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A brief introduction to the method of removing duplicate items from an array in JS

怪我咯
Release： 2017-07-07 15:07:35
Original
1098 people have browsed it

This article mainly introduces the method of JS to simply remove duplicate items in array, involving javascript traversal, judgment and operation related operation skills for array , Friends who need it can refer to

The example in this article describes a simple JS method to remove duplicate items in an array. Share it with everyone for your reference, the details are as follows: 

<!DOCTYPE html>
<html lang="zh-cn">
<head>
<meta charset="UTF-8">
<title></title>
</head>
<body>
<script>
var arr = ["aaa","bbb","aaa","ccc","ddd","ccc"];
function unique(arr) {
  var result = [], hash = {};
  for (var i = 0, elem; (elem = arr[i]) != null; i++) {
    if (!hash[elem]) {
      result.push(elem);
      hash[elem] = true;
    }
  }
  return result;
}
console.info(unique(arr));
</script>
</body>
</html>
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