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