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• What does “@public” mean in Objective-C?

  - by Ty

  After reading a question on @private I understand how that works. However, since all variables default to @protected and you cannot really access a variable without defining an accessor, what exactly does @public do? When would you use it?

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• Dinamic Text limit when users writes in a textobox (HTML)

  - by DomingoSL

  Hello i need to implement in Html/javascript (or php is possible) a script who works like twitter, when the user writes text in a field a label change showing the caracters left. Can you help me with a simple and easy script example?

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• Notepad ++ Replace All Regular Expression (Start of the line and End of the line)

  - by user296256

  Hello, I am tryin to Replace the start of line with a "(". However when i use replace all i'm not able to do so. For eg: 432425\n 4254645\n w4546746\n 46457367\n 4765756\n I want the output as using Replace All So i use the ^ symbol with Regular Expression Selected and Replace All. Using only Replace works fine. (432425\n (4254645\n (w4546746\n (46457367\n (4765756\n

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• How to make Vim's global command :g/ work on per occurrence basis.

  - by holoduke

  Typically Vim's global command :g// works on per line basis. Is it possible to make it work on per occurrence basis as there could be more than one occurrence on a line.

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• How does PHP know what the last database connection is when mysql_select_db() or mysql_query() is us

  - by agscala

  Consider the following code: <?php $conn = mysql_connect('localhost', 'username', 'password'); mysql_select_db('database', $conn); ?> This works as expected, but how does PHP know what database connection to use when calling mysql_select_db() in the following example? <?php mysql_connect('localhost', 'username', 'password'); mysql_select_db('database'); ?>

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• Why is there no Sum() extension for IEnumerable<uint>

  - by dss539

  It seems that Sum not defined for IEnumerable<uint> (and other unsigned integers, for that matter) var s = new int[] { 1, 2, 3 }; s.Sum(); //works fine var us = new uint[] { 1, 2, 3 }; us.Sum(); //missing method I would like to know: Have I done something fundamentally wrong/misunderstood the situation? What design decisions might cause the omission of IEnumerable<uint>.Sum()? MSDN: Enumerable.Sum

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• Loop through array, print with string.

  - by Adam

  I have a simple array like: var myArr=["one","two","three"]; an I have a counting loop, which increases the value of var i by one. What I want to do is print the next value from the array each time the loop runs, next to a text string, like so: alert('value number '+myArr[i]+); But for some reason I can't get this to work. The following code works, so I'm assuming I'm not calling the counter right: alert('value number '+myArr[0]+);

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• Django - problem with {% url facebook_xd_receiver %}

  - by Gaurav

  I'm using {% url facebook_xd_receiver %} in one of my HTML files. This works just fine when I run my project using the command python manage.py runserver But the same project stops running and gives me a "TemplateSyntaxError" at the line {% url facebook_xd_receiver %} Can anyone please tell me what could be the difference between the dev server run through the command line and the apache server. Is there anything I'm missing out on while configuring the Apache server? Or is it a Django problem?

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• Does github require each committer to have their own fork of the project?

  - by mariosangiorgio

  I'd like to try git (hosted on github) for a new project, but I have a doubt on how it works. I am working with another guy, do we need to have two forks of the project and then merge them every time one of us makes a change to the code or is it possible to work in pair on a single origin?

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• LaTeX: How to find package(s) that a command belongs to?

  - by Ashwin

  It is a simple question to which I am not able to find the answer: Given a LaTeX command, how do I find out what package(s) it belongs to or comes from? For example, given the \qquad horizontal spacing command, what package does it come from? Especially troublesome since it works without including any package!

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• How to load and show an png image in matlab?

  - by user198729

  >> I = imread('D:\Works\matlab\SecCode.php.png','png'); >> imshow(I); The above always shows an all-black one,what's wrong with it?

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• Is there an easy way to "append()" two dictionaries together in Python?

  - by digitaldreamer

  If I have two dictionaries I'd like to combine in Python, i.e. a = {'1': 1, '2': 2} b = {'3': 3, '4': 4} If I run update on them it reorders the list: a.update(b) {'1': 1, '3': 3, '2': 2, '4': 4} when what I really want is attach "b" to the end of "a": {'1': 1, '2': 2, '3': 3, '4': 4} Is there an easy way to attach "b" to the end of "a" without having to manually combine them like so: for key in b: a[key]=b[key] Something like += or append() would be ideal, but of course neither works on dictionaries.

