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A Tour of Go Exercise: Fibonacci closure
Let‘s have some fun with functions.
Implement a fibonacci function that returns a function (a closure) that returns successive fibonacci numbers.
package mainimport "fmt"// fibonacci is a function that returns// a function that returns an int.func fibonacci() func() int { before := 0 now := 0 return func() int { if before == 0 { before++ return before } if now == 0 { now++ return now } temp := now now = before + now before = temp return now }}func main() { f := fibonacci() for i := 0; i < 10; i++ { fmt.Println(f()) }}
A Tour of Go Exercise: Fibonacci closure
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