bbo/fill_zero.js

bbo is a utility library of zero dependencies for javascript.

'use strict';

/**
 * Increase by 0 based on string length before string
 */
function fillZero(target, n) {
  var z = new Array(n).join('0');
  var str = z + target;
  var result = str.slice(-n);
  return result;
}

module.exports = fillZero;