Jun 10, 2010 · The $.each() function can be used to iterate over any collection, whether it is a map (JavaScript object) or an array. In the case of an array, the callback is passed an array index and a …

Feb 17, 2012 · JavaScript has powerful semantics for looping through arrays and array-like objects. I've split the answer into two parts: Options for genuine arrays, and options for things that are just array- …

for (var j = 0; j < myArray.length; j++){ console.log(myArray[j.x]); } This returns "undefined." Again the console log outside the loop tells me that the objects all have values for "x". How do I access these …

Mar 18, 2011 · for(var i = array.length; i--; ) It caches the length and is much shorter to write. But it will iterate over the array in reverse order.

Jul 3, 2009 · Here is something quite similar in pure JavaScript, using JavaScript's forEach method. forEach takes a function as an argument. That function will then be called for each item in the array, …

7 To loop through an object array or just array in javascript, you can do the following:

The for-in statement by itself is not a "bad practice", however it can be mis-used, for example, to iterate over arrays or array-like objects. The purpose of the for-in statement is to enumerate over object …

Apr 5, 2012 · Since now, I'm using this loop to iterate over the elements of an array, which works fine even if I put objects with various properties inside of it. var cubes[]; for (i in cubes){ cubes[i].

2 You might consider using .reduce - on each iteration, add the first array value to a property of the accumulator, and do whatever you need to with the second array value, assigning its result to …

May 13, 2012 · Array.isArray(testArray) For what's worth, JavaScript does have array that's said to be sparse. This happens when you use delete operator to remove an element or change length property …