recursive
gleam add recursive
import gleam/io
import recursive
pub fn main() {
// Factorial
io.debug({
use it, f <- recursive.use_fix(10)
case it {
0 -> 1
_ -> it * f(it - 1)
}
})
let fac = recursive.fix(fn (it, f) {
case it {
0 -> 1
_ -> it * f(it - 1)
}
})
// Tail recursive factorial
io.debug({
use it, res, f <- recursive.use_fix2(10, 1)
case it {
0 -> res
_ -> f(it - 1, res * it)
}
})
let memo_fac = recursive.fix2(fn (it, res, f) {
case it {
0 -> res
_ -> f(it - 1, res * it)
}
})
// Tail recursive fibonacci
io.debug({
use it, curr, prev, f <- recursive.use_fix3(9, 1, 0)
case it {
0 -> curr
_ -> f(it - 1, curr + prev, curr)
}
})
let fib = recursive.fix3(fn (it, curr, prev, f) {
case it {
0 -> curr
_ -> f(it - 1, curr + prev, curr)
}
})
}
Further documentation can be found at https://hexdocs.pm/recursive.
Development
gleam test