AS3 密码解码器和编码器（更好的答案？）

Question

昨天晚上，小弟问我有没有可能做一个程序，把字母表中的每个字母替换成另一个字母，把它变成一个代码，然后再把它变回原来的状态。

所以我做了这个：http://www.skyetheguy.com/novatranslationtool

从各方面来看，它都能完成工作，但我觉得，从代码的角度来看，它很笨拙，而且我真的很想提高我对循环等事物的了解...

编辑： 上面已经更新了 DodgerThud 的惊人答案并且像梦一样工作。 :) 梦想成真！

此外，这简直是天上掉馅饼，但如果能处理超过两个字符的内容，那就太棒了。我的代码绝对不会那样做。但是，你知道的，所有那些带有撇号的有趣代码......好东西！

stop();

// SET-UP STUFF
inputText.alpha = .5;
outputText.alpha = .5;
inputText.borderColor = 0xCCCCCC;
outputText.borderColor = 0xCCCCCC;
var textinProgress:String;
textinProgress = inputText.text;
if (textinProgress.charAt(0) == "\r") {
    inputText.text = "";
}
stage.addEventListener(Event.ENTER_FRAME, refresh_frame1);
function refresh_frame1(e:Event):void {
    inputScroll.update();
    outputScroll.update();
}
// ORIGINAL ALPHABET
var letters_aArray:Array = new Array();
letters_aArray[0] = "a";
letters_aArray[1] = "b";
letters_aArray[2] = "c";
letters_aArray[3] = "d";
letters_aArray[4] = "e";
letters_aArray[5] = "f";
letters_aArray[6] = "g";
letters_aArray[7] = "h";
letters_aArray[8] = "i";
letters_aArray[9] = "j";
letters_aArray[10] = "k";
letters_aArray[11] = "l";
letters_aArray[12] = "m";
letters_aArray[13] = "n";
letters_aArray[14] = "o";
letters_aArray[15] = "p";
letters_aArray[16] = "q";
letters_aArray[17] = "r";
letters_aArray[18] = "s";
letters_aArray[19] = "t";
letters_aArray[20] = "u";
letters_aArray[21] = "v";
letters_aArray[22] = "w";
letters_aArray[23] = "x";
letters_aArray[24] = "y";
letters_aArray[25] = "z";
// NEW ALPHABET
var letters_bArray:Array = new Array();
letters_bArray[0] = "m";
letters_bArray[1] = "n";
letters_bArray[2] = "b";
letters_bArray[3] = "v";
letters_bArray[4] = "c";
letters_bArray[5] = "x";
letters_bArray[6] = "z";
letters_bArray[7] = "l";
letters_bArray[8] = "k";
letters_bArray[9] = "j";
letters_bArray[10] = "h";
letters_bArray[11] = "g";
letters_bArray[12] = "f";
letters_bArray[13] = "d";
letters_bArray[14] = "s";
letters_bArray[15] = "a";
letters_bArray[16] = "p";
letters_bArray[17] = "o";
letters_bArray[18] = "i";
letters_bArray[19] = "u";
letters_bArray[20] = "y";
letters_bArray[21] = "t";
letters_bArray[22] = "r";
letters_bArray[23] = "e";
letters_bArray[24] = "w";
letters_bArray[25] = "q";
// ENCODE BUTTON
encode_btn.addEventListener(MouseEvent.CLICK, encode_btnclick);

