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<title>Document</title>
<script>
//indexof的使用如果要检索的字符串值没有出现，则该方法返回 -1。
var arr1 = [1, 2, 2, 3, 3, 3, 3, 4, 4, 5];
var newArr = [];
function distinct(arr) {
// 函数主体
for (var i = 0; i < arr1.length; i++) {
if (newArr.indexOf(arr[i]) === -1) {
newArr.push(arr[i]);
}
}
}
distinct(arr1); // 输出[1,2,3,4,5]
console.log(newArr);
</script>
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