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js method to implement simple permutation and combination_javascript skills

WBOYOriginal: 2016-05-16 15:17:381302browse

The example in this article describes how to implement simple permutation and combination in js. Share it with everyone for your reference, the details are as follows:

The screenshot of the running effect is as follows:

The specific code is as follows:

<!DOCTYPE html>
<html>
 <head>
  <title>demo</title>
  <script type="text/javascript">
   var str = [1,2,3,4,5];
   var count = 0;
   function arrange(s){
    for(var i=0,length=str.length; i<length; i++) {
     if(s.length == length - 1) {
      if(s.indexOf(str[i]) < 0) {
       count++;
       console.log("组合"+count+"="+s + str[i]);
      }
      continue;
     }
     if(s.indexOf(str[i]) < 0) {
      arrange(s+str[i]);
     }
    }
   }
   arrange("");
  </script>
 </head>
 <body>
 </body>
</html>

Readers who are interested in more content related to JavaScript algorithms can check out the special topics on this site: "Summary of JavaScript mathematical operation usage", "Summary of JavaScript sorting algorithms", "Summary of JavaScript traversal algorithms and techniques" and "Summary of JavaScript data structures and algorithm techniques"

I hope this article will be helpful to everyone in JavaScript programming.

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