sumItem
Add up all items of an array
basic usage
Given an array of items, and an optional function to map each item to a number, add up all the items.
| Parameter | type | Description |
|---|---|---|
| arr | array | |
| func | function |
typescript
import { sumItem } from 'func-dash'
console.log(sumItem([1, 2, 3, 4, 5])) // [15
console.log(sumItem([{ a: 1 }, { a: 2 }, { a: 3 }], item => item.a)) // 6