Function search

javascript/0287-find-the-duplicate-number.js:174–183

(nums)

const isSame = (a, b) => a === b;

const search = (nums) => {
    for (let index = 0; index < nums.length; index++) {
        /* Time O(N) */
        const [num, arrayIndex] = [nums[index], index + 1];

        if (!isSame(num, arrayIndex)) return num;
    }

    return nums.length;
};

/**
 * https://leetcode.com/problems/find-the-duplicate-number/