js实现字符串数组转换成数字数组的几种方式
1. 遍历方式实现
var turnNum = function(nums){for(let i=0;i<nums.length;i++){nums[i] = parseInt(nums[i])} return nums;}console.log(turnNum(['1','2','3']))// [1,2,3]
2. Array map() 方法
var turnNum = function(nums){return nums.map(Number);}console.log(turnNum(['1','2','3'])) // [1,2,3]
3. forEach()方法
var nums = ['1','2','3']nums.forEach((item,index) =>{nums[index] = parseInt(nums[index])})console.log(nums) // [1,2,3]