function encode_btnclick(event:MouseEvent):void
{
    textinProgress = inputText.text;
    outputText.text = "";
    for (var b=0; b<textinProgress.length; b++) {
        if (textinProgress.charAt(b).search(letters_aArray[0]) == 0) {
            outputText.appendText(letters_bArray[0]);
        } else if (textinProgress.charAt(b).search(letters_aArray[0].toUpperCase()) == 0) {
            outputText.appendText(letters_bArray[0].toUpperCase());
        } else if (textinProgress.charAt(b).search(letters_aArray[1]) == 0) {
            outputText.appendText(letters_bArray[1]);
        } else if (textinProgress.charAt(b).search(letters_aArray[1].toUpperCase()) == 0) {
            outputText.appendText(letters_bArray[1].toUpperCase());
        } else if (textinProgress.charAt(b).search(letters_aArray[2]) == 0) {
            outputText.appendText(letters_bArray[2]);
        } else if (textinProgress.charAt(b).search(letters_aArray[2].toUpperCase()) == 0) {
            outputText.appendText(letters_bArray[2].toUpperCase());
        } else if (textinProgress.charAt(b).search(letters_aArray[3]) == 0) {
            outputText.appendText(letters_bArray[3]);
        } else if (textinProgress.charAt(b).search(letters_aArray[3].toUpperCase()) == 0) {
            outputText.appendText(letters_bArray[3].toUpperCase());
        } else if (textinProgress.charAt(b).search(letters_aArray[4]) == 0) {
            outputText.appendText(letters_bArray[4]);
        } else if (textinProgress.charAt(b).search(letters_aArray[4].toUpperCase()) == 0) {
            outputText.appendText(letters_bArray[4].toUpperCase());
        } else if (textinProgress.charAt(b).search(letters_aArray[5]) == 0) {
            outputText.appendText(letters_bArray[5]);
        } else if (textinProgress.charAt(b).search(letters_aArray[5].toUpperCase()) == 0) {
            outputText.appendText(letters_bArray[5].toUpperCase());
        } else if (textinProgress.charAt(b).search(letters_aArray[6]) == 0) {
            outputText.appendText(letters_bArray[6]);
        } else if (textinProgress.charAt(b).search(letters_aArray[6].toUpperCase()) == 0) {
            outputText.appendText(letters_bArray[6].toUpperCase());
        } else if (textinProgress.charAt(b).search(letters_aArray[7]) == 0) {
            outputText.appendText(letters_bArray[7]);
        } else if (textinProgress.charAt(b).search(letters_aArray[7].toUpperCase()) == 0) {
            outputText.appendText(letters_bArray[7].toUpperCase());
        } else if (textinProgress.charAt(b).search(letters_aArray[8]) == 0) {
            outputText.appendText(letters_bArray[8]);
        } else if (textinProgress.charAt(b).search(letters_aArray[8].toUpperCase()) == 0) {
            outputText.appendText(letters_bArray[8].toUpperCase());
        } else if (textinProgress.charAt(b).search(letters_aArray[9]) == 0) {
            outputText.appendText(letters_bArray[9]);
        } else if (textinProgress.charAt(b).search(letters_aArray[9].toUpperCase()) == 0) {
            outputText.appendText(letters_bArray[9].toUpperCase());
        } else if (textinProgress.charAt(b).search(letters_aArray[10]) == 0) {
            outputText.appendText(letters_bArray[10]);
        } else if (textinProgress.charAt(b).search(letters_aArray[10].toUpperCase()) == 0) {
            outputText.appendText(letters_bArray[10].toUpperCase());
        } else if (textinProgress.charAt(b).search(letters_aArray[11]) == 0) {
            outputText.appendText(letters_bArray[11]);
        } else if (textinProgress.charAt(b).search(letters_aArray[11].toUpperCase()) == 0) {
            outputText.appendText(letters_bArray[11].toUpperCase());
        } else if (textinProgress.charAt(b).search(letters_aArray[12]) == 0) {
            outputText.appendText(letters_bArray[12]);
        } else if (textinProgress.charAt(b).search(letters_aArray[12].toUpperCase()) == 0) {
            outputText.appendText(letters_bArray[12].toUpperCase());
        } else if (textinProgress.charAt(b).search(letters_aArray[13]) == 0) {
