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'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);
};