this

Slight confusion of `this` in a JavaScript call back function

$.ajax({url: path_to_file, cache: false, success: function(html_result){ $("#window_" + this.id + "_cont_buffer").html(html_result);}) Now then. This function call is with in a function of a class. this.id is a property of said class. will this pass the function value of this.id into the string the anonymous function, or will it tr...

Javascript setInterval and `this` solution

I need to access this from my setInterval handler prefs: null, startup : function() { // init prefs ... this.retrieve_rate(); this.intervalID = setInterval(this.retrieve_rate, this.INTERVAL); }, retrieve_rate : function() { var ajax = null; ajax = new XMLHttpRequest(); ...

*this vs this in C++

I understand that this does but what is the difference between *this and this? Yes I have Googled and read over *this in my text book; but I just don't get it... ...

Is it possible to access JSON properties with relative syntax when using JSON defined functions?

// JavaScript JSON var myCode = { message : "Hello World", helloWorld : function() { alert(this.message); } }; myCode.helloWorld(); The above JavaScript code will alert 'undefined'. To make it work for real the code would need to look like the following... (note the literal path to myCode.message) // JavaScript JS...

Calling a function within a class

I am having trouble calling a specific function within a class. The call is made: case "Mod10": if (!validateCreditCard($fields[$field_name])) $errors[] = $error_message; break; and the class code is: class CreditCardValidationSolution { var $CCVSNumber = ''; var $CCVSNumberLeft = ''; var $CC...

What is purpose of a "this" pointer in C++ ?

What is purpose of this keyword. Doesn't the methods in a class have access to other peer members in the same class ? What is the need to call a this to call peer methods inside a class? ...

How do I create efficient instance variable mutators in Matlab?

Previously, I implemented mutators as follows, however it ran spectacularly slowly on a recursive OO algorithm I'm working on, and I suspected it may have been because I was duplicating objects on every function call... is this correct? %% Example Only obj2 = tripleAllPoints(obj1) obj.pts = obj.pts * 3; obj2 = obj1 end I then ...

When NOT TO USE 'this' keyword?

Sorry for asking it again, there are already some questions about this keyword. But all of them tell the purpose of 'this'. When do you use this keyword C# when to use this keyword Use of “this” keyword in formal parameters for static methods in C# Proper usage of “this.” keyword in C#? My question is when not to use 'this' keyword . O...

Jquery UI Sortable - Get the item being sorted.

Hi, When using Jquery UI Sortable (which is great by the way) how do you get the item that is currently being sorted. When you use $(this); it return the actual sortable list, not the current sorted item. I want to do fancy-pants things with the widget when the user is dragging it around. E.g. Animate it when dragging between two list...

jQuery only apply to current li

I want to slide toggle the second level ul when I mouse over the relevant first level li. Currently the script displays all secondary ul on a mouseover. <div id="subNav"> <ul> <li>One</li> <ul> <li>SubOne</li> </ul> </li> <li>Two</li> <li> <ul> <li>SubTwo</li> </ul> </li>...

Having an issue with the "this" modifier...

I have this method in City class. It should create a new city based on the object which the method is applied to: public City newCity(string newCityName, int dX, int dY) { City c=new City(this); //based on a constructor : City(City c){} c.CityName=newCityName; c.NoOfNeighborhoods=1; c.NumOfResidents...

jquery "this" binding issue on event handler (equivalent of bindAsEventListener in prototype)

In jquery an event hadler's binding is the event generating DOM element (this points to the dom element). In prototype to change the binding of an event handler one can use the bindAsEventListener function; How can I access both the instance and the DOM element from a event handler? Similar to http://stackoverflow.com/questions/117361/ho...

Getting a value of td of a selected tr in jquery

Below is my table <table> <tr class=chargeTR> <td id=chargeTD> charge1 </td> </tr class=chargeTR> <td id=chargeTD> charge2 </td> </tr> <table> Below is my jquery call $(".chargeTR").each(function() { // this line works fine $.get("process.php", { ...

jQuery: How to deal with 'this' in AJAX callbacks

I currently have code similar to this for a form: $('#some-form') .submit(function() { // Make sure we are not already busy if($(this).data('busy')) return false; $(this).data('busy', true); // Do post $.post("some/url", $(this).serialize(), function(data) { ...

How do I get the clicked element with inline HTML onclick and jQuery?

Hi, I'm creating a tags with this code: $('#td' + id).append('<p><a href="#" onclick="excluirArquivo(\'' + response + '\'); return false;"><img src="/erp/proposta/media/images/delete.png" alt="Excluir arquivo" /></a> ' + file + '</p>'); excluirArquivo function function excluirArquivo(arquivo) { $.ajax({ type: 'POST', ...

When To Use this.method()?

Possible Duplicates: Why does StyleCop recommend prefixing method or property calls with this? When do you use the this keyword? Hi SO, and happy Friday I have a question regarding the use of this.method();. My code seems to work without using the this., but I include it because it seems like the right thing to do. When sh...

getting the "this" that a function's caller was called with in JavaScript

Is it possible to get the this that a function's caller was called with in JavaScript without passing this to the arguments in a way which supports IE as well as Firefox/Chrome et al? For example: var ob = { callme: function() { doSomething(); } } ob.callme(); function doSomething() { alert(doSomething.caller.this...

jquery - pass $(this) as argument?

$(document).ready(function() { function GetDeals() { alert($(this).attr("id")); } $('.filterResult').live("click", function(event) { GetDeals(); }); }); What do I need to pass as argument in function GetDeals() so that I can manipulate with $(thi...

Scoping problem with Javascript callback

I am having some trouble getting a callback function to work. Here is my code: SomeObject.prototype.refreshData = function() { var read_obj = new SomeAjaxCall("read_some_data", { }, this.readSuccess, this.readFail); } SomeObject.prototype.readSuccess = function(response) { this.data = response; this.someList = []; for (v...

Jquery (this) selector help

Hi. I have the following HTML: <div class="box"><img src="pic.jpg" alt="image" /></div> <div class="box"><img src="pic.jpg" alt="image" /></div> <div class="box"><img src="pic.jpg" alt="image" /></div> <div class="box"><img src="pic.jpg" alt="image" /></div> I am trying to select the div and the child image both at the same time. I ne...