javascript - Javascript 中的 Atbash 密码

Question

作为序言，我对 JS 还很陌生，所以我的错误可能非常初级。

我正在尝试为 Atbash 密码制作一个解码器，它只是反转字母表。Z=A，Y=B，以此类推。

这是我所拥有的：

decode("ZYX");
function decode(message) {
var alphabet = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
var tebahpla = "ZYXWVUTSRQPONMLKJIHGFEDCBA";
var decoded_string = "";

for (i = 0; i < message.length; i++) {
    var coded_letter = message.charAt(i);
    var letter_index = alphabet.indexOf(coded_letter);
    var decoded_letter = tebahpla.charAt(letter_index);
    decoded_string = decoded_string + decoded_letter;
}
return decoded_string;
}

Answer 1

public class CifradoAtbash {

public String EnAtbash(String mensage) {    

    String alphabet = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
    String tebahpla = "ZYXWVUTSRQPONMLKJIHGFEDCBA";
    String alphabet1 = "abcdefghijklmnopqrstuvwxyz";
    String tebahpla1 = "zyxwvutsrqponmlkjihgfedcba";
    String decoded_string = "";

    for (int i = 0; i < mensage.length(); i++) {
        char coded_letra = mensage.charAt(i);
        if (Character.isUpperCase(coded_letra)) {

            int letraPosMayus = alphabet.indexOf(coded_letra);
            char tebLetraPosMayus = tebahpla.charAt(letraPosMayus);

            decoded_string = decoded_string+tebLetraPosMayus;
        }
        else {
            int letraPosMinus1 = alphabet1.indexOf(coded_letra);
            char tebLetraPosMinus1 = tebahpla1.charAt(letraPosMinus1);
            decoded_string = decoded_string + tebLetraPosMinus1;
        }

    }
    return decoded_string;
}

Answer 2

我认为您可以轻松地将@Robert 发布的代码从 Java 转换为 Javascript。我已经修改了代码以保留非字母字符（如空格、数字、标点符号等）：

function enAtbash(mensage) {    

    var alphabet = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
    var tebahpla = "ZYXWVUTSRQPONMLKJIHGFEDCBA";
    var alphabet1 = "abcdefghijklmnopqrstuvwxyz";
    var tebahpla1 = "zyxwvutsrqponmlkjihgfedcba";
    var decoded_string = "";

    for (var i = 0; i < mensage.length; i++) {
        var coded_letra = mensage.charAt(i);
        
	if (/[^a-zA-Z]/.test(mensage[i])) {
		decoded_string = decoded_string+mensage[i];	
	}
	else if (mensage[i] === mensage[i].toUpperCase()) {
	    	var letraPosMayus = alphabet.indexOf(coded_letra);
	    	var tebLetraPosMayus = tebahpla.charAt(letraPosMayus);
	    	decoded_string = decoded_string+tebLetraPosMayus;
        } else {
	    	var letraPosMinus1 = alphabet1.indexOf(coded_letra);
	    	var tebLetraPosMinus1 = tebahpla1.charAt(letraPosMinus1);
	    	decoded_string = decoded_string + tebLetraPosMinus1;
        }

    }
    return decoded_string;
}

document.write(enAtbash("Hello World!"));