mirror of https://github.com/webpack/webpack.git
33 lines
618 B
JavaScript
33 lines
618 B
JavaScript
/*
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MIT License http://www.opensource.org/licenses/mit-license.php
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*/
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"use strict";
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/** @template T @typedef {function(): T} FunctionReturning */
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/**
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* @template T
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* @param {FunctionReturning<T>} fn memorized function
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* @returns {FunctionReturning<T>} new function
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*/
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const memorize = fn => {
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let memorized = false;
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/** @type {T} */
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let result = undefined;
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return () => {
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if (memorized) {
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return result;
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} else {
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result = fn();
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memorized = true;
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// Allow to clean up memory for fn
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// and all dependent resources
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fn = undefined;
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return result;
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}
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};
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};
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module.exports = memorize;
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