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27 lines
572 B
27 lines
572 B
/** |
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* Copyright (c) 2013-present, Facebook, Inc. |
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* |
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* This source code is licensed under the MIT license found in the |
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* LICENSE file in the root directory of this source tree. |
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* |
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* |
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* @typechecks static-only |
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*/ |
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'use strict'; |
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/** |
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* Memoizes the return value of a function that accepts one string argument. |
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*/ |
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function memoizeStringOnly(callback) { |
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var cache = {}; |
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return function (string) { |
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if (!cache.hasOwnProperty(string)) { |
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cache[string] = callback.call(this, string); |
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} |
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return cache[string]; |
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}; |
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} |
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module.exports = memoizeStringOnly; |