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17 lines
372 B
17 lines
372 B
var weakMemoize = function weakMemoize(func) {
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// $FlowFixMe flow doesn't include all non-primitive types as allowed for weakmaps
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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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// $FlowFixMe
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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 default weakMemoize;
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