sumBy

Calculates the sum of values in an array based on a provided function.

Usage

import { sumBy } from 'rattail'

sumBy([{ n: 1 }, { n: 2 }, { n: 3 }], ({ n }) => n) // return 6

Arguments

Arg	Type	Defaults
arr	Array
fn	(val: any) => number

Return

Type
number