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• BYTE typedef in VC++ and windows.h

  - by jules

  Hi, I am using Visual C++, and I am trying to include a file that uses BYTE (as well as DOUBLE, LPCONTEXT...) , which by default is not a defined type. If I include windows.h, it works fine, but windows.h also defines GetClassName wich I don't need. I am looking for an alternative to windows.h include, that would work with VC++ and would define most of the types like BYTE, DOUBLE ... Thanks

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• Wrapper Dll to wrap an application

  - by sijith

  Hi, Want to wrap the original exe to produce new exe. This new exe works with it's original functionality, no limitation but the outer part controls the trial situation. Is it possible to do with VC++ Please give some valuable help

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• Rails - before_save that includes updated object

  - by Sam

  I have a before_save that calculates a percentage that needs to include the object that is being updated. Is there a one-liner in Rails that takes care of this? for example and this is totally made up: Object.find(:all, :include => :updated_object) Currently I'm sending the object that is getting updated to the definition that calculates the percentage and that works but it's making things messy.

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• Dropbox links in a Phonegap app (Android)

  - by genericatz

  I try to create downloadable links to files which can be downloaded directly after clicking the link. I added "dl" instead of "www" and "?dl=1" in the end of the dropbox link (dropbox api: directly download files). The direct download works perfectly in the chrome browser but if I package the app which phonegap and click on the same link whithin the resulting app the file will not be downloaded. Is this not possible whithin the adroid browser or do I have to modify some android browser preferences?

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• Pre-release checklist

  - by bogdansrp

  I built an 10.6+ only app, I tested it in 32-bit and 64-bit mode and everything works (or at least I couldn't find anything wrong). I need help with the actual release build of the app. What settings should I keep an eye out for? Thanks!

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• Where to learn about enemy game algorithms (like Starcraft/Warcraft)?

  - by user63898

  I would like to learn about games (strategy) algorithms especially about how do enemies algorithms works ? Is there any good place for beginners?

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• does such a c++ tool exist? [I dont know what to call it]

  - by VSC

  Hello, I am going through the process of trying to figure out how a library of code works. I would like some sort of tool that would analyze the program that I run off of the library and tells me what functions are called in what order by each thread. Does such a tool exist? What google terms would I use to find such a program? Note: Using VS2008/Win7/C++

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• operator[][] C++

  - by bobobobo

  I'd like to overload operator[][] to give internal access to a 2D array of char in C++. Right now I'm only overloading operator[], which goes something like class Object { char ** charMap ; char* operator[]( int row ) { return charMap[row] ; } } ; It works ok.. Is it possible to override operator[][] though?

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• Validate links with php

  - by mike

  Can anyone tell me if its possible to validate a link with php? By validate, I mean check if the link is active and works not just the actual format of the link.

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• Java: Why subList(0, 5).clear() doesn't work on my objects?

  - by serg555

  If I run this operation on List<Integer> for example, it works as expected (removes first 5 elements), but when I run it on a list of my objects, nothing happens (list stays the same). list.subList(0, 5).clear(); My class is a pojo that doesn't implement equals or hashCode, if that matters.

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• phonegap crash on "resume"

  - by fancy

  My phonegap application works great but there is a glitch when it is sent to the background or "paused". When focused is returned to the app a high percentage of the time the interface is frozen and then the application crashes a few seconds later. When relaunched it is working fine again. Could anyone provide some information as to what could be causing this and where I should start trying to debug it? Thanks very much.

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• Pedometer app in iphone

  - by harishdy

  How to calculate the steps a user has taken by using the accelerometer in an iPhone? The pedometer app already does this, I just don't know how it works

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• JDBC delete statement with multiple columns

  - by user1643033

  It says I ended this statement wrong when if I input it into sql plus with just the addition of ; it works perfectly. What am I doing wrong? Statement statement = connection.createStatement(); statement.executeUpdate("delete from aplbuk MODEL = '"+ textField_4.getText() + "'AND year = '" + textField_1.getText() + "' AND Litres = '" + textField_2.getText() + "' AND ENGINE_TYPE = '" + textField_3.getText() + "'"); statement.close();

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