Tag: JavaScript
Write a curry function that takes in a required callback function and returns a curried version of that function. This callback function can take in any number of arguments, including none at all.
If the curried function is called with arguments, it should return a new function, which can be called with more arguments, to be passed to the underlying callback.
If the curried function (or one of the returned new functions) is called with no arguments, this should be considered the end of the curried function calls, and the callback should be called with every argument that was passed, in the correct order.
For simplicity, you don't need to worry about binding a this context (i.e., you can assume that the callback doesn't reference this).
const sum = (...numbers) => numbers.reduce((total, number) => total + number, 0);
const curriedSum = curry(sum);
curriedSum(); // 0
curriedSum(1)(); // 1
curriedSum(1)(2)(); // 3
curriedSum(1, 2)(3)(4, 5, 6)(); // 21
curriedSum(1); // [Function]
curriedSum(1, 2)(3); // [Function]