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alexlenail/DefaultDict.js

Created October 29, 2018 02:25
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DefaultDict.js
var DefaultDict = (initValue) => new Proxy({}, {
get: (target, name) => name in target ? target[name] :
(target[name] = (typeof initValue === 'function' ? initValue() : initValue))
});
statistics = DefaultDict(() => DefaultDict(() => DefaultDict(0)));
// Thanks @jonathanzong!
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