“concat” does not join JavaScript arrays together?

Question

I\'m running the following code on Webkit:

var scriptElements = document.scripts;
var scriptUrls = [];
// URL matching
var regexp = /\\b((?:[a-z][\\w-]+:(?:\         


        

Answer 1

concat does not alter this or any of the arrays provided as arguments but instead returns a "one level deep" copy that contains copies of the same elements combined from the original arrays.

https://developer.mozilla.org/en-US/docs/JavaScript/Reference/Global_Objects/Array/concat