A TypeScript function that converts aggregating functions into currying functions if they have the same types. Original idea by Jaco Pretorius.

curry.ts

type aggregateFn<T> = (...args: T[]) => T;

interface curryFn<T> extends aggregateFn<T> {
  (...args: T[]): curryFn<T>;
}

const curry = <T>(fn: aggregateFn<T>): curryFn<T> => (
  ...args: any[]
): curryFn<any> | any => 
  args.length ? curry(fn.bind.apply(fn, [undefined].concat(args))) : fn();

  
const adder = (...subNumbers: number[]) => subNumbers.reduce((acc, itm) => acc += itm, 0)
  
console.log(adder(1,2,3,4,5)) // 15
  
const curryAdder = curry(adder)
  
console.log(curryAdder(1)(2)(3)(4)(5)()) // 15