string[] js to one string code example

Example 1: string javascript concatenation

var dest = new String("");
    var src = new String("aze");
    var ar = new Array();
    ...
    ar.push(src);
    ar.push(src);
    ...
    dest = ar.join("");

Example 2: javascript add to string

var s = 'hell'
s = s + 'o'