gonads/thunk_test.go

package gonads

import (
	"testing"
)

func Fib(n int) int {
	if n <= 1 {
		return n
	}
	return Fib(n-1) + Fib(n-2)
}

func TestRecurFib(t *testing.T) {
	t.Log(Fib(40))
}

func TestThunkFib(t *testing.T) {
	cache := make([]Thunk[int], 41)
	cache[0].o.Set(0)
	cache[1].o.Set(1)

	var fib func(int) int
	fib = func(n int) int {
		if cache[n].o.IsSome() {
			return *cache[n].o.val
		}
		return fib(n-1) + fib(n-2)
	}
	
	for i := range cache {
		i := i
		cache[i].doer = func() int { return fib(i) }
	}

	t.Log(cache[40].Force())
}