            outputText.appendText(letters_bArray[13]);
        } else if (textinProgress.charAt(b).search(letters_aArray[13].toUpperCase()) == 0) {
            outputText.appendText(letters_bArray[13].toUpperCase());
        } else if (textinProgress.charAt(b).search(letters_aArray[14]) == 0) {
            outputText.appendText(letters_bArray[14]);
        } else if (textinProgress.charAt(b).search(letters_aArray[14].toUpperCase()) == 0) {
            outputText.appendText(letters_bArray[14].toUpperCase());
        } else if (textinProgress.charAt(b).search(letters_aArray[15]) == 0) {
            outputText.appendText(letters_bArray[15]);
        } else if (textinProgress.charAt(b).search(letters_aArray[15].toUpperCase()) == 0) {
            outputText.appendText(letters_bArray[15].toUpperCase());
        } else if (textinProgress.charAt(b).search(letters_aArray[16]) == 0) {
            outputText.appendText(letters_bArray[16]);
        } else if (textinProgress.charAt(b).search(letters_aArray[16].toUpperCase()) == 0) {
            outputText.appendText(letters_bArray[16].toUpperCase());
        } else if (textinProgress.charAt(b).search(letters_aArray[17]) == 0) {
            outputText.appendText(letters_bArray[17]);
        } else if (textinProgress.charAt(b).search(letters_aArray[17].toUpperCase()) == 0) {
            outputText.appendText(letters_bArray[17].toUpperCase());
        } else if (textinProgress.charAt(b).search(letters_aArray[18]) == 0) {
            outputText.appendText(letters_bArray[18]);
        } else if (textinProgress.charAt(b).search(letters_aArray[18].toUpperCase()) == 0) {
            outputText.appendText(letters_bArray[18].toUpperCase());
        } else if (textinProgress.charAt(b).search(letters_aArray[19]) == 0) {
            outputText.appendText(letters_bArray[19]);
        } else if (textinProgress.charAt(b).search(letters_aArray[19].toUpperCase()) == 0) {
            outputText.appendText(letters_bArray[19].toUpperCase());
        } else if (textinProgress.charAt(b).search(letters_aArray[20]) == 0) {
            outputText.appendText(letters_bArray[20]);
        } else if (textinProgress.charAt(b).search(letters_aArray[20].toUpperCase()) == 0) {
            outputText.appendText(letters_bArray[20].toUpperCase());
        } else if (textinProgress.charAt(b).search(letters_aArray[21]) == 0) {
            outputText.appendText(letters_bArray[21]);
        } else if (textinProgress.charAt(b).search(letters_aArray[21].toUpperCase()) == 0) {
            outputText.appendText(letters_bArray[21].toUpperCase());
        } else if (textinProgress.charAt(b).search(letters_aArray[22]) == 0) {
            outputText.appendText(letters_bArray[22]);
        } else if (textinProgress.charAt(b).search(letters_aArray[22].toUpperCase()) == 0) {
            outputText.appendText(letters_bArray[22].toUpperCase());
        } else if (textinProgress.charAt(b).search(letters_aArray[23]) == 0) {
            outputText.appendText(letters_bArray[23]);
        } else if (textinProgress.charAt(b).search(letters_aArray[23].toUpperCase()) == 0) {
            outputText.appendText(letters_bArray[23].toUpperCase());
        } else if (textinProgress.charAt(b).search(letters_aArray[24]) == 0) {
            outputText.appendText(letters_bArray[24]);
        } else if (textinProgress.charAt(b).search(letters_aArray[24].toUpperCase()) == 0) {
            outputText.appendText(letters_bArray[24].toUpperCase());
        } else if (textinProgress.charAt(b).search(letters_aArray[25]) == 0) {
            outputText.appendText(letters_bArray[25]);
        } else if (textinProgress.charAt(b).search(letters_aArray[25].toUpperCase()) == 0) {
            outputText.appendText(letters_bArray[25].toUpperCase());
        } else if (textinProgress.charAt(b) == "\r") {
            outputText.appendText("\n");
        } else {
            outputText.appendText(textinProgress.charAt(b));
        }
    }
}
// DECODE BUTTON
decode_btn.addEventListener(MouseEvent.CLICK, decode_btnclick);

