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Discussion on: Memoization in JavaScript

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Replies for: Hi Parwinder and thanks for your article. If you use a constant for your cache, you would still be able to add some keys to it. Plus, it makes rea...

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shadowtime2000 profile image
shadowtime2000 •

You could also use a Map for that.

const memoize = (callback) => {
    const cache = new Map();

    return (...parameters) => {
        if (typeof cache.get(parameters) !== "undefined") {
            return cache.get(parameters);
        }
        cache.set(parameters, callback(...parameters));
        return cache.get(parameters);
    }
}
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radulle profile image
Nikola Radulaški •

Why not just cache.get(parameters) !== undefined?

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bhagatparwinder profile image
Parwinder 👨🏻‍💻 •

👏🏼 I like this