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• creating 2d sprites for games ?

  - by dfafa

  i am pretty new to developing games...i thought i would begin by making a simple 2d game.... curious what tools are commonly used to transform images to pixel sprites ? or is this done by hand, if so what tools are used ? even better, is there a marketplace where i can purchase game sprites and other game assets ?

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• NSTimer as a self-targeting ivar.

  - by Matt Wilding

  I have come across an awkward situation where I would like to have a class with an NSTimer instance variable that repeatedly calls a method of the class as long as the class is alive. For illustration purposes, it might look like this: // .h @interface MyClock : NSObject { NSTimer* _myTimer; } - (void)timerTick; @end - // .m @implementation MyClock - (id)init { self = [super init]; if (self) { _myTimer = [[NSTimer scheduledTimerWithTimeInterval:1.0f target:self selector:@selector(timerTick) userInfo:nil repeats:NO] retain]; } return self; } - (void)dealloc { [_myTimer invalidate]; [_myTImer release]; [super dealloc]; } - (void)timerTick { // Do something fantastic. } @end That's what I want. I don't want to to have to expose an interface on my class to start and stop the internal timer, I just want it to run while the class exists. Seems simple enough. But the problem is that NSTimer retains its target. That means that as long as that timer is active, it is keeping the class from being dealloc'd by normal memory management methods because the timer has retained it. Manually adjusting the retain count is out of the question. This behavior of NSTimer seems like it would make it difficult to ever have a repeating timer as an ivar, because I can't think of a time when an ivar should retain its owning class. This leaves me with the unpleasant duty of coming up with some method of providing an interface on MyClock that allows users of the class to control when the timer is started and stopped. Besides adding unneeded complexity, this is annoying because having one owner of an instance of the class invalidate the timer could step on the toes of another owner who is counting on it to keep running. I could implement my own pseudo-retain-count-system for keeping the timer running but, ...seriously? This is way to much work for such a simple concept. Any solution I can think of feels hacky. I ended up writing a wrapper for NSTimer that behaves exactly like a normal NSTimer, but doesn't retain its target. I don't like it, and I would appreciate any insight.

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• Akamai charge questions

  - by Dhana

  I am wondering if anyone has an simple answer to this. If you hit an Akamai server for an image, but the response is returned with a 304 code instead of a 200, does Akamai charge for the call since no data is returned with a 304 and image is served from the browser cache?

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• ASP.NET csv excel issue with strange characters

  - by cfdev9

  I'm exporting a table of data to csv format, eg "COL1","COL2","COL3" "1","some text", "£232.00" "2","some more text", "£111.00" "3","other text", "£2.00" The code to export is fairly simple using an ashx handler context.Response.Clear() context.Response.ContentType = "text/csv" context.Response.AddHeader("Content-disposition", "attachment;filename=data.csv") context.Response.AddHeader("Cache-Control", "must-revalidate") context.Response.AddHeader("Pragma", "must-revalidate") context.Response.Write(data) context.Response.Flush() context.Response.End() My issue is when excel trys to open the exported file the character  appears before all £ signs, eg £232.00 when the value should be £232.00

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• CGRect in C code

  - by Leif Andersen

  A simple google search for: CGRect + C or CGRect in C brings back only Apple, iPhone, and Objective-C websites. However, I remember hearing that Core Graphics was part of C at my university. Did I hear incorrectly, or is CGRect something that I can use in C, or even C++ as it's Object oriented?

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• Problem of * in Command line argument

  - by Nithya

  Hi, This is simple question only... i did a program in java that accepts input via command line arguments. I get input of two numbers and operator in command line. multiplying two numbers, i have to give input as 5 3 *. But if i give like this, i cant get answer. Y its not accept * in cmd.... waiting for reply guys...

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• Result set mapping in Grails / GORM

  - by armandino

  I want to map the result of a native SQL query to a simple bean in grails, similar to what the @SqlResultSetMapping annotation does. For example, given a query select x.foo, y.bar, z.baz from //etc... map the result to class FooBarBaz { String foo String bar String baz } Can anyone provide an example of how to do this in grails? Thanks in advance.

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• Data transmission through USB

  - by ASHOK

  I want to develop code to transmit data from system to PIC through USB. Can anybody give good link regarding data transmission through USB. because i am new to this. NOTE: Very simple is code is enough to me. Thanks in Advance

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• Rendering a value as text instead of field inside a Django Form

  - by amdfan

  Is there a simple way to make Django render {{myform.name}} as John Smith instead of <input id="id_name" name="name" value="John Smith" /> inside <form> tags? Or am I going about this the wrong way?

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• How to do a join that removes values?

  - by Georg

  Customers Holidays id | name customer_id | start | end ---+------ ------------+--------+------ 1 | Peter 1 | 5 | 10 2 | Simon 1 | 15 | 20 3 | Mary 2 | 5 | 20 How should my SQL query look that out of start=11,end=14 I get these customers: Peter Mary Is this even manageable with a simple SQL join, or do I need to use sub-queries?

