前言 一位正在学习前端的菜鸟,虽菜,但还未放弃. 给大家画张图了解思路 以下是代码 function randomArr(arr,num){ let newArr = [];//创建一个新数组 for (let i = 0; i < 30; i++) { let temp = Math.floor(Math.random()*arr.length);//取随机下标 newArr.push(arr[temp]);//添加到新数组 arr.splice(temp,1)//删除当前的数组元素,避免重复
////随机生成数组中自定义的个数返回一个字符串数组 function getArrayItems(arr, num) { //新建一个数组,将传入的数组复制过来,用于运算,而不要直接操作传入的数组; var temp_array = new Array(); for (var index in arr) { temp_array.push(arr[index]); } //取出的数值项,保存在此数
最近被算法虐了一下,刷一下leetcode,找找存在感 如题: Given an array of integers, return indices of the two numbers such that they add up to a specific target. You may assume that each input would have exactly one solution, and you may not use the same element twice. Exam
var dataArr = [0,1,2,3,4,5,6,7,8,9,10]; var newArr = []; var s = parseInt(dataArr.length / 4); var n = 0; for (var i = 1; i <= s; i++) { var star = (i - 1) * 4; newArr[n++] = dataArr.slice(star, star + 4); } var y = dataArr.length - s * 4; if (y > 0