restructured code (f1a4d352) · Commits · bsmrgo / playground

iterators/iterators.go

+15 −7

Original line number	Diff line number	Diff line
		@@ -2,6 +2,8 @@ package iterators

		import "math/big"

		// https://en.wikipedia.org/wiki/Fibonacci_number

		// FibonacciNumber ...
		type FibonacciNumber struct {
		current *big.Int
		@@ -16,14 +18,20 @@ func NewFibonacciNumberIterator() *FibonacciNumber {
		}
		}

		// Value ...
		func (fn FibonacciNumber) Value() big.Int {
		return fn.current
		}

		// Next ...
		func (f FibonacciNumber) Next() big.Int {
		r := f.current
		func (fn FibonacciNumber) Next() big.Int {
		//r := f.current
		//n := big.NewInt(0)
		//n.Add(f.next, f.current)
		//f.current = f.next
		//f.next = n

		n := big.NewInt(0)
		n.Add(f.next, f.current)
		f.current = f.next
		f.next = n
		fn.current, fn.next = fn.next, fn.current.Add(fn.next, fn.current)

		return r
		return fn.current
		}

+3 −2

Original line number	Diff line number	Diff line
		@@ -6,7 +6,8 @@ import (

		func TestIterators1(t *testing.T) {
		fn := NewFibonacciNumberIterator()
		for i := 0; i < 100; i++ {
		t.Logf("F(%d): %s", i, fn.Next())
		for i := 0; i < 20; i++ {
		t.Logf("F(%d): %s", i, fn.Value())
		fn.Next()
		}
		}