJP" # password for FileDaemon File Retention = 30 days # 30 days Job Retention = 6 months # six months AutoPrune = yes # Prune expired Jobs/Files } # Client file service for vmware windows host Client { Name = arg-michael-fd Address = 192.168.0.61 FDPort = 9102 Catalog = MyCatalog Password = "b4E9FU6s/9Zm4BVFFnbXVKhlyd/zWxj0oWITKK6CALR/" # password for FileDaemon File Retention = 30 days # 30 days Job Retention = 6 months # six months AutoPrune = yes # Prune expired Jobs/Files } # # Second Client (File Services) to backup # You should change Name, Address, and Password before using # #Client { # Name = nima-desktop2-fd # Address = localhost2 # FDPort = 9102 # Catalog = MyCatalog # Password = "_MOfxEuRzxijc0DIMcBqtyx9iW1tzE7V62" # password for FileDaemon 2 # File Retention = 30 days # 30 days # Job Retention = 6 months # six months # AutoPrune = yes # Prune expired Jobs/Files #} # Definition of file storage device Storage { Name = File # Do not use "localhost" here Address = localhost # N.B. Use a fully qualified name here SDPort = 9103 Password = "Cj-gtxugC4dAymY01VTSlUgMTT5LFMHf9" Device = FileStorage Media Type = File } # Definition of DDS tape storage device #Storage { # Name = DDS-4 # Do not use "localhost" here # Address = localhost # N.B. Use a fully qualified name here # SDPort = 9103 # Password = "Cj-gtxugC4dAymY01VTSlUgMTT5LFMHf9" # password for Storage daemon # Device = DDS-4 # must be same as Device in Storage daemon # Media Type = DDS-4 # must be same as MediaType in Storage daemon # Autochanger = yes # enable for autochanger device #} # Definition of 8mm tape storage device #Storage { # Name = "8mmDrive" # Do not use "localhost" here # Address = localhost # N.B. Use a fully qualified name here # SDPort = 9103 # Password = "Cj-gtxugC4dAymY01VTSlUgMTT5LFMHf9" # Device = "Exabyte 8mm" # MediaType = "8mm" #} # Definition of DVD storage device #Storage { # Name = "DVD" # Do not use "localhost" here # Address = localhost # N.B. Use a fully qualified name here # SDPort = 9103 # Password = "Cj-gtxugC4dAymY01VTSlUgMTT5LFMHf9" # Device = "DVD Writer" # MediaType = "DVD" #} # Generic catalog service Catalog { Name = MyCatalog # Uncomment the following line if you want the dbi driver # dbdriver = "dbi:sqlite3"; dbaddress = 127.0.0.1; dbport = dbname = "bacula"; dbuser = ""; dbpassword = "" } # Reasonable message delivery -- send most everything to email address # and to the console Messages { Name = Standard # # NOTE! If you send to two email or more email addresses, you will need # to replace the %r in the from field (-f part) with a single valid # email address in both the mailcommand and the operatorcommand. # What this does is, it sets the email address that emails would display # in the FROM field, which is by default the same email as they're being # sent to. However, if you send email to more than one address, then # you'll have to set the FROM address manually, to a single address. # for example, a '[email protected]', is better since that tends to # tell (most) people that its coming from an automated source. # mailcommand = "/usr/lib/bacula/bsmtp -h localhost -f \"\(Bacula\) \<%r\>\" -s \"Bacula: %t %e of %c %l\" %r" operatorcommand = "/usr/lib/bacula/bsmtp -h localhost -f \"\(Bacula\) \<%r\>\" -s \"Bacula: Intervention needed for %j\" %r" mail = root@localhost = all, !skipped operator = root@localhost = mount console = all, !skipped, !saved # # WARNING! the following will create a file that you must cycle from # time to time as it will grow indefinitely. However, it will # also keep all your messages if they scroll off the console. # append = "/var/lib/bacula/log" = all, !skipped catalog = all } # # Message delivery for daemon messages (no job). Messages { Name = Daemon mailcommand = "/usr/lib/bacula/bsmtp -h localhost -f \"\(Bacula\) \<%r\>\" -s \"Bacula daemon message\" %r" mail = root@localhost = all, !skipped console = all, !skipped, !saved append = "/var/lib/bacula/log" = all, !skipped } # Default pool definition Pool { Name = Default Pool Type = Backup Recycle = yes # Bacula can automatically recycle Volumes AutoPrune = yes # Prune expired volumes Volume Retention = 365 days # one year } # File Pool definition Pool { Name = File Pool Type = Backup Recycle = yes # Bacula can automatically recycle Volumes AutoPrune = yes # Prune expired volumes Volume Retention = 365 days # one year Maximum Volume Bytes = 50G # Limit Volume size to something reasonable Maximum Volumes = 100 # Limit number of Volumes in Pool } # Scratch pool definition Pool { Name = Scratch Pool Type = Backup } # # Restricted console used by tray-monitor to get the status of the director # Console { Name = nima-desktop-mon Password = "-T0h6HCXWYNy0wWqOomysMvRGflQ_TA6c" CommandACL = status, .status } bacula-fd.conf on client: # # Default Bacula File Daemon Configuration file # # For Bacula release 5.0.3 (08/05/10) -- Windows MinGW32 # # There is not much to change here except perhaps the # File daemon Name # # # "Global" File daemon configuration specifications # FileDaemon { # this is me Name = nimaxp-fd FDport = 9102 # where we listen for the director WorkingDirectory = "C:\\Program Files\\Bacula\\working" Pid Directory = "C:\\Program Files\\Bacula\\working" # Plugin Directory = "C:\\Program Files\\Bacula\\plugins" Maximum Concurrent Jobs = 10 } # # List Directors who are permitted to contact this File daemon # Director { Name = Nima-desktop-dir Password = "Cv70F6pf1t6pBopT4vQOnigDrR0v3L" } # # Restricted Director, used by tray-monitor to get the # status of the file daemon # Director { Name = nimaxp-mon Password = "q5b5g+LkzDXorMViFwOn1/TUnjUyDlg+gRTBp236GrU3" Monitor = yes } # Send all messages except skipped files back to Director Messages { Name = Standard director = Nima-desktop = all, !skipped, !restored } I have checked my firewall and disabled the firewall but it doesn't work.