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• Scrape data from HTML pages using Java, output to database

  - by Tanith

  I need to know how to create a scraper (in Java) to gather data from HTML pages and output to a database...do not have a clue where to start so any information you can give me on this would be great. Also, you can't be too basic or simple here...thanks :)

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• Best Practices - log in stored procedures?

  - by hgulyan

  If you have a long running SP, do you log somehow it's actions or just wait for this message? "Command(s) completed successfully." I assume, that there can be plenty solutions on this subject, but is there any best practice - a simple solution that is frequently used?

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• Shortest Path algorithm of a different kind

  - by Ram Bhat

  Hey guys, Lets say you have a grid like this (made randomly) Now lets say you have a car starting randomly from one of the while boxes, what would be the shortest path to go through each one of the white boxes? you can visit each white box as many times as you want and cant Jump over the black boxes. The black boxes are like walls. In simple words you can move from white box to white box only.. You can move in any direction, even diagonally.

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• run jsf application with myeclipse and jboss server

  - by chetan

  I develop simple jsf login application,that use icefaces component but, when I tries to run it in jboss server I got following error. Can't find TLD for location [http://java.sun.com/jsf/core]. JAR containing the TLD may not be in the classpath Can't find TLD for location [http://java.sun.com/jsf/html]. JAR containing the TLD may not be in the classpath

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• Ajax in UserControl

  - by nader

  Hi i have a signup page and i want to check username exists or not with ajax <%@ Control Language="C#" AutoEventWireup="true" CodeFile="Simple.ascx.cs" Inherits="UserControls_Simple" %> ??? ??????: ???? ???? i eant to show label if user exists how can i do that? tnx

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• Can i use jmonkeyengine on android?

  - by Ralf

  Hi, i', trying to make a simple 3d game for android, and i want to use jmonkeyengine, Can i do this? How can i do it? Someboy can show me an example? thanks!!!

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• Iterate Multi-Dimensional Array with Nested Foreach Statement

  - by Tyler Murry

  I think this might be a pretty simple question, but I haven't been able to figure it out yet. If I've got a 2-dimensional array like so: int[,] = new int[2,3] { {1, 2, 3}, {4, 5, 6} }; What's the best way to iterate through each dimension of the array with a nested foreach statement?

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• How to elegantly create a datatable with Django ?

  - by Inshim

  Here's a common situation that I have and wish to avoid creating tedious loops and fiddling with html tables: I have a model Movie, which is has fkeys to Director and to Genre. How can I elegantly render a simple data table that has on one axis the different Directors, on another axis the different Genres, and inside each cell the count of the movies filtered by the respective Director and Genre? Thanks!

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• How to link Poco library(libraries) to our program in unix environment

  - by SepiDev

  Hi, i'm having trouble with Poco libraries. I need a simple solution to make the compilation easier. Is there any pkg-config file for Poco library to use it into our make files? Or any alternative solution? Currently i use Ubuntu gnu/linux.

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• Writing an OS kernel in assembly with NASM

  - by Betamoo

  I want to know what is the standard way for writing a -simple- kernel to be compiled on NASM? To get it clearer: I was able to define the code block with all the following ways: [segment code] [segment .code] segment code segment .code [section code] [section .code] section code section .code I need to know what is the standard way to do that, And what is the difference between them... Thanks

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• Operations on Python hashes

  - by cdecker

  I've got a rather strange problem. For a Distributed Hash Table I need to be able to do some simple math operations on MD5 hashes. These include a sum (numeric sum represented by the hash) and a modulo operation. Now I'm wondering what the best way to implement these operations is. I'm using hashlib to calculate the hashes, but since the hashes I get are then string, how do I calculate with them?

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• Converting XAML to bitmap in Silverlight

  - by Shay Friedman

  Hi, I want to convert XAML to bitmap in Silverlight (I'm using version 4). I saw that there was a simple solution for WPF but the needed classes do not exist in Silverlight. Has anyone done such a thing?

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• Erlang programming exercises

  - by valya

  I'm learning Erlang. I've moved from Haskell so I don't want to and have to learn functional programming. But Erlang is quite specific because of the microprocesses. So, can you give me some examples which will be simple to test and measure and use all the power of Erlang?

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• NASM and a question about ADC - ASM 8086

  - by Tal

  Hello,I study assembly on High-school and I would like to try to make assembly programs at home. I downloaded NASM but I don't understand how to run the .s files with it - if you can write a simple way here to run it I'd glad :-) and in addition I have a question: when I use ADC for exmaple: AL = 01 and BL = 02, and CF = 1, when I make this: ADC AL,BL Will AL be 3 or 4? (with the CF addition or without?) Thank you!!

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• Avoiding .gsp extention in a GSP Page Without a Controller

  - by Guy

  Using grails 1.2.1 this should be very simple, but still I can't get it to work. In my application /grails-app/views I've added mypage.gsp Plus "/mypage"(view:"mypage") to the mappings block of my URLMapping class. while http://server-name:8080/myapp/mypage.gsp works I'm still getting 404 - page not found when I try to open http://server-name:8080/myapp/mypage Thanks, Guy

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