JS "Practice" with JS wrapper Java Shuffle function (scrambled array subscript method)

This method returns a completely new array so it does not return a reference array like the shuffle function in Java.

Ideas are as follows:

1. Create a new function passing in an array that needs to scramble the subscript

2. Get the length of the array

3. Create a new array to save and return the result

4, according to the length of the array to create a new random number (random number remember to take down the whole or will subscript out of bounds)

5, Loop added to the result array inside

The code is as follows:

<script type= "Text/javascript" >varTestarr =NewArray ("China", "United States", "England", "France", "Germany", "Spain", "Greece",
"Italy", "Japan", "Korea", "Nigeria", "India"); varNEWARR =Shuffle (Testarr);          Console.log (NEWARR); functionShuffle (arry) {varSortarr =NewArray (); varlen = arry.length;//get Array length specify random number of times                  for(vari = 0; I <Len;) {            varindex = Math.floor (Math.random () *Len); if(Arry[index]! =NULL) {Sortarr.push (Arry[index]); I++; Arry[index]=NULL; }        }        returnSortarr; }    </script>

JS "Practice" with JS wrapper Java Shuffle function (scrambled array subscript method)