ref

gleam add ref

import ref

pub fn main() {
  let myref = ref.cell(0)
  io.debug(ref.get(myref))
  // -> 0

  ref.set(myref, fn(a) { a + 1 })
  ref.set(myref, fn(a) { a + 1 })
  ref.set(myref, fn(a) { a + 1 })

  io.debug(ref.get(myref))
  // -> 3
}

Further documentation can be found at https://hexdocs.pm/ref.