| 'use strict'; |
| |
| var toInteger = require('../../../number/to-integer') |
| , value = require('../../../object/valid-value') |
| |
| , min = Math.min, max = Math.max; |
| |
| module.exports = function (searchString/*, endPosition*/) { |
| var self, start, endPos; |
| self = String(value(this)); |
| searchString = String(searchString); |
| endPos = arguments[1]; |
| start = ((endPos == null) ? self.length : |
| min(max(toInteger(endPos), 0), self.length)) - searchString.length; |
| return (start < 0) ? false : (self.indexOf(searchString, start) === start); |
| }; |