Golang for Fibonacci

刚接触golang，写fib()感觉还是比较惊艳的。

// fib.go
package main
import "fmt"

func fib() func() int{
    first,second := 0,1
    return func() int{
        ret := first    
        first,second = second,first+second
        return ret
    }
}

func main(){
    f := fib()    //函数赋给变量
    for i := 0; i<1000; i++{
        fmt.Println(f())
    }
}

4GB内存下结果：
time ./fib 0.00s user 0.00s system 64% cpu 0.010 total