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A Tour of Go Exercise: Fibonacci closure
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| package main | |
| import "fmt" | |
| // fibonacci is a function that returns | |
| // a function that returns an int. | |
| func fibonacci() func() int { | |
| f2, f1 := 0, 1 | |
| return func() int { | |
| f := f2 | |
| f2, f1 = f1, f+f1 | |
| return f | |
| } | |
| } | |
| func main() { | |
| f := fibonacci() | |
| for i := 0; i < 10; i++ { | |
| fmt.Println(f()) | |
| } | |
| } |
Author
Author
func fibonacci() func() int {
r0, r1 := 0,1
return func() int {
r0, r1 = r1, r0 + r1
return r0
}
}
the temporary variable f is useless.
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it is very concise version of Fibonacci closure.