| Andrew Gerrand | d528f52 | 2012-03-15 17:44:47 +1100 | [diff] [blame] | 1 | package main |
| 2 | |
| Brad Fitzpatrick | a5e10ed | 2012-11-26 13:05:18 -0800 | [diff] [blame] | 3 | import "fmt" |
| 4 | |
| Andrew Gerrand | d528f52 | 2012-03-15 17:44:47 +1100 | [diff] [blame] | 5 | // fib returns a function that returns |
| 6 | // successive Fibonacci numbers. |
| 7 | func fib() func() int { |
| 8 | a, b := 0, 1 |
| 9 | return func() int { |
| 10 | a, b = b, a+b |
| 11 | return a |
| 12 | } |
| 13 | } |
| 14 | |
| 15 | func main() { |
| 16 | f := fib() |
| 17 | // Function calls are evaluated left-to-right. |
| Brad Fitzpatrick | a5e10ed | 2012-11-26 13:05:18 -0800 | [diff] [blame] | 18 | fmt.Println(f(), f(), f(), f(), f()) |
| Andrew Gerrand | d528f52 | 2012-03-15 17:44:47 +1100 | [diff] [blame] | 19 | } |