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  • Passing html parameters to server odd problem

    - by StealthRT
    Hey all i am having a weird problem with sending data back to my server. This is the code i am using: NSString *theURL =[NSString stringWithFormat:@"http://www.xxx.com/confirm.asp?theID=%@&theName=%@&empID=%@&theComp=%@", theConfirmNum, tmpNBUserRow.userName, labelTxt.text, theID]; NSLog(@"%@,%@,%@,%@", theConfirmNum, tmpNBUserRow.userName, labelTxt.text, theID); NSMutableURLRequest *request = [[[NSMutableURLRequest alloc] init] autorelease]; [request setURL:[NSURL URLWithString:theURL]]; [request setHTTPMethod:@"POST"]; NSError *error; NSURLResponse *response; NSData *urlData=[NSURLConnection sendSynchronousRequest:request returningResponse:&response error:&error]; NSString *data=[[NSString alloc]initWithData:urlData encoding:NSUTF8StringEncoding]; if ([data isEqualToString:@"Done"]) I can run the code from the browser and it works just fine using the data i got from the NSLog output. The NSLog output for each value is correct. But for some reason when i put a break on the IF ([data isEqualToString:@"Done"]) it has no return value. I checked each value for what it was sending (and again, it was correct in the NSLog output) and i found that the value "theID" said "Out of scope". Although, again, the NSLog had the value in it correctly? So i searched the forum and found a simular problem. I took their advice and added "RETAIN" to the "theID" value like so: theID = [customObjInstance TID]; [theID retain]; However, that did not solve the issue... Here is the console NSLog output: [Session started at 2010-04-11 01:31:50 -0400.] wait_fences: failed to receive reply: 10004003 wait_fences: failed to receive reply: 10004003 nbTxt(5952,0xa0937500) malloc: *** error for object 0x3c0ebc0: double free *** set a breakpoint in malloc_error_break to debug 2010-04-11 01:32:12.270 nbTxt[5952:207] 5122,Rob S.,5122,NB010203 The NSLog values i am sending is the last line "5122,Rob S.,5122,NB010203" Any help would be great :o) David

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  • Clipboard Copy-Paste doesn't work on Win Server 2008/Vista 64bit

    - by Itay Levin
    Hi, I am trying to use Clipboard API (in Delphi) to extract images from Word documents. my code works OK in Windows XP/2003 but in windows 2008 64 bit it doesn't work. in win 2008 i get an error saying that Clipboard.Formats is empty and doesn't contain any format. The image seems to be copied to the Clipboard (i can see it in the clipboard via Word) but when i try to ask the clipboard what format does he have it said it doesn't have any formats. how can i access the clipboard programmatically on win 2008/Vista? from what i know of 2008 64 bit, it might be a security issue... here is the code snippet: This is how i am trying to copy the Image to the clipboard: W.ActiveDocument.InlineShapes.Item(1).Select; // W is a word ole object W.Selection.Copy; and this is how i try to paste it. Clipboard.Open; Write2DebugFile('FormatCount = ' + IntToStr(Clipboard.FormatCount)); // FormatCount=0 For JJ := 1 to Clipboard.FormatCount Do Write2DebugFile('#'+ IntToStr(JJ) + ':' + IntToStr(Clipboard.Formats[JJ])); If (Clipboard.HasFormat(CF_BITMAP)) or (Clipboard.HasFormat(CF_PICTURE)) or (Clipboard.HasFormat(CF_METAFILEPICT)) then // all HasFormat calls returns false. Begin Jpeg := TJPEGImage.Create; Bitmap := TBitmap.Create; Bitmap.LoadFromClipboardFormat(cf_BitMap,ClipBoard.GetAsHandle(cf_Bitmap),0); Jpeg.Assign(Bitmap); Jpeg.SaveToFile(JpgFileN); try Jpeg.Free; except; end; ResizeImage(JpgFileN,750); Write2DebugFile('Saving ' + JpgFileN); End else Write2DebugFile('Doesnt have the right format'); Thanks in advance, Itay

