reverses a slice in place

new_reverse.go

package main

import "fmt"

func reverse[T any](s []T) {
	for i, j := 0, len(s)-1; i < j; i, j = i+1, j-1 {
		s[i], s[j] = s[j], s[i]
	}
}

func main() {
	a := [...]int{0, 1, 2, 3, 4, 5}
	reverse(a[:])
	fmt.Println(a) // "[5 4 3 2 1 0]"
}