D3.js | d3.map.set() Function

0 0 1 minute read

The map.set() function in D3.js used to set the values for the specified key string in to the created map.

Syntax:

d3.map.set(key, value);

Parameters: This function accepts two parameters which are illustrated below:

key: This is the key string.
value: This is the corresponding value for each key string.

Return Value: This function does not return any values.

Below programs illustrate the d3.map.set() function in D3.js:
Example 1:

<!DOCTYPE html> 
<html> 
  
<head> 
   <title>d3.map.set() function</title> 
  
   <script src = "https://d3js.org/d3.v4.min.js"></script> 
</head> 
     
<body> 
    
  <script> 
      
     // Creating a map 
     var map = d3.map() 
       
     // setting the value for the specified key string 
     // into above map 
     .set("a", 1).set("b", 2).set("c", 3); 
  
     // Getting the value for the specified key string 
     A = map.get("a");  
     B = map.get("c");  
      
     // Printing the output of values 
     console.log(A); 
     console.log(B); 
  </script> 
</body> 
  
</html> 

Output:

1
3

Example 2:

<!DOCTYPE html> 
  
<html> 
  
<head> 
   <title>d3.map.set() function</title> 
  
   <script src = "https://d3js.org/d3.v4.min.js"></script> 
</head> 
  
<body> 
    
  <script> 
      
     // Creating a map and setting the value 
     // for the specified key string 
     var map = d3.map().set("Geeks", 1).set("Geek", 2).set("gfg", 3); 
  
     // Getting the value for the specified key string 
     A = map.get("Geek");  
     B = map.get("c");  
      
     // Printing the output of values 
     console.log(A); 
     console.log(B); 
  </script> 
</body> 
  
</html> 