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  • C++: Chr() and unichr() equivalent?

    - by alex
    I could have sworn I used a chr() function 40 minutes ago but can't find the file. I know it can go up to 256 so I use this: std::string chars = ""; chars += (char) 42; //etc So that's alright, but I really want to access unicode characters. Can I do (w_char) 512? Or maybe something just like the unichr() function in python, I just can't find a way to access any of those characters.

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  • Java if/else behaving strangely

    - by Alex
    I'm a real newbie to java, so please excuse me if this is a hopelessly straightforward problem. I have the following from my java game server: // Get input from the client DataInputStream in = new DataInputStream (server.getInputStream()); PrintStream out = new PrintStream(server.getOutputStream()); disconnect=false; while((line = in.readLine().trim()) != null && !line.equals(".") && !line.equals("") && !disconnect) { System.out.println("Received "+line); if(line.equals("h")){ out.println("h"+EOF); // Client handshake System.out.println("Matched 1"); }else if (line.equals("<policy-file-request/>")) { out.println("..."+EOF); // Policy file System.out.println(server.getInetAddress()+": Policy Request"); disconnect=true; System.out.println("Matched 2"); }else if(line.substring(0,3).equals("GET")||line.substring(0,4).equals("POST")){ out.println("HTTP/1.0 200 OK\nServer: VirtuaRoom v0.9\nContent-Type: text/html\n\n..."); // HTML status page disconnect=true; System.out.println("Matched 3"); } else { System.out.println(server.getInetAddress()+": Unknown command, client disconnected."); disconnect=true; System.out.println("Matched else"); } } server.close(); First of all, the client sends an "h" packet, and expects the same back (handshake). However, I want it to disconnect the client when an unrecognised packet is received. For some reason, it responds fine to the handshake and HTML status request, but the else clause is never executed when there's an unknown packet. Thanks

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  • How to provide warnings during validation in ASP.NET MVC?

    - by Alex
    Sometimes user input is not strictly invalid but can be considered problematic. For example: A user enters a long sentence in a single-line Name field. He probably should have used the Description field instead. A user enters a Name that is very similar to that of an existing entity. Perhaps he's inputting the same entity but didn't realize it already exists, or some concurrent user has just entered it. Some of these can easily be checked client-side, some require server-side checks. What's the best way, perhaps something similar to DataAnnotations validation, to provide warnings to the user in such cases? The key here is that the user has to be able to override the warning and still submit the form (or re-submit the form, depending on the implementation). The most viable solution that comes to mind is to create some attribute, similar to a CustomValidationAttribute, that may make an AJAX call and would display some warning text but doesn't affect the ModelState. The intended usage is this: [WarningOnFieldLength(MaxLength = 150)] [WarningOnPossibleDuplicate()] public string Name { get; set; } In the view: @Html.EditorFor(model => model.Name) @Html.WarningMessageFor(model => model.Name) @Html.ValidationMessageFor(model => model.Name) So, any ideas?

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  • What binary architectures should be cross-compiled when building Mac OS X packages?

    - by Alex Leach
    Currently, Apple's native binaries and libraries are distributed as fat files, with support for both i386 and x86_64 architectures. The SDK (Xcode 4.4 w/ command line tools) doesn't support cross-compiling powerpc binaries any more, so they can be safely ignored I think, but there doesn't seem to be any specific guidelines or recommendations about which Intel architectures to support. So, when compiling code for distribution on OS X, do people still cross-compile for the i386 architecture? Or are x86_64 binaries the only architecture worth bothering with nowadays?

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  • How to Check Authenticity of an AJAX Request

    - by Alex Reisner
    I am designing a web site in which users solve puzzles as quickly as they can. JavaScript is used to time each puzzle, and the number of milliseconds is sent to the server via AJAX when the puzzle is completed. How can I ensure that the time received by the server was not forged by the user? I don't think a session-based authenticity token (the kind used for forms in Rails) is sufficient because I need to authenticate the source of a value, not just the legitimacy of the request. Is there a way to cryptographically sign the request? I can't think of anything that couldn't be duplicated by a hacker. Is any JavaScript, by its exposed, client-side nature, subject to tampering? Am I going to have to use something that gets compiled, like Flash? (Yikes.) Or is there some way to hide a secret key? Or something else I haven't thought of? Update: To clarify, I don't want to penalize people with slow network connections (and network speed should be considered inconsistent), so the timing needs to be 100% client-side (the timer starts only when we know the user can see the puzzle). Also, there is money involved so no amount of "trusting the user" is acceptable.

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  • Can an iframe pop up a Lightbox-style box?

    - by Alex
    Hi. This question isn't about popping up an iframe inside a Lightbox; rather, it's about an iframe on a page that can launch its own Lightbox-style box in the page that contains that iframe. I'm thinking this can't be possible, because the iframe contains the contents of the other URL and whatever Lightbox that URL launches has to fit within the iframe. Thanks.

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  • Inserting and removing a string into/from an array

    - by alex
    Hello all! I have an array and variable. If the variable does not exist in the array it has to be added, otherwise it has to be removed. Why the following code does not work? $ar = ["a","b","c"]; $vr = "b"; foreach ($ar as $i => $value) { if ($value == $vr) { unset ($ar[$i]); } else { $ar[] = $vr; $ar = array_unique($ar); } } Thanks.

