addOrElse

function Set.addOrElse(target, value, orElse)

Example

data-first

import { Set } from "@monstermann/set";

Set.addOrElse(Set.create([1, 2]), 3, (set) => set.size); // Set([1, 2, 3])
Set.addOrElse(Set.create([1, 2]), 2, (set) => set.size); // 2

data-last

import { Set } from "@monstermann/set";

pipe(
    Set.create([1, 2]),
    Set.addOrElse(3, (set) => set.size),
); // Set([1, 2, 3])

pipe(
    Set.create([1, 2]),
    Set.addOrElse(2, (set) => set.size),
); // 2