JavaScript Decoder Tool

I have been experiencing issues with my encoder, as it is not functioning as I had anticipated.
The variable "message" was declared through an input added to my HTML page

var ENCODE_OPC = ['a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z', 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z', '1', '2', '3', '4', '5', '6','7','8', '9', '0', ' '];
var DECODE_OPC = ['&2p', '&4g', '&6g', '&7b', '&4v', '&8n', '&4b', '&1d', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z', 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z', '1', '2', '3', '4', '5', '6','7','8', '9', '0', ' '];
for (var q = 0; q < 63; q++) {
    message.replace(ENCODE_OPC[q], DECODE_OPC[q]);
}
console.log(message);
javascriptdecoder

Answer №1

There are a couple of issues that need addressing:

  1. message.replace() does not change the original string; instead, it generates a new string. To update the existing variable, you must assign the result like this: message = message.replace(...);
  2. If the first argument in replace() is a string, only the initial occurrence will be replaced. To replace all instances, utilize a regular expression with the global flag (g).
for (var q = 0; q < ENCODE_OPC.length; q++) {
    message = message.replace(new RegExp(ENCODE_OPC[q], 'g'), DECODE_OPC[q]);
}

Answer №2

Give this code a try

var CHAR_ENCODE = ['a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z', 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z', '1', '2', '3', '4', '5', '6','7','8', '9', '0', ' '];
var CHAR_DECODE = ['&2p', '&4g', '&6g', '&7b', '&4v', '&8n', '&4b', '&1d', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z', 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z', '1', '2', '3', '4', '5', '6','7','8', '9', '0', ' '];
var encodedMessage = '';
var messageToEncode = "Hello world";

for (var x = 0; x < messageToEncode.length; x++) {
    encodedMessage += CHAR_DECODE[CHAR_ENCODE.indexOf(messageToEncode[x])];
}
console.log(messageToEncode, encodedMessage);

Result

Hello world H&4vllo worl&7b

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