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  • Debugging embedded Lua

    - by Caspin
    How do you debug lua code embedded in a c++ application? From what I gather, either I need to buy a special IDE and link in their special lua runtime (ugh). Or I need to build a debug console in to the game engine, using the lua debug API calls. I am leaning toward writing my own debug console, but it seems like a lot of work. Time that I could better spend polishing the other portions of the game.

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  • HttpServletRequest.getServerName() occasionally returning null in concurrent use?

    - by oconnor0
    Under JBoss 4.0.1SP1, I have a servlet that makes multiple, concurrent calls to web services that are running under the same instance. I'm using request.getServerName() (on HttpServletRequest) to construct the endpoint URL. This normally works fine, but every once in a while returns null. I hadn't seen this before running the web service requests in parallel, and so I guessed that sharing the HttpServletRequest among threads won't always work or something. Any ideas on fixing this?

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  • Looking a lightweight PHP ORM

    - by allenskd
    At first I was going to use doctrine ORM as the main one but it was an overkill, unneeded features and probably excessive calls. One of the main reasons was the "helper" that handled traverse trees (the hierarchy tree) easily but I'm starting to prefer building my own class. This is what I'm looking for: 1) Can manage multiple database connections, (sort of like doctrine manager) 2) Models 3) flexible All suggestions are welcome

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  • Grails domain class event listner in service level

    - by BlackPanther
    Hi , I want to interrupt some specific grails domain class events(read,write,delete,update).Is there any hibernate eventlistner available for grails domain classes.So that all the calls will go through that eventslistner.I tried following def beforeLoad={}, def beforeInsert={} ,etc ..Other than that is there any other way something can be done in service level? Thanks

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  • Can simple javascript inheritance be simplified even further?

    - by Will
    John Resig (of jQuery fame) provides a concise and elegant way to allow simple JavaScript inheritance. It was so short and sweet, in fact, that it inspired me to try and simplify it even further (see code below). I've modified his original function such that it still passes all his tests and has the potential advantage of: readability (50% less code) simplicity (you don't have to be a ninja to understand it) performance (no extra wrappers around super/base method calls) consistency with C#'s base keyword Because this seems almost too good to be true, I want to make sure my logic doesn't have any fundamental flaws/holes/bugs, or if anyone has additional suggestions to improve or refute the code (perhaps even John Resig could chime in here!). Does anyone see anything wrong with my approach (below) vs. John Resig's original approach? if (!window.Class) { window.Class = function() {}; window.Class.extend = function(members) { var prototype = new this(); for (var i in members) prototype[i] = members[i]; prototype.base = this.prototype; function object() { if (object.caller == null && this.initialize) this.initialize.apply(this, arguments); } object.constructor = object; object.prototype = prototype; object.extend = arguments.callee; return object; }; } And the tests (below) are nearly identical to the original ones except for the syntax around base/super method calls (for the reason enumerated above): var Person = Class.extend( { initialize: function(isDancing) { this.dancing = isDancing; }, dance: function() { return this.dancing; } }); var Ninja = Person.extend( { initialize: function() { this.base.initialize(false); }, dance: function() { return this.base.dance(); }, swingSword: function() { return true; } }); var p = new Person(true); alert("true? " + p.dance()); // => true var n = new Ninja(); alert("false? " + n.dance()); // => false alert("true? " + n.swingSword()); // => true alert("true? " + (p instanceof Person && p instanceof Class && n instanceof Ninja && n instanceof Person && n instanceof Class));

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  • Purpose of Explicit Default Constructors

