D3.js count() method
Last Updated :
06 Apr, 2023
With the help of d3.count() method, we can get the count of valid values in the specified iterable data structure.
Syntax:
d3.count(iterable[, accessor])
Return value: It returns the count of valid values.
Note: To execute the below examples you have to install the d3 library by using the command prompt for the following command.
npm install d3
Example 1: In this example, we can see that by using d3.count() method, we are able to get the count of valid values in the specified iterables.
Javascript
const d3 = require( 'd3' );
data = [
{ name: "ABC" , amount: "34.0" , date: "11/12/2015" },
{ name: "DEF" , amount: "120.11" , date: "11/12/2015" },
{ name: "MNO" , amount: "12.01" , date: "01/04/2016" },
{ name: "ABC" , amount: "34.05" , date: "01/04/2016" }
]
let gfg = d3.count(data, d => d.amount);
console.log(gfg);
|
Output:
4
Example 2:
Javascript
const d3 = require( 'd3' );
data = [
{ name: "ABC" , amount: "34.0" , age: 20 },
{ name: "DEF" , amount: "120.11" , age: NaN },
{ name: "MNO" , amount: "12.01" , age: 23 },
{ name: "DEF" , amount: "34.05" , age: 24 }
]
let gfg = d3.count(data, d => d.age);
console.log(gfg);
|
Output :
3
Share your thoughts in the comments
Please Login to comment...