curry2.js

function curry2(func) {
    return function (...args) {
        if (args.length < 2) {
            return func.bind(this, ...args);
        }
        return func.apply(this, args);
    };    
}

This looks good: http://2ality.com/2017/11/currying-in-js.html#comment-3610735527

// @flow
function curry2<M: Array<mixed>, T>(
  func: (...M) => T
): (...M) => (T | (...M) => T) {
  return function (...args) {
    if (args.length < 2) {
        return func.bind(this, ...args);
    }
    return func.apply(this, args);
  };    
}

🤷‍♂️

[email protected] here is the example

function curry2<R>(func: (...args: any[]) => R ): () => R {
    return function (...args: any[]): R {
        if (args.length < 2) {
            return func.bind(this, ...args);
        }

        return func.apply(this, args);
    }
}

typescript@next once variadic kinds are available

function curry2<...T, R>(func: (...args: ...T) => R ): (...args: ...T) => R {
    return function (...args: ...T): R {
        if (args.length < 2) {
            return func.bind(this, ...args);
        }

        return func.apply(this, args);
    }
}

@scyclow @aminpaks Thanks! I’ll experiment with assuming that func has exactly two parameters (= 3 type variables, incl. the result).

assuming that func has exactly two parameters (= 3 type variables, incl. the result)

@rauschma That would make it much easier with the current implementation of Typescript:

function curry2<TF, TS, R>(func: (first: TF, second: TS) => R ): (first: TF, second: TS) => R {
    return function (first: TF, second: TS): R {
        return func.call(this, first, second);
    }
}

Example