ReplaceWithAlphabetPosition.js

// In this kata you are required to, given a string, replace every letter with its position in the alphabet.

// If anything in the text isn't a letter, ignore it and don't return it.

// "a" = 1, "b" = 2, etc.

// Example
// alphabetPosition("The sunset sets at twelve o' clock.")
// Should return "20 8 5 19 21 14 19 5 20 19 5 20 19 1 20 20 23 5 12 22 5 15 3 12 15 3 11" ( as a string )

function alphabetPosition(text) {

  let alphabet = ["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"]

  return text.toUpperCase().split('').filter((letter) => letter >= 'A' && letter <= 'Z').map((letter) => alphabet.indexOf(letter) + 1).join(' ')
  
  
}

//different approach

function alphabetPosition(text) {
  var result = "";
  for (var i = 0; i < text.length; i++){
    var code = text.toUpperCase().charCodeAt(i)
    if (code > 64 && code < 91) result += (code - 64) + " ";
  }

  return result.slice(0, result.length-1);
}