Javascript Date: Ensure getMinutes(), getHours(), getSeconds() puts 0 in front if necessary

Question

Looking for a creative way to be sure values that come from the getHours, getMinutes, and getSeconds() method for the javascript Date object return \"06\" inste

Answer 1

Similar to @jdmichal's solution, posting because I'd prefer something a little shorter:

function pad(n) { return ("0" + n).slice(-2); }

pad(6); // -> "06"
pad(12); // -> "12"

Rather than add individual methods to Date.prototype, you could just add this method to Number.prototype:

Number.prototype.pad = function (len) {
    return (new Array(len+1).join("0") + this).slice(-len);
}

// Now .pad() is callable on any number, including those returned by
var time = date.getHours().pad(2) + ":"
         + date.getMinutes().pad(2) + ":"
         + date.getSeconds().pad(2);