D3.js | d3.shuffle() function

Last Updated : 28 Jun, 2019

The d3.shuffle() function in D3.js is used to randomize or shuffle the order of the given array elements in place and returns the array.

Syntax:

d3.shuffle( Array, start, stop )

Parameters: This function accepts three parameters as mentioned above and described below:

Array: This parameter holds the array elements.
start: It represents the starting index of array to shuffle the array elements. It start value not specifies then it takes zero as default value.
stop: It represent the ending index of array to shuffle the array elements. Its default value is the length of array.

Return Value: It returns the array of shuffled elements.

Below programs illustrate the d3.shuffle() function in D3.js:

Example 1:

<!DOCTYPE html> 
<html> 
  
<head> 
    <title>d3.shuffle() Function</title> 
      
    <script src='https://d3js.org/d3.v4.min.js'></script> 
</head> 
  
<body> 
    <script> 
       
        // Initialising some array of elements 
        Array1 = [1, 2, 3, 4]; 
        Array2 = [10, 20, 30, 40]; 
        Array3 = [5, 7, 9, 11]; 
        Array4 = [2, 4, 6, 8, 10]; 
           
        // Calling to d3.shuffle() function 
        A = d3.shuffle(Array1); 
        B = d3.shuffle(Array2, 1, 3); 
        C = d3.shuffle(Array3); 
        D = d3.shuffle(Array4, 2, 5); 
           
        // Getting the shuffled elements 
        document.write(A + "<br>"); 
        document.write(B + "<br>"); 
        document.write(C + "<br>"); 
        document.write(D + "<br>"); 
    </script> 
</body> 
  
</html> 

Output:

2, 3, 1, 4
20, 40, 10, 30
11, 9, 5, 7
2, 10, 4, 8, 6

Example 2:

<!DOCTYPE html> 
<html> 
  
<head> 
    <title>d3.shuffle() Function</title> 
      
    <script src='https://d3js.org/d3.v4.min.js'></script> 
</head> 
  
<body> 
    <script> 
       
        // Initialising some array of elements 
        Array1 = ["a", "b", "c"]; 
        Array2 = ["z", "y", "x"]; 
           
        // Calling to d3.shuffle() function 
        A = d3.shuffle(Array1); 
        B = d3.shuffle(Array2); 
           
        // Getting the shuffled elements 
        document.write(A + "<br>"); 
        document.write(B + "<br>"); 
    </script> 
</body> 
  
</html> 