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JS implements string and array deduplication method

php中世界最好的语言Original: 2018-04-27 14:02:531842browse

This time I will bring you js implementation String and array deduplication methods, js implementation of string and array deduplication What are the precautions , the following is a practical case, Let’s take a look.

The example in this article describes the method of JS to implement string deduplication and array deduplication. Share it with everyone for your reference, the details are as follows:

<!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>

Running results:

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

JS implements string and array deduplication method

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