跳转至LeetCode

题目描述

代码

/**
 * @param {number[]} nums
 * @param {number} target
 * @return {number[]}
 */
var twoSum = function(nums, target) {
    const len = nums.length
    let map = new Map()
    for (let i = 0; i < len; i++ ) {
        const item = nums[i]
        if (map.has(item)) {
            return [map.get(item), i]
        } else {
            map.set(target - item, i)
        }
    }
};