I was just trying to learn and understand jQuery source code (so far with little success X_X) in order to improve my JavaScript skills. As my understand of JavaScript increases I came up with this little logging/debugging tool. As of my level of JavaScript I am posting the code here for people to judge and audit. So potentially I can lea...
Hello, I am writing a simple counter, and I would like to make installation of this counter very simple for users. One of the simplest counter code (for users who install it) I ever see was Google Analytics Code So I would like to store main code in a file and user who will install my counter will need just to set websiteID like this: ...
var foo = (function() { var proxy = {}, warning = false; proxy.warn = function(msg) { if (!warning) { warning = true; alert(msg); } return this; //For the purpose of method chaining we return proxy object. } function func() { alert(warning); //This is a pri...
The more I delve into javascript, the more I think about the consequences of certain design decisions and encouraged practices. In this case, I am observing anonymous functions, a feature which is not only JavaScript-provided, but I see strongly used. I think we can all agree on the following facts: the human mind does not deal with m...
Part of a website's JSON response had this (... added for context): {..., now:function(){return(new Date).getTime()}, ...} Is adding anonymous functions to JSON valid? I would expect each time you access 'time' to return a different value. ...
I know you can create an anonymous function, and have the compiler infer its return type: val x = () => { System.currentTimeMillis } Just for static typing's sake, is it possible to specify its return type as well? I think it would make things a lot clearer. ...
I'm using the code: var x = function() {return true;}; trying to set x to true, the return value of the function, but instead x is defined as the function itself. How can I set x as the return value of the function? I could easily code around this problem by using a non-inline function or some such, but it bugs me because I'm sure the...
I have the following function. What it does is, given a Control (most likely a windows form) i want to have all of the controls contained that "obey" the Rules ( a function screening the controls i want ) subscribe to an event (lets say KeyDown). The question is: how do i unsubscribe? Or more importantly, do i need to? Since i will b...
As noted in this blog post you can set the scope of this in an anonymous function in Javascript. Is there a more elegant way of scoping this in the anonymous function call on success of the AJAX request (i.e. not using that)? For example: var Foo = { bar: function(id) { var that = this; $.ajax({ url: "www.somedomain...
If you paste these codes http://paste.plurk.com/show/152772 in http://htmledit.squarefree.com/ You will see the codes run without any problem. The images altogether will turn into a slideshow. However, if you paste the following codes: http://paste.plurk.com/show/152773 The codes will fail to run, no slideshow. These two pieces of c...
I want to serialize a class which uses an anonymous function in its implementation. The compiler is generating an inner class to implement the anonymous function. The serializer fails with the error: "MyClass+<>c__DisplayClass2 is inaccessible due to its protection level. Only public types can be processed." public class MyClass { ...
Is it possible to get the number of arguments expected of an anonymous function in PHP? I'm aware of ReflectionMethod, but that seems to only work if the method is defined on a class. In my case, the anonymous function is either going to have 1 or two arguments. I'd prefer to do the checking correctly, rather than wrapping the first call...
I am using QUnit, which is excellent. I have enclosed my JS app in the (function () {})(); sandbox. This hides a lot of code that I don't want public, but I also need to test that code. Here is an example of how this works: (function () { var PublicAPI = window.PublicAPI = {}; PublicAPI.publicFunction = function (fo...
I noticed in JQuery that the following code structure is used (function(){var l=this,g,y=l.jQuery,p=l.$,...})() Which seems to create a function, and call it. What is the benefit of taking this approach versus having the contents of the function inline? ...
I quite often have to bind? some function that requires arguments. The solution I use is wrapping the function to bind inside an anonymous function. function foo( arg_0 ) { // do stuff with: arg_0 } function bar() { var abc; // stuff happens abc = 'some value'; attachEventHandler(elementId, 'click', function(){foo( abc )...
I am using Params::Validate for validation, but at the callbacks section instead of defining the direct anonymous function, if I try giving the reference to that anonymous function it is directly jumping to the error logging area without printing the message inside the block (in case of passing correct value). use Params::Validate qw(...
I recently really wanted to us anonymous functions in PHP. Unfortunately my host is still on 5.2. I automatically thought this would work: uasort($array, function($a, $b) { return $a > $b; }); Is this how they work? Simply passed in as an argument instead of a callback? The docs don't say specifically that's how they do, but I hav...
Hi everyone, recently I came up with the following problem: In my web site in all html pages I call a function in body onLoad event: <body onLoad="func1();"> This is part of my template for html, so it appears on every page in my site and I can't change that. Now, the deal is that on some pages, I need to call some other functions o...
Hi SO, I am trying to learn JavaScript but I've come across a hurdle. If the answer is obvious and reachable through a simple search I apologize in advance. I am a novice to programming and JavaScript, and unsure what line of inquiry to follow. In the following code, the function takes values from a HTML form, does some processing and ...
I've put together a small code-sample below (Currently in C# 3.5 but would also like to know if the answer is any different in C# 4.0) I have three simple delegates, and three simple functions ... No problem here, everything compiles as expected, and will not compile if I accidentally try to link delegate A with Method B etc (wrong numb...