Function countOf

Example

import {tree, from, of, countOf} from 'effect-tree'
import {pipe} from 'effect'

const actual = pipe(
  [of(2), from(3, of(4), of(5)), of(6)],
  tree.flipped(1),
  countOf(n => n % 2 === 0),
)

expect(actual).toBe(3)
Copy