数组去重：
<!DCOTYPE>
<html>
<head>
<title>数组去重</title>
<script>
function test(str){
let len = str.length;
let strtmp = [];
for(let i = 0;i<len;i++){
if (strtmp.indexOf(str[i])< 1){
strtmp.push(str[i]);
}
}
console.log(strtmp);
}
let abc = [0,2,3,5,2,1,9,3,9,1];
test(abc);
</script>
</head>
<body>
</body>
</html>查找字符串出现最多的：
<!DCOTYPE>
<html>
<head>
<title>1111</title>
<script src="http://code.jquery.com/jquery-3.3.1.min.js" integrity="sha256-FgpCb/KJQlLNfOu91ta32o/NMZxltwRo8QtmkMRdAu8=" crossorigin="anonymous"></script>
<script>
$(function(){
$('.btn').click(function(){
let num = $('.num').val();
// console.log(num);
let len = num.length;
let json = {};
for (let i=0;i<len;i++){
if(!json[num.charAt(i)]){
json[num.charAt(i)]=1;
}else
{
json[num.charAt(i)]++;
}
}
let max = 0;
let word = '';
for(var i in json){
if (json[i]> max){
max = json [i];
word = i;
}
}
console.log('the word is'+word,'count is'+max);
})
})
</script>
</head>
<body>
<label>awqewqewqewqe</label><input type="text" class="num"></input>
<button class="btn" >22222</button>
</body>
</html>相关推荐：
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