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  • Simple pathfinding?

    - by pdx
    Does anyone know if there is a simple way to do pathfinding in PHP? I basically have a list of numbers (kinda like {origin:11485,outboundDirections:"11486,11487,11488"} and {origin:11487,outboundDirections:"11485,11676,94185"} and getting from 11485 to 94185 would result in 11485>11487>94185 with ways to "exixt", and I'm trying to figure out how to do this (it doesn't really have to be shortest path or anything AI-like, just a way to get from A to B) I have no idea where to start at all, unfortunately

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  • safe dereferencing and deletion

    - by serejko
    Hi, I'm relatively new to C++ and OOP in general and currently trying to make such a class that allows to dereference and delete a dead or invalid pointer without any care of having undefined behavior or program fault in result, and I want to ask you is it a good idea and is there something similar which is already implemented by someone else? or maybe I'm doing something completely wrong? I've just started making it and here is the code I currently have: template<class T> class SafeDeref { public: T& operator *() { hash_set<T*>::iterator it = theStore.find(reinterpret_cast<T*>(ptr)); if (it != theStore.end()) return *this; return theDefaultObject; } T* operator ->() { hash_set<T*>::iterator it = theStore.find(reinterpret_cast<T*>(ptr)); if (it != theStore.end()) return this; return &theDefaultObject; } void* operator new(size_t size) { void* ptr = malloc(size * sizeof(T)); if (ptr != 0) theStore.insert(reinterpret_cast<T*>(ptr)); return ptr; } void operator delete(void* ptr) { hash_set<T*>::iterator it = theStore.find(reinterpret_cast<T*>(ptr)); if (it != theStore.end()) { theStore.erase(it); free(ptr); } } protected: static bool isInStore(T* ptr) { return theStore.find(ptr) != theStore.end(); } private: static T theDefaultObject; static hash_set<T*> theStore; }; The idea is that each class with the safe dereference should be inherited from it like this: class Foo : public SafeDeref<Foo> { void doSomething(); }; So... Any advices? Thanks in advance. P.S. If you're wondering why I need this... well, I'm creating a set of native functions for some scripting environment, and all of them use pointers to internally allocated objects as handles to them and they're able to delete them as well (input data can be wrong), so this is kinda protection from damaging host application's memory And I really sorry for my bad English

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  • [VS2008] - Run Add-in from PrebuildEvent

    - by JBL
    I'm writing an VS 2008 add-in to synchronize Setup project Version with startup project assembly version. It works fine. But I was wondering if it was possible to call add-in from the Prebuild Event of my setup project. It works fine by command line window, but I didn't find any syntax to make it work in prebuildEvent. Is Someone has an idea ? Thanks

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  • how do you set a handler for appengine_rpc?

    - by python for ever
    i followed what is said in the article. but still i get these errors: first this warning : No handlers could be found for logger "google.appengine.tools.appengine_rpc" then this error: HTTPError: HTTP Error 500: Internal Server Error anyone has an idea about what i am doing wrong? thanks.

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  • SQL Server replication question.

    - by schar
    I had inherited this SQL Server where we put data in a table (Call TableA) on a database (DB-A). I can see the tableA in another database on the same server ( DB-B) gets the same data right away. Any ideas how this is implemented? I am trying to see the trace but so far no luck. Any one has an idea? At this stage I am not sure if its replication. This is a guess

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  • Achiving HighAvailability using Terracotta

    - by sjain
    Hi I am having one applications and I have to implement failover using terracotta.I have gone through the Documentation of terracotta.org for websession.I even run the provided examples but I am not getting any idea to use that with my application.

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  • when is the right time to draw

    - by stupid_idiot
    hi i just finished essential part of my own personal 2d engine in c++ and i'm kinda deciding how to complete the part where it is actually supposed to display everything on the screen, namely when do I call that function which does the job. I don't have much idea of how does the graphic card work, my biggest experience is calling bios graphic services to write some stuff on the screen. Could you give me a hint on this pls? Or maybe some keywords I should try to google?

