JavaScript For Loop - JavaScript Snipplr Social Repository

Revision: 38927

at January 10, 2011 16:54 by danielwrobert

Initial Code

var numbers = [1, 2, 3, 4, 5];

for (var i = 0, var ii = numbers.length;  i  <  ii;  i++)
{
  numbers[i] *= 2;
}

alert("The last item in the array is " + numbers[numbers.length - 1]);

Initial URL

http://www.sitepoint.com

Initial Description

I saw this useful little variation of a for loop in a tutorial by Kevin Yank at Sitepoint. By adding an additional variable "ii" in the loop's arguments, you can avoid having your program calculate the length of your array every time it loops through. Saves on processing. Delightful.

Initial Title

JavaScript For Loop

Initial Tags

javascript

Initial Language

JavaScript

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