function decode_btnclick(event:MouseEvent):void
{
    textinProgress = inputText.text;
    outputText.text = "";
    for (var b=0; b<textinProgress.length; b++) {
        if (textinProgress.charAt(b).search(letters_bArray[0]) == 0) {
            outputText.appendText(letters_aArray[0]);
        } else if (textinProgress.charAt(b).search(letters_bArray[0].toUpperCase()) == 0) {
            outputText.appendText(letters_aArray[0].toUpperCase());
        } else if (textinProgress.charAt(b).search(letters_bArray[1]) == 0) {
            outputText.appendText(letters_aArray[1]);
        } else if (textinProgress.charAt(b).search(letters_bArray[1].toUpperCase()) == 0) {
            outputText.appendText(letters_aArray[1].toUpperCase());
        } else if (textinProgress.charAt(b).search(letters_bArray[2]) == 0) {
            outputText.appendText(letters_aArray[2]);
        } else if (textinProgress.charAt(b).search(letters_bArray[2].toUpperCase()) == 0) {
            outputText.appendText(letters_aArray[2].toUpperCase());
        } else if (textinProgress.charAt(b).search(letters_bArray[3]) == 0) {
            outputText.appendText(letters_aArray[3]);
        } else if (textinProgress.charAt(b).search(letters_bArray[3].toUpperCase()) == 0) {
            outputText.appendText(letters_aArray[3].toUpperCase());
        } else if (textinProgress.charAt(b).search(letters_bArray[4]) == 0) {
            outputText.appendText(letters_aArray[4]);
        } else if (textinProgress.charAt(b).search(letters_bArray[4].toUpperCase()) == 0) {
            outputText.appendText(letters_aArray[4].toUpperCase());
        } else if (textinProgress.charAt(b).search(letters_bArray[5]) == 0) {
            outputText.appendText(letters_aArray[5]);
        } else if (textinProgress.charAt(b).search(letters_bArray[5].toUpperCase()) == 0) {
            outputText.appendText(letters_aArray[5].toUpperCase());
        } else if (textinProgress.charAt(b).search(letters_bArray[6]) == 0) {
            outputText.appendText(letters_aArray[6]);
        } else if (textinProgress.charAt(b).search(letters_bArray[6].toUpperCase()) == 0) {
            outputText.appendText(letters_aArray[6].toUpperCase());
        } else if (textinProgress.charAt(b).search(letters_bArray[7]) == 0) {
            outputText.appendText(letters_aArray[7]);
        } else if (textinProgress.charAt(b).search(letters_bArray[7].toUpperCase()) == 0) {
            outputText.appendText(letters_aArray[7].toUpperCase());
        } else if (textinProgress.charAt(b).search(letters_bArray[8]) == 0) {
            outputText.appendText(letters_aArray[8]);
        } else if (textinProgress.charAt(b).search(letters_bArray[8].toUpperCase()) == 0) {
            outputText.appendText(letters_aArray[8].toUpperCase());
        } else if (textinProgress.charAt(b).search(letters_bArray[9]) == 0) {
            outputText.appendText(letters_aArray[9]);
        } else if (textinProgress.charAt(b).search(letters_bArray[9].toUpperCase()) == 0) {
            outputText.appendText(letters_aArray[9].toUpperCase());
        } else if (textinProgress.charAt(b).search(letters_bArray[10]) == 0) {
            outputText.appendText(letters_aArray[10]);
        } else if (textinProgress.charAt(b).search(letters_bArray[10].toUpperCase()) == 0) {
            outputText.appendText(letters_aArray[10].toUpperCase());
        } else if (textinProgress.charAt(b).search(letters_bArray[11]) == 0) {
            outputText.appendText(letters_aArray[11]);
        } else if (textinProgress.charAt(b).search(letters_bArray[11].toUpperCase()) == 0) {
            outputText.appendText(letters_aArray[11].toUpperCase());
        } else if (textinProgress.charAt(b).search(letters_bArray[12]) == 0) {
            outputText.appendText(letters_aArray[12]);
        } else if (textinProgress.charAt(b).search(letters_bArray[12].toUpperCase()) == 0) {
            outputText.appendText(letters_aArray[12].toUpperCase());
        } else if (textinProgress.charAt(b).search(letters_bArray[13]) == 0) {
            outputText.appendText(letters_aArray[13]);
