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

The map.entries() function in D3.js used to return an array of key-value objects for the entry in the created map.

Syntax:

d3.map.entries();

Parameters: This function does not accept any parameter.



Return Value: This function returns an array of key-value pair for the entry in the created map.

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

Example 1:

filter_none

edit
close

play_arrow

link
brightness_4
code

<!DOCTYPE html>
<html>
    
<head>
    <title>d3.map.entries() Function</title>
    
    <script src='https://d3js.org/d3.v4.min.js'></script>
</head>
  
<body>
  <script>
       
     // Creating a map
     var map1 = d3.map({"a": 1});
     var map2 = d3.map({"GFG": 5});
       
     // Calling the map.entries() function
     A = map1.entries();
     B = map2.entries();
       
     // Getting the array of key value pair
     console.log(A);
     console.log(B);
  </script>
</body>
  
</html>

chevron_right


Output:

[{"key":"a", "value":1}]
[{"key":"GFG", "value":5}]

Example 2:

filter_none

edit
close

play_arrow

link
brightness_4
code

<!DOCTYPE html>
<html>
    
<head>
    <title>d3.map.entries() Function</title>
    
    <script src='https://d3js.org/d3.v4.min.js'></script>
</head>
  
<body>
  <script>
       
     // Creating a map
     var map1 = d3.map({"Ram": 5}, {"Geek": 10});
     var map2 = d3.map();
       
     // Calling the map.entries() function
     A = map1.entries();
     B = map2.entries();
       
     // Getting the array of key value pair
     console.log(A);
     console.log(B);
  </script>
</body>
  
</html>

chevron_right


Output:

[{"key":"Ram", "value":5}]
[]

Note: Map2 was null that is why it’s became blank.

Reference: https://devdocs.io/d3~5/d3-collection#map_entries



My Personal Notes arrow_drop_up

Check out this Author's contributed articles.

If you like GeeksforGeeks and would like to contribute, you can also write an article using contribute.geeksforgeeks.org or mail your article to contribute@geeksforgeeks.org. See your article appearing on the GeeksforGeeks main page and help other Geeks.

Please Improve this article if you find anything incorrect by clicking on the "Improve Article" button below.




Article Tags :

Be the First to upvote.


Please write to us at contribute@geeksforgeeks.org to report any issue with the above content.