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;...

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 …

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 …

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- …

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 …

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

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.

This method won't solve the problem with holes in an array (sparse array). It is costly as it will re-index the array, and it returns an array that you have to access again to get the value. For example, if you …