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  • Nested dereferencing arrows in Perl: to omit or not to omit?

    - by DVK
    In Perl, when you have a nested data structure, it is permissible to omit de-referencing arrows to 2d and more level of nesting. In other words, the following two syntaxes are identical: my $hash_ref = { 1 => [ 11, 12, 13 ], 3 => [31, 32] }; my $elem1 = $hash_ref->{1}->[1]; my $elem2 = $hash_ref->{1}[1]; # exactly the same as above Now, my question is, is there a good reason to choose one style over the other? It seems to be a popular bone of stylistic contention (Just on SO, I accidentally bumped into this and this in the space of 5 minutes). So far, none of the usual suspects says anything definitive: perldoc merely says "you are free to omit the pointer dereferencing arrow". Conway's "Perl Best Practices" says "whenever possible, dereference with arrows", but it appears to only apply to the context of dereferencing the main reference, not optional arrows on 2d level of nested data structures. "MAstering Perl for Bioinfirmatics" author James Tisdall doesn't give very solid preference either: "The sharp-witted reader may have noticed that we seem to be omitting arrow operators between array subscripts. (After all, these are anonymous arrays of anonymous arrays of anonymous arrays, etc., so shouldn't they be written [$array-[$i]-[$j]-[$k]?) Perl allows this; only the arrow operator between the variable name and the first array subscript is required. It make things easier on the eyes and helps avoid carpal tunnel syndrome. On the other hand, you may prefer to keep the dereferencing arrows in place, to make it clear you are dealing with references. Your choice." Personally, i'm on the side of "always put arrows in, since itg's more readable and obvious tiy're dealing with a reference".

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  • Embedding a File Explorer instance in a WinForms app form

    - by Unsliced
    My (C#, .NET 3.5) app generates files and, in addition to raising events that can be caught and reacted to, I want to display the target folder to the user in a form. The file-list is being shown within the same form as other information. I'm using an instance of the WebBrowser control (System.Windows.Forms.WebBrowser), then navigating to the folder. This shows some default view of the explorer window, with the file summary panel on the left and the files in the 'Tiles' (large icon and text) view. e.g. wb.Navigate(@"c:\path\to\folder\"); I'd like to suppress the panel and to view the file list in the Details view. The user can get to this via a right-click, context menu, but I'd like it to come up automatically. I'd rather not have to build my own TreeView, DataGridView or whatever; the WebBrowser control does all the updating and re-sorting and whatnot 'for free'. Does anybody have a better suggestion? A different control to use or some additional arguments to pass to the control? And if I could trap events (e.g. files being selected/renamed/double-clicked, etc.) then all the better!

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  • Java and tomcat vs ASP.NET and IIS

    - by Mark Cooper
    Until recently I'd considered myself to be a pretty good web programmer (coming up for 10yrs commercial experience on a variety of e-commerce, static and enterprise applications). I'm self taught and have always used the Microsoft product stack (ASP, ASP.NET)... My applications are always functional, relatively bug free, but have never been lightening quick. As a frequent web user I always found this to be the norm... how fast are the websites from the big tech players (eBay, Facebook, Microsoft, IBM, Dell, Telerik etc etc) - in truth none are particularly fast. I always attributed this to "the way things are with web apps"... ...then I cam across a product called Jira from atlasian and this has stopped me in my tracks... This application is fast, and I mean blindingly fast.. too fast to time the switches between pages, fully live content, lots of images and data and cross references etc etc... I run this on an intranet, with a large application DB, and this is running on a very normal server (single processor, SATA HDD, 8GB RAM). Am I missing something?? Are my programming techniques that bad?? I am wondering if this speed gain is down to it being written in Java and running on Tomcat. Does anyone have any benchmarks to compare JSP / ASP or Tomcat / IIS??? Thanks, Mark NOTE: this isn't a blatant plug for Jira. I don't work for them or have any affiliation to them... but I would like to be able to write applications like them :)

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