用数组中的字符替换字符串中的字符

Question

I'm trying to make a script that changes text into these cool looking letters, it looks like everything should be working but when I try to send the replaced message it gives me a character like a white question mark on a black background. This:

Here's the code:

  var mm = "test";
  var alphabet = "🇦🇧🇨🇩🇪🇫🇬🇭🇮🇯🇰🇱🇲🇳🇴🇵🇶🇷🇸🇹🇺🇻🇼🇽🇾🇿";
  var nalphabet = "abcdefghijklmnopqrstuvwxyz";    
  for(var z in mm){
    var x = nalphabet.indexOf(mm[z].toLowerCase());
    var ool = alphabet[x];
    msg.channel.sendMessage(ool);
  }

Answer 1

This is all about the coding of characters. Each of your cool-looking letters has length 2. So when you try to get such character directly by index, you receive just a half of it. As a solution you can try to join two sibling characters. Something like this

  var mm = "test";
  var alphabet = "🇦🇧🇨🇩🇪🇫🇬🇭🇮🇯🇰🇱🇲🇳🇴🇵🇶🇷🇸🇹🇺🇻🇼🇽🇾🇿";
  var nalphabet = "abcdefghijklmnopqrstuvwxyz";    
  for(var z in mm){
    var x = nalphabet.indexOf(mm[z].toLowerCase());
    var ool = alphabet[x * 2] + alphabet[x * 2 + 1];
    msg.channel.sendMessage(ool);
  }

Answer 2

Try this one:

var message = "test";
var alphabet = ["🇦","🇧","🇨","🇩","🇪",
                "🇫","🇬","🇭","🇮","🇯",
                "🇰","🇱","🇲","🇳","🇴",
                "🇵","🇶","🇷","🇸","🇹",
                "🇺","🇻","🇼","🇽","🇾","🇿"];
var nalphabet = "abcdefghijklmnopqrstuvwxyz";    
for(var letter in message) {
    var x = nalphabet.indexOf(message[letter].toLowerCase());
    var ool = alphabet[x];
    document.write(ool);
}

Here is a Fiddle .