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  • Does array contain a specific value

    - by padatronic
    Hi chaps, I have an array of nsdictionaries and one key is ID (which is unique) I simply want to see if the the array of dictionaries contains a specific ID. Really simple but its friday and after statiny up watching the election i think my brain is melting. Any help would be great. Thanks

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  • drawRect:rect how to call this method , I am using to draw a string

    - by user338322
    -(void)drawRect:(CGRect)rect { CGContextRef context = UIGraphicsGetCurrentContext(); CGContextSelectFont(context, "Arial", 24, kCGEncodingFontSpecific); CGContextSetTextPosition(context,80,80); CGContextShowText(context, "hello", 6); //not even this works CGContextShowTextAtPoint(context, 1,1, "hello", 6); } I want to kn ow how to call above method, i have paste above code in the implemntation file simply, but dont know why its not called when i execute the project, can some one

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  • PHP's form bracket trick is to Django's ___?

    - by Matt
    In PHP you can create form elements with names like: category[1] category[2] or even category[junk] category[test] When the form is posted, category is automatically turned into a nice dictionary like: category[1] => "the input value", category[2] => "the other input value" Is there a way to do that in Django? request.POST.getlist isn't quite right, because it simply returns a list, not a dictionary. I need the keys too.

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  • Should you use LAMP or Spring Framework ?

    - by gazzzz
    Recently, I've been exploring Java space, and came across Spring Framework. Is this a web app framework like CodeIgniter or Rails ? If so, is Springs used for developing enterprise web applications that runs on Java EE technology ? I am curious, why Spring is getting lot of attention. Isn't it a lot cheaper to simply use LAMP + CI or Rails to develop web application ? Can Spring be used to develop desktop applications ?

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  • Created C header file, getting errors..

    - by Daniel
    Hi, I'v created a C header file (It's compiled), now when i compile my program it comes up with tons of errors like: warning: null character(s) ignored error: stray ‘\23’ in program TheFunctions.h:1722: error: stray ‘\200’ in program Inside the header file is simply two functions, which work in the normal c program. Please help!

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  • Why would I use Dropbox *and* Git for my Emacs initialization file?

    - by Michiel Borkent
    I hear a lot of Emacs users have their init file under git version control and sync the git repository over Dropbox, when they run Emacs on multiple systems. Why would you use git in this situation exactly? Usually checking which system you're on and which things to load and set depending on that can happen in one and the same init file for all systems, right? So, isn't it simply enough to put your init file in a Dropbox directory and load that one directly from Emacs then?

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  • Is this technically thread safe despite being mutable?

    - by Finbarr
    Yes, the private member variable bar should be final right? But actually, in this instance, it is an atomic operation to simply read the value of an int. So is this technically thread safe? class foo { private int bar; public foo(int bar) { this.bar = bar; } public int getBar() { return bar; } } // assume infinite number of threads repeatedly calling getBar on the same instance of foo.

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  • Finding good heuristic for A* search

    - by Martin
    I'm trying to find the optimal solution for a little puzzle game called Twiddle (an applet with the game can be found here). The game has a 3x3 matrix with the number from 1 to 9. The goal is to bring the numbers in the correct order using the minimum amount of moves. In each move you can rotate a 2x2 square either clockwise or counterclockwise. I.e. if you have this state 6 3 9 8 7 5 1 2 4 and you rotate the upper left 2x2 square clockwise you get 8 6 9 7 3 5 1 2 4 I'm using a A* search to find the optimal solution. My f() is simply the number of rotations need. My heuristic function already leads to the optimal solution but I don't think it's the best one you can find. My current heuristic takes each corner, looks at the number at the corner and calculates the manhatten distance to the position this number will have in the solved state (which gives me the number of rotation needed to bring the number to this postion) and sums all these values. I.e. You take the above example: 6 3 9 8 7 5 1 2 4 and this end state 1 2 3 4 5 6 7 8 9 then the heuristic does the following 6 is currently at index 0 and should by at index 5: 3 rotations needed 9 is currently at index 2 and should by at index 8: 2 rotations needed 1 is currently at index 6 and should by at index 0: 2 rotations needed 4 is currently at index 8 and should by at index 3: 3 rotations needed h = 3 + 2 + 2 + 3 = 10 But there is the problem, that you rotate 4 elements at once. So there a rare cases where you can do two (ore more) of theses estimated rotations in one move. This means theses heuristic overestimates the distance to the solution. My current workaround is, to simply excluded one of the corners from the calculation which solves this problem at least for my test-cases. I've done no research if really solves the problem or if this heuristic still overestimates in same edge-cases. So my question is: What is the best heuristic you can come up with? (Disclaimer: This is for a university project, so this is a bit of homework. But I'm free to use any resource if can come up with, so it's okay to ask you guys. Also I will credit Stackoverflow for helping me ;) )

