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liuqimichale
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"use strict";
var indexOf = String.prototype.indexOf, slice = String.prototype.slice;
module.exports = function (search, replace) {
var index = indexOf.call(this, search);
if (index === -1) return String(this);
return slice.call(this, 0, index) + replace +
slice.call(this, index + String(search).length);
};
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