_tweet.md

proxy-curry.js

const curryHandler = boundArgs => ({
    apply: (target, thisArg, argList) => {
        const totalArgs = boundArgs.concat(argList);
        return totalArgs.length >= target.length ?
            target.apply(thisArg, totalArgs) : new Proxy(target, curryHandler(totalArgs));
    },
    get: (target, prop) =>
        prop === 'length' ?
            target.length - boundArgs.length :
            prop === 'name' ?
                target.name :
                target[prop]
});

//:: (* -> a) → (* -> a)
export const curry = fn =>
    new Proxy(fn, curryHandler([]));