<!DOCTYPE HTML>
<html >
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>数组</title>
<script type="text/javascript">
//创建数组
var arr = ['*','##',"***","&&","****","##*"];
arr[7] = "**";
//显示数组长度
alert("数组的长度为："+arr.length)
//将数组内容输出，完成达到的效果。
document.write(arr[0]+"<br>");
document.write(arr[7]+"<br>");
document.write(arr[2]+"<br>");
document.write(arr[4]+"<br>");
</script>
</head>
<body>
</body>
</html>
2020-08-12
确实挺简单的
<!DOCTYPE HTML>
<html >
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>数组</title>
<script type="text/javascript">
//创建数组
var arr = ['*','##',"***","&&","****","##*"];
arr[7] = "**";
//显示数组长度
alert(arr.length);
//将数组内容输出，完成达到的效果。
var arr2 = arr.filter(item => item >= '*')
arr2.sort()
arr2.forEach((v,i) => {
document.write(`${arr2[i]}<br/>`);
});
</script>
</head>
<body>
</body>
</html>
var arr = ['*','##',"***","&&","****","##*"];
arr[7] = "**";
arr = arr.filter(res=>{
if(res.indexOf("*")!= -1 && res.indexOf("#") == -1){
return res
}
})
for (var i = 0; i < arr.length; i++) {
// 拿到每个数arr[i]，再去遍历 i 后面的数去做比较
for (var j = i + 1; j < arr.length; j++) {
if (arr[i].length > arr[j].length) {
var tmp = arr[i]
arr[i] = arr[j]
arr[j] = tmp
}
}
document.write(arr[i]+"<br>");
}
举报
