git.r.bdr.sh - rbdr/dotfiles/blob

   1 // Thanks: http://www.2ality.com/2014/01/efficient-string-repeat.html
   2
   3 'use strict';
   4
   5 var value     = require('../../../object/valid-value')
   6   , toInteger = require('../../../number/to-integer');
   7
   8 module.exports = function (count) {
   9         var str = String(value(this)), result;
  10         count = toInteger(count);
  11         if (count < 0) throw new RangeError("Count must be >= 0");
  12         if (!isFinite(count)) throw new RangeError("Count must be < ∞");
  13         result = '';
  14         if (!count) return result;
  15         while (true) {
  16                 if (count & 1) result += str;
  17                 count >>>= 1;
  18                 if (count <= 0) break;
  19                 str += str;
  20         }
  21         return result;
  22 };