如图：css/less代码： #searchDiv {
width: 4rem;
margin: 0.5rem auto;
height: 0.4rem;
background-color: #C40000;
padding: 1p...
eg:let i=5;
let j=10;
console.log(i);
console.log(j);
[i,j]=[j,i];
console.log(i);
console.log(j);
//i和j不必借助第三个变量，即可交换数值
eg:let n=matr...
使用php来解决创建一个php文件down.php，用php来将中文转码：<?php
header("Content-type: text/html; charset=utf-8");
$url=$_GET["url"];
$...
代码：function json(){
$i=0;
foreach ($temp as $v) {
$result[$i]=array(
"name"=>$v,
"size"=>$siz...
