How to use js to achieve string deduplication and array deduplication

php中世界最好的语言Original: 2018-06-02 14:32:391569browse

This time I will show you how to use js to achieve string deduplication and array deduplication. What are the things to note when using js to achieve string deduplication and array deduplication? , the following is a practical case, let’s take a look.

<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>js数组、字符串去重</title>
</head>
<body>
  <script type="text/javascript">
  /*数组去重*/
    function quchong(arr){
      var len = arr.length;
      arr.sort();
      for(var i=len-1;i>0;i--){
        if(arr[i]==arr[i-1]){
          arr.splice(i,1);
        }
      }
      return arr;
    }
    var a = ["a","a","b",'b','c','c','a','d'];
    var b = quchong(a);
    console.log(b);
  /*字符串去重*/
  function quchongstr(str){
    var a = str.match(/\S+/g);//等价于str.split(/\s+/g)// \s空白符，\S非空白符
    a.sort();
    for(var i=a.length-1;i>0;i--){
      if(a[i]==a[i-1]){
        a.splice(i,1);
      }
    }
    return a.join(" ");
  }
  var str = quchongstr("a a b a b e");
  console.log(str);
  </script>
</body>
</html>

Run results:

I believe you have mastered the method after reading the case in this article. For more exciting information, please pay attention to other related articles on the php Chinese website!

How to use js to achieve string deduplication and array deduplication

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