純js實現陣列去重
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>陣列去重</title>
<script>
思路:
1.遍歷陣列中的元素;
2.將陣列中的元素轉化為物件的屬性;
判斷元素中已經存在該屬性,則屬性值加一,如果沒有存在,則新增屬性,講述性質設定為1;
3. 將得到的物件轉化為新的陣列;
var array = ['c','a','z','a','x','a'];
var newArray = [];
var arr = {};
function clear(array){
for(var i = 0;i<array.length;i++){
var item = array[i];
if(arr[item] != undefined){
arr[item]++;
}else {
arr[item] = 1;
}
console.log(arr);
}
for(var key in arr){
newArray.push(key);
}
return newArray;
}
var newarray = clear(array);
console.log(newarray);
</script>
</head>
<body>
</body>
</html>