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  • Why 10675199.02:48:05.4775807 TimeSpan Maximum for CompilationSection?

    - by Alex
    I was looking at the metadata for System.Web.Configuration.CompilationSection, and noticed the following attribute on the TimeSpan BatchTimeout property: [TimeSpanValidator(MinValueString = "00:00:00", MaxValueString = "10675199.02:48:05.4775807")] Could someone explain why this is the allowed max value? TimeSpan itself has an upper limit, so why would there be another value validation, and why this number?

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  • TypoScript: {field:uid} replacement not working | Different CSS class per menu item

    - by Alex
    I have a header menu and try to define different CSS classes for each item. This is what I have: 20 = HMENU 20 { special = directory special.value = 107 1 = TMENU 1 { wrap = <ul class="foo" id="mymenu">|</ul> expAll = 1 NO = 1 NO.allWrap = <li class="first menu_{field:uid}">|</li> || <li class="menu_{field:uid}">|</li> || <li class="last menu_{field:uid}">|</li> } } But in the HTML output I simply get class="first menu_{field:uid}" and nothing is replaced.

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  • Is there any way I can use two monitors in the console in Linux?

    - by Alex
    I have recently become the proud owner of two monitors in my workspace. (Ok not owner, but you know what I mean) and I'd like to use both of them at once. Problem is, I much much prefer to use a Linux Server console over a desktop environment. The graphics card on the machine is a GTX295 (don't ask why, it's a long story.) so I essentially have two graphics cards. Each has a DVI output. Is there any way I can get the console to stretch across two screens? Or will I have to install a desktop Ubuntu for this to work?

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  • How to exit a process run with Ruby if it takes more than 5 seconds?

    - by Alex
    I'm implementing a checking system in Ruby. It runs executables with different tests. If the solution is not correct, it can take forever for it to finish with certain hard tests. That's why I want to limit the execution time to 5 seconds. I'm using system() function to run executables: system("./solution"); .NET has a great WaitForExit() method, what about Ruby?. Is there a way to limit external process' execution time to 5 seconds? Thanks

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  • Would this Jquery selector work?

    - by Alex
    Hi all, would the following Jquery selector get all of the 4th td elements of all the tables on the current page, and return their text as an array?: var isbn = $.makeArray($("table tr td:nth-child(4)").text());

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  • programing logic and design plzzzzzzzzz help [closed]

    - by alex
    `*the midvile park maintains records containing info about players on it's soccer teams . each record contain a players first name,last name,and team number . the team are team number team name 1 goal getters 2 the force 3 top gun 4 shooting stars 5 midfield monsters design a proggram that accept player data and creates a report that lists each player along with his or her team number and team name

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  • How to customize preferences screen theme to look like that ?

    - by Alex
    Ok, I have a Preferences activity set with an XML layout. Here I have a couple of Preferences that open some dialogs. On these preferences I want to have an arrow on the right of them like in the screenshot. How I do this, is something related to the theme ? First screenshot is how I want to look, second is what I have now. http://img545.imageshack.us/i/screenshot1zlk.png/ http://img405.imageshack.us/i/tsc3.png/

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  • Sending floating point values between processes with pipes in C

    - by Alex
    Is there a standard way of sending floating point values from a child process to a parent process in C. I have a some calculations where I want to fork a process, then have the child do some busy work, the parent do something else, and then the child send its values (which are doubles) back to the parent (presumably through a pipe). Clearly the parent could parse the stream, but I'm just wondering if there's a cleaner way?

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  • jQuery $.getJSON: "Failed to load resource: cancelled"

    - by Alex
    I'm having problem loading a json resource from a local rails app with jQuery 1.4.4 The json is valid (based on jsonlint.com) and I can download it properly if I'm requesting it from other sources. In webkit (Safari), I got this error: Failed to load resource: cancelled Response Header on Firebug: Content-Type application/json; charset=utf-8 Set-Cookie geoloc=toulouse; path=/; Connection close Server thin 1.2.7 codename No Hup jQuery code to load json: $.getJSON("http://127.0.0.1/search_agenda", {'edition': edition, 'categories': categories}, function(data){ console.log(data); } });

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  • A non-ugly way to persist dialog contents across orientation changes?

    - by alex
    So I have a managed AlertDialog with a number of EditTexts & separate portrait + landscape layouts. The user opens the dialog in portrait mode, enters some text and then all of a sudden decides to pop out the keyboard. Now, I need to remove the dialog and recreate it for the changed layout persisting the text entered. What I can think of is getting references to the EdiTexts in onPrepareDialog(..), then getting the actual text in onConfigurationChanged(..), then removing the dialog, then showing it again, then populating it. Rather ugly, huh? Are there any better options?

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  • Having Issues with a utility app...

    - by Alex
    How do I accept data on the backside of a utility app, and then how do I let users modify that data? I've tried all sorts of tutorials, but to no avail. If you need further information let me know. Thanks in advanced.

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  • Batch save in CastleProject ActiveRecord

    - by Alex
    I need to save thousand of records in a database. I am using CastleProject ActiveRecord. The cycle which stores that amount of objects works too long. Is it possible to run saving in a batch using ActiveRecord? What is recommended way to improve performance?

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