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JavaScript closures vs. anonymous functions
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Editor's Note: All functions in JavaScript are closures as explained in this post. However we are only interested in identifying a subset of these functions which are interesting from a theoretical point of view. Henceforth any reference to the word closure...
Switch on ranges of integers in JavaScript [duplicate]
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@collapsar case statements in JavaScript are fundamentally order-dependent. It would be unwise to ever start blindly reordering the cases. That optimization you are talking about is only relevant in some very limited situations - most programs would never...
is it possible to change values of the array when doing foreach in javascript?
...t Array.prototype.forEach():
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/forEach
Second, let's talk briefly about value types in JavaScript.
Primitives (undefined, null, String, Boolean, Number) store an actual value.
ex: var x = 5;
Reference Types (cu...
How to get an object's properties in JavaScript / jQuery?
In JavaScript / jQuery, if I alert some object, I get either [object] or [object Object]
7 Answers
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Getting a better understanding of callback functions in JavaScript
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Here is a basic example that explains the callback() function in JavaScript:
var x = 0;
function testCallBack(param1, param2, callback) {
alert('param1= ' + param1 + ', param2= ' + param2 + ' X=' + x);
if (callback && typeof(callback) === "function") {
x += 1;
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JavaScript Form Submit - Confirm or Cancel Submission Dialog Box
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A simple inline JavaScript confirm would suffice:
<form onsubmit="return confirm('Do you really want to submit the form?');">
No need for an external function unless you are doing validation, which you can do something like this:
&...
“var” or no “var” in JavaScript's “for-in” loop?
What's the correct way to write a for-in loop in JavaScript? The browser doesn't issue a complaint about either of the two approaches I show here. First, there is this approach where the iteration variable x is explicitly declared:
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Check if object exists in JavaScript
How do I verify the existence of an object in JavaScript?
18 Answers
18
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Is there a sleep function in JavaScript? [duplicate]
Is there a sleep function in JavaScript?
4 Answers
4
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JavaScript: Passing parameters to a callback function
...ode, I thought was this because this is the first time I use a callback in JavaScript, you've helped me to understand it wasn't the probelm, and to see a great example.
– vitto
Aug 11 '10 at 13:17
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