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An answer of the exercise: Fibonacci closure on a tour of Go
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package main | |
import "fmt" | |
// Very naive answer. | |
// fibonacci is a function that returns | |
// a function that returns an int. | |
func fibonacci() func() int { | |
n := 0 | |
a := 0 | |
b := 1 | |
c := a + b | |
return func() int { | |
var ret int | |
switch { | |
case n == 0: | |
n++ | |
ret = 0 | |
case n == 1: | |
n++ | |
ret = 1 | |
default: | |
ret = c | |
a = b | |
b = c | |
c = a + b | |
} | |
return ret | |
} | |
} | |
func main() { | |
f := fibonacci() | |
for i := 0; i < 10; i++ { | |
fmt.Println(f()) | |
} | |
} |
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