/ Published in: JavaScript
pads a string "2".pad(2, "0"); //02
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String.prototype.pad = function(l, s){ return (l -= this.length) > 0 ? (s = new Array(Math.ceil(l / s.length) + 1).join(s)).substr(0, s.length) + this + s.substr(0, l - s.length) : this; };