Go 言語の for ループを使用して、flip 関数をすばやく実装します。

package main

import (
    "fmt"
)

func reverseString(str string) string {
    runes := []rune(str)
    for i, j := 0, len(runes)-1; i < j; i, j = i+1, j-1 {
        runes[i], runes[j] = runes[j], runes[i]
    }
    return string(runes)
}

func main() {
    str := "Hello, World!"
    fmt.Println("Original string:", str)
    reversedStr := reverseString(str)
    fmt.Println("Reversed string:", reversedStr)
}

package main

import (
    "fmt"
)

func reverseArray(arr []int) {
    for i, j := 0, len(arr)-1; i < j; i, j = i+1, j-1 {
        arr[i], arr[j] = arr[j], arr[i]
    }
}

func main() {
    arr := []int{1, 2, 3, 4, 5}
    fmt.Println("Original array:", arr)
    reverseArray(arr)
    fmt.Println("Reversed array:", arr)
}