        } else if (textinProgress.charAt(b).search(letters_bArray[13].toUpperCase()) == 0) {
            outputText.appendText(letters_aArray[13].toUpperCase());
        } else if (textinProgress.charAt(b).search(letters_bArray[14]) == 0) {
            outputText.appendText(letters_aArray[14]);
        } else if (textinProgress.charAt(b).search(letters_bArray[14].toUpperCase()) == 0) {
            outputText.appendText(letters_aArray[14].toUpperCase());
        } else if (textinProgress.charAt(b).search(letters_bArray[15]) == 0) {
            outputText.appendText(letters_aArray[15]);
        } else if (textinProgress.charAt(b).search(letters_bArray[15].toUpperCase()) == 0) {
            outputText.appendText(letters_aArray[15].toUpperCase());
        } else if (textinProgress.charAt(b).search(letters_bArray[16]) == 0) {
            outputText.appendText(letters_aArray[16]);
        } else if (textinProgress.charAt(b).search(letters_bArray[16].toUpperCase()) == 0) {
            outputText.appendText(letters_aArray[16].toUpperCase());
        } else if (textinProgress.charAt(b).search(letters_bArray[17]) == 0) {
            outputText.appendText(letters_aArray[17]);
        } else if (textinProgress.charAt(b).search(letters_bArray[17].toUpperCase()) == 0) {
            outputText.appendText(letters_aArray[17].toUpperCase());
        } else if (textinProgress.charAt(b).search(letters_bArray[18]) == 0) {
            outputText.appendText(letters_aArray[18]);
        } else if (textinProgress.charAt(b).search(letters_bArray[18].toUpperCase()) == 0) {
            outputText.appendText(letters_aArray[18].toUpperCase());
        } else if (textinProgress.charAt(b).search(letters_bArray[19]) == 0) {
            outputText.appendText(letters_aArray[19]);
        } else if (textinProgress.charAt(b).search(letters_bArray[19].toUpperCase()) == 0) {
            outputText.appendText(letters_aArray[19].toUpperCase());
        } else if (textinProgress.charAt(b).search(letters_bArray[20]) == 0) {
            outputText.appendText(letters_aArray[20]);
        } else if (textinProgress.charAt(b).search(letters_bArray[20].toUpperCase()) == 0) {
            outputText.appendText(letters_aArray[20].toUpperCase());
        } else if (textinProgress.charAt(b).search(letters_bArray[21]) == 0) {
            outputText.appendText(letters_aArray[21]);
        } else if (textinProgress.charAt(b).search(letters_bArray[21].toUpperCase()) == 0) {
            outputText.appendText(letters_aArray[21].toUpperCase());
        } else if (textinProgress.charAt(b).search(letters_bArray[22]) == 0) {
            outputText.appendText(letters_aArray[22]);
        } else if (textinProgress.charAt(b).search(letters_bArray[22].toUpperCase()) == 0) {
            outputText.appendText(letters_aArray[22].toUpperCase());
        } else if (textinProgress.charAt(b).search(letters_bArray[23]) == 0) {
            outputText.appendText(letters_aArray[23]);
        } else if (textinProgress.charAt(b).search(letters_bArray[23].toUpperCase()) == 0) {
            outputText.appendText(letters_aArray[23].toUpperCase());
        } else if (textinProgress.charAt(b).search(letters_bArray[24]) == 0) {
            outputText.appendText(letters_aArray[24]);
        } else if (textinProgress.charAt(b).search(letters_bArray[24].toUpperCase()) == 0) {
            outputText.appendText(letters_aArray[24].toUpperCase());
        } else if (textinProgress.charAt(b).search(letters_bArray[25]) == 0) {
            outputText.appendText(letters_aArray[25]);
        } else if (textinProgress.charAt(b).search(letters_bArray[25].toUpperCase()) == 0) {
            outputText.appendText(letters_aArray[25].toUpperCase());
        } else if (textinProgress.charAt(b) == "\r") {
            outputText.appendText("\n");
        } else {
            outputText.appendText(textinProgress.charAt(b));
        }
    }
}
// RECODE BUTTON (scrambles, takes what's in the output and applies the cipher again)
recode_btn.addEventListener(MouseEvent.CLICK, recode_btnclick);

