8 lines
218 B
JavaScript
8 lines
218 B
JavaScript
module.exports = fn => {
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const cache = new Map();
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const cached = function(val) {
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return cache.has(val) ? cache.get(val) : cache.set(val, fn.call(this, val)) && cache.get(val);
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};
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cached.cache = cache;
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return cached;
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}; |