17 lines
422 B
JavaScript
17 lines
422 B
JavaScript
var weakMemoize = function weakMemoize(func) {
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var cache = new WeakMap();
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return function (arg) {
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if (cache.has(arg)) {
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// Use non-null assertion because we just checked that the cache `has` it
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// This allows us to remove `undefined` from the return value
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return cache.get(arg);
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}
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var ret = func(arg);
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cache.set(arg, ret);
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return ret;
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};
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};
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export { weakMemoize as default };
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