function recode_btnclick(event:MouseEvent):void
{
    textinProgress = outputText.text;
    outputText.text = "";
    for (var b=0; b<textinProgress.length; b++) {
        if (textinProgress.charAt(b).search(letters_bArray[0]) == 0) {
            outputText.appendText(letters_aArray[0]);
        } else if (textinProgress.charAt(b).search(letters_bArray[0].toUpperCase()) == 0) {
            outputText.appendText(letters_aArray[0].toUpperCase());
        } else if (textinProgress.charAt(b).search(letters_bArray[1]) == 0) {
            outputText.appendText(letters_aArray[1]);
        } else if (textinProgress.charAt(b).search(letters_bArray[1].toUpperCase()) == 0) {
            outputText.appendText(letters_aArray[1].toUpperCase());
        } else if (textinProgress.charAt(b).search(letters_bArray[2]) == 0) {
            outputText.appendText(letters_aArray[2]);
        } else if (textinProgress.charAt(b).search(letters_bArray[2].toUpperCase()) == 0) {
            outputText.appendText(letters_aArray[2].toUpperCase());
        } else if (textinProgress.charAt(b).search(letters_bArray[3]) == 0) {
            outputText.appendText(letters_aArray[3]);
        } else if (textinProgress.charAt(b).search(letters_bArray[3].toUpperCase()) == 0) {
            outputText.appendText(letters_aArray[3].toUpperCase());
        } else if (textinProgress.charAt(b).search(letters_bArray[4]) == 0) {
            outputText.appendText(letters_aArray[4]);
        } else if (textinProgress.charAt(b).search(letters_bArray[4].toUpperCase()) == 0) {
            outputText.appendText(letters_aArray[4].toUpperCase());
        } else if (textinProgress.charAt(b).search(letters_bArray[5]) == 0) {
            outputText.appendText(letters_aArray[5]);
        } else if (textinProgress.charAt(b).search(letters_bArray[5].toUpperCase()) == 0) {
            outputText.appendText(letters_aArray[5].toUpperCase());
        } else if (textinProgress.charAt(b).search(letters_bArray[6]) == 0) {
            outputText.appendText(letters_aArray[6]);
        } else if (textinProgress.charAt(b).search(letters_bArray[6].toUpperCase()) == 0) {
            outputText.appendText(letters_aArray[6].toUpperCase());
        } else if (textinProgress.charAt(b).search(letters_bArray[7]) == 0) {
            outputText.appendText(letters_aArray[7]);
        } else if (textinProgress.charAt(b).search(letters_bArray[7].toUpperCase()) == 0) {
            outputText.appendText(letters_aArray[7].toUpperCase());
        } else if (textinProgress.charAt(b).search(letters_bArray[8]) == 0) {
            outputText.appendText(letters_aArray[8]);
        } else if (textinProgress.charAt(b).search(letters_bArray[8].toUpperCase()) == 0) {
            outputText.appendText(letters_aArray[8].toUpperCase());
        } else if (textinProgress.charAt(b).search(letters_bArray[9]) == 0) {
            outputText.appendText(letters_aArray[9]);
        } else if (textinProgress.charAt(b).search(letters_bArray[9].toUpperCase()) == 0) {
            outputText.appendText(letters_aArray[9].toUpperCase());
        } else if (textinProgress.charAt(b).search(letters_bArray[10]) == 0) {
            outputText.appendText(letters_aArray[10]);
        } else if (textinProgress.charAt(b).search(letters_bArray[10].toUpperCase()) == 0) {
            outputText.appendText(letters_aArray[10].toUpperCase());
        } else if (textinProgress.charAt(b).search(letters_bArray[11]) == 0) {
            outputText.appendText(letters_aArray[11]);
        } else if (textinProgress.charAt(b).search(letters_bArray[11].toUpperCase()) == 0) {
            outputText.appendText(letters_aArray[11].toUpperCase());
        } else if (textinProgress.charAt(b).search(letters_bArray[12]) == 0) {
            outputText.appendText(letters_aArray[12]);
        } else if (textinProgress.charAt(b).search(letters_bArray[12].toUpperCase()) == 0) {
            outputText.appendText(letters_aArray[12].toUpperCase());
        } else if (textinProgress.charAt(b).search(letters_bArray[13]) == 0) {
            outputText.appendText(letters_aArray[13]);
        } else if (textinProgress.charAt(b).search(letters_bArray[13].toUpperCase()) == 0) {
            outputText.appendText(letters_aArray[13].toUpperCase());
        } else if (textinProgress.charAt(b).search(letters_bArray[14]) == 0) {
            outputText.appendText(letters_aArray[14]);
        } else if (textinProgress.charAt(b).search(letters_bArray[14].toUpperCase()) == 0) {
            outputText.appendText(letters_aArray[14].toUpperCase());
        } else if (textinProgress.charAt(b).search(letters_bArray[15]) == 0) {
            outputText.appendText(letters_aArray[15]);
        } else if (textinProgress.charAt(b).search(letters_bArray[15].toUpperCase()) == 0) {
            outputText.appendText(letters_aArray[15].toUpperCase());
        } else if (textinProgress.charAt(b).search(letters_bArray[16]) == 0) {
            outputText.appendText(letters_aArray[16]);
        } else if (textinProgress.charAt(b).search(letters_bArray[16].toUpperCase()) == 0) {
            outputText.appendText(letters_aArray[16].toUpperCase());
        } else if (textinProgress.charAt(b).search(letters_bArray[17]) == 0) {
            outputText.appendText(letters_aArray[17]);
        } else if (textinProgress.charAt(b).search(letters_bArray[17].toUpperCase()) == 0) {
            outputText.appendText(letters_aArray[17].toUpperCase());
        } else if (textinProgress.charAt(b).search(letters_bArray[18]) == 0) {
            outputText.appendText(letters_aArray[18]);
        } else if (textinProgress.charAt(b).search(letters_bArray[18].toUpperCase()) == 0) {
            outputText.appendText(letters_aArray[18].toUpperCase());
        } else if (textinProgress.charAt(b).search(letters_bArray[19]) == 0) {
            outputText.appendText(letters_aArray[19]);
        } else if (textinProgress.charAt(b).search(letters_bArray[19].toUpperCase()) == 0) {
            outputText.appendText(letters_aArray[19].toUpperCase());
        } else if (textinProgress.charAt(b).search(letters_bArray[20]) == 0) {
            outputText.appendText(letters_aArray[20]);
        } else if (textinProgress.charAt(b).search(letters_bArray[20].toUpperCase()) == 0) {
            outputText.appendText(letters_aArray[20].toUpperCase());
        } else if (textinProgress.charAt(b).search(letters_bArray[21]) == 0) {
            outputText.appendText(letters_aArray[21]);
        } else if (textinProgress.charAt(b).search(letters_bArray[21].toUpperCase()) == 0) {
            outputText.appendText(letters_aArray[21].toUpperCase());
        } else if (textinProgress.charAt(b).search(letters_bArray[22]) == 0) {
            outputText.appendText(letters_aArray[22]);
        } else if (textinProgress.charAt(b).search(letters_bArray[22].toUpperCase()) == 0) {
            outputText.appendText(letters_aArray[22].toUpperCase());
        } else if (textinProgress.charAt(b).search(letters_bArray[23]) == 0) {
            outputText.appendText(letters_aArray[23]);
        } else if (textinProgress.charAt(b).search(letters_bArray[23].toUpperCase()) == 0) {
            outputText.appendText(letters_aArray[23].toUpperCase());
        } else if (textinProgress.charAt(b).search(letters_bArray[24]) == 0) {
            outputText.appendText(letters_aArray[24]);
        } else if (textinProgress.charAt(b).search(letters_bArray[24].toUpperCase()) == 0) {
            outputText.appendText(letters_aArray[24].toUpperCase());
        } else if (textinProgress.charAt(b).search(letters_bArray[25]) == 0) {
            outputText.appendText(letters_aArray[25]);
        } else if (textinProgress.charAt(b).search(letters_bArray[25].toUpperCase()) == 0) {
            outputText.appendText(letters_aArray[25].toUpperCase());
        } else if (textinProgress.charAt(b) == "\r") {
            outputText.appendText("\n");
        } else {
            outputText.appendText(textinProgress.charAt(b));
        }
    }
}

