DDSA Solutions

2626. Array Reduce Transformation

UnknownView on LeetCode
JavaScript

Problem Overview

Array Reduce Transformation is a unknown-difficulty LeetCode problem. This is a common JavaScript pattern in coding interviews. Study the solution below and note the time and space complexity before attempting variations on your own.

A full step-by-step explanation is being added. See the study guide for pattern-based practice.

Read the solution code below and trace through it on paper before submitting. For structured interview prep, follow our 30-day study guide.

2626.ts
TypeScript
type Fn = (accum: number, curr: number) => number

function reduce(nums: number[], fn: Fn, init: number): number {
    let ans = init;
    for (const num of nums) {
        ans = fn(ans, num);
    }
    return ans;
};
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