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  • cycle through list, change style every x seconds

    - by kjarsenal
    I have a simple slideshow (jQuery Cycle) that displays an image every ten seconds (7 total images). In an adjacent div, I have a list with 7 bullet points. What's the easiest way to script a method in which the css/style of the appropriate bullet point changes as its accompanying image. The idea is to have all list items displayed, but 1 highlighted every 10 seconds?

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  • Doing sum's if certain conditions are true

    - by Gugu
    I am trying to build a query that does a sum if a certain parameter is set. For example: SELECT SUM(IF(<condition>,field,field)) AS total_value ...which is working correctly. But i have more than one condition in IF(), like: SELECT SUM(IF(<condition> <condition>,field,field)) AS total_value ..which is not working, could you have any idea what should be the right query for this.

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  • Data structure in C# (3.0) that represents a CUBE

    - by Thinking
    Can you please give me some idea about how to design a data structure in C# (3.0) which will give a representation of 3D data structure. I mean to say something similar to cube. Like stock data to be viewed based on time , location . Kindly give a simple working example or even a link will do. It's urgent. Any example will be appreciated. Thanks in advance

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  • Sending multiple checkbox options

    - by Grunje_D_D
    Hi, I'm creating a used cars website (written in PHP), and I'm stuck on sending advanced search options from form. I have more than 30 of them and I wonder if it's possible, and how, to send them in one variable (for example &options=1,2,3,5,6,10 or some other way..). Also I've heard that this is possible with "bitwise" but I don't have a clue how to do that. Or if someone have a better idea, please let me know. Thanx

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  • PHP $array[0] in $string for JSON

    - by user1907696
    I am trying to use PHP to make a JSON file. Part of the code is as follow $array = array("hello", "world"); $string='{"person": [ { "name":'$array[0];', "age":'$array[1];' } ] }'; The file created. However, $array[0] and $array[1] doesn't return the values "hello" and "world" but as $array[0] and $array[1] Any idea? Thanks

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  • How to pass a variable to a IN clause?

    - by Thanu
    Lets say I have a SP that has a SELECT statements as follows, SELECT product_id, product_price FROM product WHERE product_type IN ('AA','BB','CC'); But data goes to that IN clause must be through a single variable that contains the string of values. Something link below SELECT product_id, product_price FROM product WHERE product_type IN (input_variables); But its not working that way. Any idea how to do this?

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  • Using .htaccess to change my website URLs

    - by James P
    I have some pages organised like this: http://localhost/index.html http://localhost/download.html http://localhost/contact.html And I need them changed to suit the following URL structure: http://localhost/ http://localhost/download http://localhost/contact Without making sub directories and putting in pages as index.html. As far as I know .htaccess can be used for this, but I have no idea what I need to add to my .htaccess file to make this work. Can anyone provide some help? Thanks.

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  • How to "scan" a website (or page) for info, and bring it into my program?

    - by James
    Well, I'm pretty much trying to figure out how to pull information from a webpage, and bring it into my program (in Java). For example, if I know the exact page I want info from, for the sake of simplicity a Best Buy item page, how would I get the appropriate info I need off of that page? Like the title, price, description? What would this process even be called? I have no idea were to even begin researching this.

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  • Java 1.7ea: Files.probeContentType(path) returns null

    - by Cybertizzen
    Hi, I'm having a bit of a strange problem with an application using the Files.probeContentType(path)-method to test for file type: On both my Ubuntu and Fedora systems, it works fine, but when moved to a RedHat Enterprise server (2.6.18-194.el5 #1 x86_64 x86_64 x86_64 GNU/Linux), it only returns null. I'm using java 7 early access (1.7.0-ea-b84). I have to use this version due to functionality that isn't included in 1.6. Does anyone have an idea of what might be the problem here?

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  • Moving a UIIMageView outside of a UIScrollView

    - by user359570
    Hello, At the bottom part of my main UIView, I've an UIScrollView with an UIImageView inside. I'd like to move the UIIMageView from the UIScrollView to the top part of my UIView. I'm able to move my UIImageView inside the UIScrollView, but outside, I can't. The UIImageView remains in the UIScrollView, it's parent. Any idea? Thanks in advance for any help. Best regards, Alx

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