The whole of the JavaScript language is built on one central data structure - the associative array. Objects in JavaScript are just associative arrays and this causes a lot of confusion at first. But ...

JavaScript’s arrays can hold heterogeneous types, change size on the fly, and readily insert or remove elements. Traditional methods like slice, splice, and push/pop do this by operating on the array ...

As Array is an object, is has some methods that have been added to make it more useful. These make the JavaScript array easier to use in some applications than arrays in other languages. For example ...