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:
<!DOCTYPE html>
<html>
<head>
<title>d3.map.entries() Function</title>
</head>
<body>
<script>
var map1 = d3.map({ "a" : 1});
var map2 = d3.map({ "GFG" : 5});
A = map1.entries();
B = map2.entries();
console.log(A);
console.log(B);
</script>
</body>
</html>
|
Output:
[{"key":"a", "value":1}]
[{"key":"GFG", "value":5}]
Example 2:
<!DOCTYPE html>
<html>
<head>
<title>d3.map.entries() Function</title>
</head>
<body>
<script>
var map1 = d3.map({ "Ram" : 5}, { "Geek" : 10});
var map2 = d3.map();
A = map1.entries();
B = map2.entries();
console.log(A);
console.log(B);
</script>
</body>
</html>
|
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
Last Updated :
28 Jun, 2019
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