    - by Dennis Zickefoose
    I recently noticed a class in C++0x that calls for an explicit default constructor. However, I'm failing to come up with a scenario in which a default constructor can be called implicitly. It seems like a rather pointless specifier. I thought maybe it would disallow Class c; in favor of Class c = Class(); but that does not appear to be the case. Some relevant quotes from the C++0x FCD, since it is easier for me to navigate [similar text exists in C++03, if not in the same places] 12.3.1.3 [class.conv.ctor] A default constructor may be an explicit constructor; such a constructor will be used to perform default-initialization or value initialization (8.5). It goes on to provide an example of an explicit default constructor, but it simply mimics the example I provided above. 8.5.6 [decl.init] To default-initialize an object of type T means: — if T is a (possibly cv-qualified) class type (Clause 9), the default constructor for T is called (and the initialization is ill-formed if T has no accessible default constructor); 8.5.7 [decl.init] To value-initialize an object of type T means: — if T is a (possibly cv-qualified) class type (Clause 9) with a user-provided constructor (12.1), then the default constructor for T is called (and the initialization is ill-formed if T has no accessible default constructor); In both cases, the standard calls for the default constructor to be called. But that is what would happen if the default constructor were non-explicit. For completeness sake: 8.5.11 [decl.init] If no initializer is specified for an object, the object is default-initialized; From what I can tell, this just leaves conversion from no data. Which doesn't make sense. The best I can come up with would be the following: void function(Class c); int main() { function(); //implicitly convert from no parameter to a single parameter } But obviously that isn't the way C++ handles default arguments. What else is there that would make explicit Class(); behave differently from Class();? The specific example that generated this question was std::function [20.8.14.2 func.wrap.func]. It requires several converting constructors, none of which are marked explicit, but the default constructor is.

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  • How does fork() return for son process

    - by EpsilonVector
    I know htat fork() returns differently for the son and father processes, but I'm unable to find information on how this happens. How does the son process receives the return value 0 from fork? And what is the difference in regards to the call stack? As I understand it, for the father it goes something like this: father process--invokes fork--system_call--calls fork--fork executes--returns to--system_call--returns to--father process. What happens in the son side?

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  • pretty print makefiles

    - by wickedchicken
    The linux kernel (and various other projects including git) have very nice makefiles that hide the giant cc calls into nice little acronyms. For example: gcc -O2 -o cool.o cool.c -llib gcc -O2 -o neat.o neat.c -llib would become: CC cool.c CC neat.c Which is really nice if you have a project with a large number of files and long compiler flags. I recall that this had to do with suppressing the default output and making a custom one. How do you do it?

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  • Processor affinity settings for Linux kernel modules?

    - by Stephen Pape
    In Windows, I can set the processor affinity of driver code using KeSetSystemAffinityThread, and check which processor my code is running on using KeGetCurrentProcessorNumber. I'm trying to do something similar in a Linux kernel module, but the only affinity calls I can see are for userland processes. Is there any way to do this, so that I can run assembly code on a specific processor? (i.e. sgdt)

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  • Cache front end for the JetS3t API

    - by Joshua
    Storage via JetS3t REST API seems to be very slow. Is there a caching front end for the JetS3t API for avoiding a network hit on the fetch calls [link text][1] [1]: http://jets3t.s3.amazonaws.com/api/org/jets3t/service/S3Service.html#getObject(org.jets3t.service.model.S3Bucket, java.lang.String, java.util.Calendar, java.util.Calendar, java.lang.String[], java.lang.String[], java.lang.Long, java.lang.Long)

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  • Working with processes in C

    - by Gary
    Hi, just a quick question regarding C and processes. In my program, I create another child process and use a two-directional pipe to communicate between the child and parent. The child calls execl() to run yet another program. My question is: I want the parent to wait n amount of seconds and then check if the program that the child has run has exited (and with what status). Something like waitpid() but if the child doesn't exit in n seconds, I'd like to do something different.

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  • Can I have a macro in Visual Studio 2005 call a DOS command and redirect the output to a file?

    - by Mark
    I'd like to have a macro in Visual Studio 2005 that calls a DOS command and redirects the output (stdout and stderr) to a file. Just calling the command and "" redirecting it will not capture stderr, so there are two parts to this: calling a DOS command capturing both stderr and stdout to a file during that call I'd then like to open this file in Visual Studio after the command completes. I'm new to Visual Studio 2005 macro writing, and VB/VBA, so that's the kind of help that I'm looking for. Thanks, Mark

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  • My abstract class implements an interface but doesn't implement some of its methods. How do I make i

    - by Stefan Monov
    interface ICanvasTool { void Motion(Point newLocation); void Tick(); } abstract class CanvasTool_BaseDraw : ICanvasTool { protected abstract void PaintAt(Point location); public override void Motion(Point newLocation) { // implementation } } class CanvasTool_Spray : CanvasTool_BaseDraw { protected abstract void PaintAt(Point location) { // implementation } public override void Tick() { // implementation } } This doesn't compile. I could add an abstract method "Tick_Implementation" to CanvasTool_BaseDraw, then implement ICanvasTool.Tick in CanvasTool_BaseDraw with a one-liner that just calls Tick_Implementation. Is this the recommended workaround?

