Missing letters Help Needed

JavaScript
1

Tell us what’s happening:
I think the logic is good but I got undefined for charCodeAt and I don’t know why…

Your code so far


function fearNotLetter(str) {
let word = str.split("");
word.map(function (letter, index) {
  if (index + 1 <= word.length && letter.charCodeAt(0) + 1 !== letter[index + 1].charCodeAt(0)) {
    let conver = letter.charCodeAt(0) + 1;
    return String.fromCharCode(conver);
  } else {
    return undefined;
  }
});
}

fearNotLetter("abce");

Your browser information:

User Agent is: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/69.0.3497.100 Safari/537.36.

Link to the challenge:
https://learn.freecodecamp.org/javascript-algorithms-and-data-structures/intermediate-algorithm-scripting/missing-letters

3

ups that was a typo I meant word instead of letter something like …


function fearNotLetter(str) {
let word = str.split("");
word.map(function (letter, index) {
  if (index + 1 <= word.length && letter.charCodeAt(0) + 1 !== world[index + 1].charCodeAt(0)) {
    let conver = letter.charCodeAt(0) + 1;
    return String.fromCharCode(conver);
  } else {
    return undefined;
  }
});
}

fearNotLetter("abce");

I’m still getting the same issue… “Cannot read property ‘charCodeAt’ of undefined”

5

Yeah sorry, well actually in my code is word no world.

What else could be?

myFunction

6

Still trying to figure out what I am doing wrong…