var newT = document.createTextNode(unescape(capWords(loc_array[loc_array.length-2]))); linkElement.appendChild(newT); Currently it takes the second to last item in the array from the URL. …

What is the most concise and efficient way to find out if a JavaScript array contains a value? This is the only way I know to do it: function contains(a, obj) { for (var i = 0; i < a.length;...

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- …

The splice() method changes the contents of an array by removing or replacing existing elements and/or adding new elements in place. N.B : In case you're working with reactive frameworks, it will update …

Jun 10, 2010 · In the case of an array, the callback is passed an array index and a corresponding array value each time. (The value can also be accessed through the this keyword, but Javascript will …

Dec 9, 2008 · How do I append an object (such as a string or number) to an array in JavaScript?

We'll use that fact later. Array.apply(null, [undefined, undefined, undefined]) is equivalent to Array(undefined, undefined, undefined), which produces a three-element array and assigns …

variable.constructor === Array This is the fastest method on Chrome, and most likely all other browsers. All arrays are objects, so checking the constructor property is a fast process for JavaScript engines. …

Assuming a somewhat pedantic definition, it is technically impossible to create a 2d array in javascript. But you can create an array of arrays, which is tantamount to the same.

It actually creates an array of size 5 (all elements undefined), assigning it to the variable a, and then immediately throws that array away and assigns to the variable a another, brand new array of size 5, …