30-seconds-of-code/snippets/curry.md

Curry

Use recursion. If the number of provided arguments (args) is sufficient, call the passed function f. Otherwise return a curried function f that expects the rest of the arguments. If you want to curry a function that accepts a variable number of arguments (variadic function) like Math.min for example, you can optionally pass the number of arguments to the second parameter arity.

const curry = (f, arity = f.length, next) => 
  (next = prevArgs => 
    nextArg => {
      const args = [ ...prevArgs, nextArg ]
      return args.length >= arity 
        ? f(...args)
        : next(args);
    }
  )([]);
// curry(Math.pow)(2)(10) -> 1024
// curry(Math.min, 3)(10)(50)(2) -> 2