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  • Apache Mod Rewrite question

    - by ezlem
    I am not really familiar with apache modrewrite I have url parameters such as {domain}/index.php?blog=5 i simply want to make it {domain}/home.php?client=5 Is it a task as simple as it sounds and can anyone help ?

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  • Switching MySql Replication Format

    - by NNN
    I'm currently using statement-based replication. After upgrading to MySql 5.1, I'm considering using row-based replication. After reading the docs it seems that you can change the format of the master on the fly. Will the slave automatically adapt to whatever type of binary log it is sent? Do I have to make any changes to the slave or master to get ready for switching or can I simply modify the binlog_format variable on the master?

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  • prompt to reboot computer after installation completed

    - by Ashwin
    I am currently adding a deployment project to my C# solution which installs a windows service and I have been trying to find a property that will make the installer prompt the user to reboot the system once installation has completed. I would prefer to simply set a property rather than create a small application that I run at the end of the install.

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  • how to .call() on the unnamed function in javascript?

    - by Anonymous
    Let's suppose I have button #click, And suppose I bind the on click event as follows: $('#click').click(function(){ alert('own you'+'whatever'+$(this).attr('href')); }); But I want this to refer to some other element, let's say #ahref. If it was a named function I would simply refer it by name: foo.call('#ahref'); How could I use .call() though, if the function is called inline and does not have a name?

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  • Redundant code constructs

    - by Diomidis Spinellis
    The most egregiously redundant code construct I often see involves using the code sequence if (condition) return true; else return false; instead of simply writing return (condition); I've seen this beginner error in all sorts of languages: from Pascal and C to PHP and Java. What other such constructs would you flag in a code review?

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  • How to have multiple parts of a website in one page

    - by stas
    I want to make a website that will have multiple pages, but because of a unique navigation bar, I cannot simply link to a new file for each page. What is the best way to accomplish this. Some possibilities that I can think of are having all of them on one page, but using css and javascript to move the other pages offscreen, or using iframes and loading them with javascript. Could someone please direct me to some examples or tutorials?

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  • Correct way to create a menu with shortcuts in WPF

    - by mattdekrey
    What is the correct/best way to create a menu with hotkey shortcuts? I simply want a File menu like Visual Studio's that has New, Open, Save, Save All, Exit, and a few other standard shortcuts. It seems that InputGestureText displays the appropriate text, but since it's called "Text" and doesn't seem to trigger events, I'm going to assume that isn't the right way to do it. The Command architecture also seems fairly bulky, so I don't want to head down that path if there is a better way.

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  • iPhone Safari Web Application not using cache at all?

    - by Liuyi Sun
    Hi, guys, I've been developing an iphone web application for a while, and encountered a weird problem: when open the web app in safari(with safari chrome, not starting it from home screen), safari can generate proper "If-Not-Modified-Since" and "If-None-Matches", so the server simply gives 304 Not Modified to speed up the process. however, when starting the app from home screen, safari seems to forget these two headers, and server always replies with 200 OK... any ideas for this?

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