提供2种数组去重的方法
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<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<script>
var arr = ['c', 'a', 'b', 'a', 'r', 'b', 'r', 'o', 'j', 'o']
function unique(arr) {
var newArr = [];
for (var i = 0; i < arr.length; i++) {
if (newArr.indexOf(arr[i]) === -1) {
newArr.push(arr[i]);
}
}
return newArr;
}
var demo = unique(arr);
console.log(demo);
arr1 = Array.from(new Set(arr));
console.log(arr1);
</script>
</head>
<body>
</body>
</html>
输出：
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