只想告诉你为什么我做了我所做的所有令人难以置信的任意和疯狂的事情......

如果您执行其他人在这里讨论过的任何其他正常替换操作（至少从我的发现来看），您最终会在某个时刻替换您自己的工作。例如，如果您希望 B 成为 A，但又希望 A 成为 C，那么如果您键入 "BA"，您将返回 "CC" 而不是 "AC"。因此，我的代码实际上会提取每个字符并一次将它们全部吐出。
我做了所有繁琐的“.toUpperCase()”工作来确保这个工具区分大小写——这样如果我输入小写或大写的键，它总是会在它的地方。这就是为什么 RegExp 对我不太有用。
它还会考虑字母表中未包含的换行符和随机符号等内容。

我确实知道有更简单、更节能的方法来对此进行编码，但我不知道该怎么做。

Answer 1

您应该搜索 Substitution ciphers, e.g., one of the simplest ones is the Caesar cipher。

Answer 2

我将扩展我的评论并向您展示如何简化您的代码并削减大量代码。

首先，您不需要使用数组。 String 对象本质上已经是字节值数组。所以你可以这样做而不是创建大数组

var alphabet:String = "abcdefghijklmnopqrstuvwxyz";
var substitution:String = "mnbvcxzlkjhgfdsapoiuytrewq";

