1.

What does “javascript:void(0)” mean?

Answer»

Let’s say the following is your array:

VAR a = [99, 150, 299, 340, 390, 450, 590, 600];

Now, get the length of the array:

var len = a.length;

Loop until the length of the array is more than 0. Use Math.random() to RANDOMIZE the elements. Decrement the value of len (length) after every iteration for each element:

while (len > 0) {      index = Math.floor(Math.random() * len);      len--;      t = a[len];              a[len] = a[index];                   a[index] = t;       }  

The following is an example that shuffles an array:

<html>        <body>                     <script>            function SHOW(a) {                   var len = a.length;             var t, index;               while (len > 0) {                  index = Math.floor(Math.random() * len);                  len--;                  t = a[len];                          a[len] = a[index];                          a[index] = t;                   }                 return a;              }                  var a = [99, 150, 299, 340, 390, 450, 590, 600];          document.write("Array = "+a);          document.write("<br>SHUFFLING the array = "+show(a));          </script>              </body> </html>

The output:

Array = 99,150,299,340,390,450,590,600 Shuffling the array = 390,340,150,590,99,450,299,600


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