28 lines
714 B
Plaintext
28 lines
714 B
Plaintext
/**
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* Copyright (c) 2013-present, Facebook, Inc.
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* All rights reserved.
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*
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* This source code is licensed under the BSD-style license found in the
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* LICENSE file in the root directory of this source tree. An additional grant
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* of patent rights can be found in the PATENTS file in the same directory.
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*
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* @providesModule generateRandomKey
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* @format
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* @flow
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*/
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'use strict';
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const seenKeys = {};
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const MULTIPLIER = Math.pow(2, 24);
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function generateRandomKey(): string {
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let key;
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while (key === undefined || seenKeys.hasOwnProperty(key) || !isNaN(+key)) {
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key = Math.floor(Math.random() * MULTIPLIER).toString(32);
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}
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seenKeys[key] = true;
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return key;
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}
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module.exports = generateRandomKey; |