为了访问特定的字符，您可以简单地调用字符串上的 indexOf 方法。

var indexOfJ = alphabet.indexOf("j");
trace(indexOfJ); //puts out 9

现在您已经了解了如何从特定索引获取字符串的字符。

var charAtIndex7:String = alphabet.charAt(7);
trace(charAtIndex7); //puts out "h"

在此处编辑：

看来我昨晚写那个答案的时候才半醒。双 for 循环的问题很简单，它总是运行整个过程，即使它找到了一个被接受的 if 子句。你已经想通了你自己的最后一个 else 子句导致输入字符被打印 25 次。所以，让我们修复它。

function cipher(input:Textfield, output:Textfield, alphabet:String, substitution:String){
    textinProgress = input.text;
    var result:String = "";

    for(var b=0;b<textinProgress.length;b++)
    {
        var anyHit = false;
        for(var i=0;i<alphabet.length;i++){
            if(textinProgress.charAt(b).search(alphabet.charAt(i)) == 0){
                result += substituton.charAt(i);
                anyHit = true;
                break;
            }
            else if(textinProgress.charAt(b).search(alphabet.charAt(i).toUpperCase()) == 0){
                result += substituton.charAt(i).toUpperCase();
                anyHit = true;
                break;
            }
            else if(textinProgress.charAt(b) == "\r"){
                result += "\n";
                anyHit = true;
                break;
            }
        }
        if(anyHit == false){
            result += textinProgress.charAt(b);
        }
    }
    output.text = result;
}

今天早些时候，我让一位同事为我测试了这段代码，它应该可以正常工作。

但这并不是我们为简化您的代码所能做的全部。我们可以通过用小写和大写字母定义我们的字母表和替换变量来删除第二个 if 子句。

var alphabet:String = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ";
var substitution:String = "mnbvcxzlkjhgfdsapoiuytrewqMNBVCXZLKJHGFDSAPOIUYTREWQ";

您还应该能够将特殊符号放入您的字母表和替换字符串中，例如 \r。

var alphabet:String = "\rabcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ";
var substitution:String = "\nmnbvcxzlkjhgfdsapoiuytrewqMNBVCXZLKJHGFDSAPOIUYTREWQ";

我不确定这是否有效，但应该可以。

现在您已经大大缩短了代码，但我们甚至可以进一步缩短它。内部for循环真的有必要吗？因为我们的字母和我们的替换长度相同，也许我们可以进一步简化它。

function cipher(input:Textfield, output:Textfield, alphabet:String, substitution:String){
    textinProgress = input.text;
    var result:String = "";

    for(var b=0;b<textinProgress.length;b++)
    {
        var index:int = alphabet.indexOf(textinProgress.charAt(b));
        if(index >= 0){
            result += substitution.charAt(index);
        }else{
            result += textinProgress.charAt(b);
        }
    }
    output.text = result;
}

把它们放在一起。

var alphabet:String = "\rabcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ";
var substitution:String = "\nmnbvcxzlkjhgfdsapoiuytrewqMNBVCXZLKJHGFDSAPOIUYTREWQ";

function cipher(input:Textfield, output:Textfield, alphabet:String, substitution:String){
    textinProgress = input.text;
    var result:String = "";

    for(var b=0;b<textinProgress.length;b++)
    {
        var index:int = alphabet.indexOf(textinProgress.charAt(b));
        if(index >= 0){
            result += substitution.charAt(index);
        }else{
            result += textinProgress.charAt(b);
        }
    }
    output.text = result;
}

function encode_btnclick(event:MouseEvent):void{
   cipher(inputText, outputText, alphabet, substitution);
}

function decode_btnclick(event:MouseEvent):void{
   cipher(inputText, outputText, substitution, alphabet);
}

function recode_btnclick(event:MouseEvent):void{
   cipher(outputText, outputText, alphabet, substitution);
}

这个应该可以处理

任意长度的文本
换行符
大小写字母
未定义的字符

AS3 密码解码器和编码器（更好的答案？）

AS3 Cipher Decoder & Encoder (better answer?)

encryption

flash

encoder

decoder

actionscript-3