this

I was explaining to a Java developer why his method call wasn't working. He just needed to add $this->method_name(); He then asked me, "Why do I need to add $this to the method when it's declared in the same class?" I didn't really know how to answer. Maybe it's because PHP has a global namespace and it you need to explicitly tell it that the method you are looking for belongs to the current class? But then why doesn't PHP check the current class for the method BEFORE looking at the global namespace? The problem would also be that if you declared a function foo() and a method foo() , php would

This question already has an answer here: How to access the correct `this` inside a callback? 10 answers in App: var bootstrap = new Bootstrap(); bootstrap.init( this, this.onBootstrapComplete ); in Bootstrap: this.init = function( app, completeHandler ){ _app = app; _completeHandler = completeHandler; ... } ... var _allReady = function(){ _completeHandler( _app ); } back in App: this.onBootstrapComplete = function( app ) { app.something(); app.someValue = ... } I wanted to get this context inside onBootstrapComplete. It works but it doesn't look right :) If let's say I wanted to call

After watching Kyle Simpson's Advanced JavaScript course on Pluralsight, I created a simple code snippet to try out this binding. I usually work in SublimeText editor and have node build engine configured in it and occasionally I run the same code in browser as well. I have noticed one difference in the program output when execute code in Node and in Browser [Chrome]. Following is the code snippet to try out this binding. function foo() { console.log(this.bar); } var bar = "bar1"; var obj = {bar : "bar2"}; foo(); foo.call(obj); When I execute it using Sublime, it returns undefined and bar2 .

This question already has an answer here: How to access the correct `this` inside a callback? 10 answers In one of my classes, a method performs AJAX requests. In the callback function of a request, I need to call another method of my object, using this . But this does not refer to my object in this context, so I don't know how to do... Is it only possible ? To clarify, please consider the following code : function MyClass(arg) { this.foo = arg; } MyClass.prototype = { myMethod: function() { console.log("I am myMethod"); }, myGet: function (){ $.get("http://example.iana.org/",function(data){

The title says it all. When I use the fat-arrow in CoffeeScript, it stores this first before calling the function. For example: class myClass constructor: -> element = $ "#id" element.click -> @myMethod(@value) return return myMethod: (c)-> window.console.log(c) return would yield var myClass; myClass = (function() { function myClass() { var element; element = $("#id"); element.click(function() { this.myMethod(this.value); }); return; } myClass.prototype.myMethod = function(c) { window.console.log(c); }; return myClass; })(); Now on line#8 of JavaScript, this.myMethod is wrong. In this scope,

I am wondering how I use Jquery selectors within the Ajax response. My site has a feed and each main block has a unique ID, but I dont want to uniquly ID every div thats within that (which is alot). So far $(this) returns the clicked ID from within the main event handler, but when I use it within the response function, I get 'undefined'. How can I achieve the same effect as $(this) from within the response or do I have to find a unique ID somewhere? The main function is being called via a hyperlink with a specific rel attribute function(msg){ var container = $(this).parent().attr('id'); alert