30-seconds-of-code/snippets/js/s/curry-function.md

title, type, language, tags, cover, dateModified

title	type	language	tags	cover	dateModified
Curry function	snippet	javascript	function recursion	rocky-beach-2	2020-10-22T20:23:47+03:00

Curries a function.

• Use recursion.
• If the number of provided arguments (args) is sufficient, call the passed function fn.
• Otherwise, use Function.prototype.bind() to return a curried function fn that expects the rest of the arguments.
• If you want to curry a function that accepts a variable number of arguments (a variadic function, e.g. Math.min()), you can optionally pass the number of arguments to the second parameter arity.

const curry = (fn, arity = fn.length, ...args) =>
  arity <= args.length ? fn(...args) : curry.bind(null, fn, arity, ...args);

curry(Math.pow)(2)(10); // 1024
curry(Math.min, 3)(10)(50)(2); // 2