2626. Array Reduce Transformation

https://leetcode.com/problems/array-reduce-transformation

Javascript

var reduce = function(nums, fn, init) {
    let accu = init
    for (let i=0; i<nums.length; i++) {
        accu = fn(accu, nums[i])
    }
    return accu
};

Typescript

type Fn = (accum: number, curr: number) => number

function reduce(nums: number[], fn: Fn, init: number): number {
    let accu = init
    for (let i=0; i<nums.length; i++) {
        accu = fn(accu, nums[i])
    }
    return accu
};