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  • Is there a more clear way to write out multiple functions that are part of an object?

    - by Gemma
    I have the following: $scope.modalReset = function () { gridService.modalReset($scope); } $scope.rowAction = function (action, row) { gridService.rowAction(action, $scope, row, 'Question'); } $scope.submitItem = function (formData) { gridService.submitItem($scope, 'Question', formData); } Is there a way that these function calls could be written more simply. I am not looking to combine them. There are all functions that are part of the scope object.

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  • flXHR - getting started (a simple question)

    - by Yaron
    Hello, I am trying to use the flXHR javascript library for making cross-domain calls. I got stuck at the begining. As they say in the docs, I copied the /deploy directory's content to a /scripts directory. All the dependencies are supposed to be included in the flXHR download. This is my html, which returns several errors: the errors: y.base_path is undefined y.checkplayer is undefined y.ua is undefined E.attachEvent is not a function thanks

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  • Hooks in ghostscript

    - by anon
    Anyone know the right places to hook into ghostscript, so that when interpreting a ps file, I can get logs of all calls of the form: draw_character(float x, float y, string font_name, int char_id); ? Basically I want to take a postscript file, and get a list of where all characters are drawn to the screen. Thanks!

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  • What Language is This?

    - by bobber205
    Going through some example code sent to me and honestly, I have no idea what language this is def uniqify(arr): b = {} for i in arr: b[i] = 1 return b.keys() Is it Python? I am also curious what keys() does. It's obvious it returns an array but what does it do the array that calls the function? :P

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  • BoundsChecker shows incorrect memory leak message

    - by Prabhu
    Hello All, I'm using BoundsChecker9.1 with visual c++. I have a class class Sample{ public: vector(AnotherClass) x; }. When I run my program the BoundsChecker tool reports all push_back() calls such as S.x.push_back(AnotherClass()) as memory leak.. Wouldn't all the elements in vector x will always be deallocated when the Sample class goes out of scope? If so, any idea about why BoundsChecker is showing them as memory leak?

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  • How to not write the full url in javascript ?

    - by Axel
    Hi, I did a Mod rewrite for my website so the URLs looks like this : http://www.mydomain.com/health/54856 http://www.mydomain.com/economy/strategy/911025/ http://www.mydomain.com/tags/obama/new So, the problem is that i make AJAX calls to a file here : http://www.mydomain.com/login.php And i don't want to write the FULL url or even use ../ trick because there isn't a fixed number of folders. So, what i want now, is something worked for my code to access the login.php from the root whatever the domain name is : $.ajax({ type: "POST", url: "http://www.mydomain.com/login.php" });

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  • Job queue manager with RPC interface

    - by admr
    I need a job queue manager that I can control over the Internet. It should be able to execute and stop processes, check on their status (ideally notice and execute some code when a process exits), respond to commands and also be able to report back to a server. Background: I have a GWT application that allows to create jobs to execute on a cloud instance (currently EC2). I want to push a "job packet" (data for a process to operate on etc) to S3, start a Linux EC2 instance (or use one that's already running), and tell a job manager on the instance to execute that job (possibly parallel to other jobs). It should then pull the "job packet" from S3, run a process that operates on that data and report back to the server that is running the server part of my GWT application with some information (e.g. exit code, stdout, stderr). If I have to write e.g. stdour/err to a file from the process and read that file, that's OK too. I would really like the manager to be "close" to the processes it runs, meaning I want to avoid using something like Runtime.exec from the JDK. It seems like I would have to do that if I used Quartz for example. I'm fine with the calls in both directions being asynchronous. I'm fine with any reasonable technology for the calls as long as I can easily build an interface for that in my GWT server side (e.g. HTTP requests to a servlet over SSL would be nice and trivial). The job manager does not need to have a very sophisticated queueing system. Running several processes either sequentially or in parallel should be fine. Determining how much compute time a process received during its lifetime would be nice (AFAIK, this might be challenging). I did not yet find any existing software that does this, including http://java-source.net/open-source/job-schedulers. I suspect I might have to build an RPC interface (with authentication etc, of course) around a job manager; maybe use something like Apache Commons Exec. In that case, I would prefer Java or Python for the job manager part. I would be happy to hear suggestions for either the former or latter scenario!

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