How to use js to achieve string deduplication and array deduplication-JS Tutorial-php.cn

How to use js to achieve string deduplication and array deduplication

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Release： 2018-06-02 14:32:39

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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>

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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!