数组去重的方法

<script>

var arr = [1,2,1,3,1,2,5,4,7,5,8,4,1,4,5];

var obj = [];

var tem = [];

for(var i = 0;i < arr.length;i++){

if(!obj[arr[i]]){

obj[arr[i]] = 1;

tem.push(arr[i]);

}

}

console.log(tem)

</script>

<script>

var arr = [5,6,1,8,2,3,4,9,2,5,6];

var arr2= [];

for(var i=0;i<arr.length;i++){

if(arr2.indexOf(arr[i]) < 0){

arr2.push(arr[i]);

}

}

 

console.log(arr)

</script>