weird-go.go

weirg_go.go

package main

import (
	"fmt"
)

func a ()[]int {
	var arr [16]int
	for i := range arr {
		arr[i] = i
	}
	return arr[:]
}

func b (arr []int) {
	for i := range arr {
		arr[i] = -i
	}
}

// this example shows slice is actually a referece, the underlying is invisiable in many cases.
// we need to understand this in case use stale or corrupted data. 
func main() {
	arr := a ()
	fmt.Println(arr)
	 
	 // modify the underlying array 
	b (arr)
	fmt.Println(arr)
}