梁美英 / programming · Files

// Thanks: http://www.2ality.com/2014/01/efficient-string-repeat.html

'use strict';

var value     = require('../../../object/valid-value')
  , toInteger = require('../../../number/to-integer');

module.exports = function (count) {
	var str = String(value(this)), result;
	count = toInteger(count);
	if (count < 0) throw new RangeError("Count must be >= 0");
	if (!isFinite(count)) throw new RangeError("Count must be < ∞");
	result = '';
	if (!count) return result;
	while (true) {
		if (count & 1) result += str;
		count >>>= 1;
		if (count <= 0) break;
		str += str;
	}
	return result;
};