JavaScript之给定一个整数数组nums和一个整数目标值target，在该数组中找出和为目标值target的那两个整数，并返回它们的数组下标

Posted 2022-03-03 web半晨

目录

• 1、indexOf
• 2、双for

---

1、indexOf

function twoSum(nums, target) 
    let i = 0,
        len = nums.length;

    for (; i < len; i++) 
    	if (nums.indexOf(target - nums[i]) > -1) return [i, nums.indexOf(target - nums[i])];


console.log(twoSum([2, 7, 11, 15], 9));
// [0, 1]

---

2、双for

function towSum(nums, target) 
    let i = 0,
        len = nums.length,
        j = null;

    for (; i < len; i++)
        for (j = i + 1; j < len; j++)
            if (nums[i] + nums[j] == target) return [i, j];


console.log(towSum([3, 2, 6, 4], 6));
// [1, 3]