arrays-length.js

// way#1 - adding the element to an arbitrary position
var a1 = new Array();
a1[1000 * 1000 * 1000] = 'a';
a1.length; // 1000000001

// way#2 - setting the length at creation time
var a2 = new Array(1000*1000*1000 + 1);
a2[0] = 'a';
a2.length; // 1000000001

//way#3 - setting length property:
var a3 = new Array();
a3[0] = 'a';
a3.length = 1000*1000*1000 + 1;
a3.length; // 1000000001