字符串-元音为大写字母，字母为下一个字母-Javascript

Question

我正在尝试将字符串的所有字母转换为字母的下一个字母，例如A应该变成B ， X应该变成Y ， Z应该变成A等。

字母移动完成后，我想将每个元音都大写。

function LetterChanges(str) {

   var c = str.split("");
    var vowels = ["a", "e", "i", "o", "u"]; 
   if (c == vowels) {
      vowels.toUpperCase();}
   if (c == "z") return "a";  
    return str.replace(/[a-z]/gi, function(s) {
      return String.fromCharCode(s.charCodeAt(c)+1);
      });

}
LetterChanges("cold buttz"); 

元音部分和z到a部分是行不通的。 请帮忙？

Answer 1

看看是否有帮助：

var str = 'cold buttz';

str = str.replace(/[a-z]/gi, function(char) {
  char = String.fromCharCode(char.charCodeAt(0)+1);
  if (char=='{' || char=='[') char = 'a';
  if (/[aeiuo]/.test(char)) char = char.toUpperCase();
  return char;
});

console.log(str); //= "dpmE cvUUA"

编辑：我可以看到您的代码有点像是我上次回答中的混乱复制/粘贴...这是它有什么问题的简短描述：

function LetterChanges(str) {

  var c = str.split(""); // array of letters from `str`
  var vowels = ["a", "e", "i", "o", "u"]; // array of vowels

  // `c` and `vowels` are two different objects
  // so this test will always be false
  if (c == vowels) {
    // `toUpperCase` is a method on strings, not arrays
    vowels.toUpperCase();
  }

  // You're comparing apples to oranges,
  // or an array to a string, this test will also be false
  // Then you return 'a'?? This was meant to be inside the `replace`
  if (c == "z") return "a";

  // OK, I see you recycled this from my other answer
  // but you copy/pasted wrong... Here you're basically saying:
  // "For each letter in the string do something and return something new"
  return str.replace(/[a-z]/gi, function(s) { // `s` is the letter
    // Here we find out the next letter but
    // `c` is an array and `charCodeAt` expects an index (number)
    return String.fromCharCode(s.charCodeAt(c)+1);

    // `.charCodeAt(0)` gives you the code for the first letter in a string
    // in this case there's only one.
  });
}

Answer 2

我的解决方案完全可以满足您的要求。 字母首先在字母表中移位，然后元音被大写。

看一看：

 function LetterChanges(str) { var alphabet = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"; var ret = new Array(); for (var x=0; x < str.length; x++) { for(var i=0; i < alphabet.length; i++) { if (checkIfCharInString(alphabet, str[x]) == false) { ret[x] = str[x].toString(); break; } if (str[x] == alphabet[i]) { if (alphabet[i] == "Z") { ret[x] = "A"; } else { ret[x] = alphabet[i+1]; } } } } var output = ret.join(""); output = capitalizeVowels(output); // code goes here return output; } function checkIfCharInString(motherString, char) { for(var i=0; i < motherString.length; i++) { if (motherString[i] == char.toString()) { return true; } } return false; } function capitalizeVowels(str) { var vowel = "aeiou"; var newStr = new Array(); for(var i=0; i < str.length; i++) { for(var x=0; x < vowel.length; x++) { newStr[i] = str[i]; if (str[i] == vowel[x]) { newStr[i] = vowel[x].toUpperCase(); break; } } } return newStr.join(""); } console.log(LetterChanges("Hello*3")); console.log(LetterChanges("I love stackoverflow!")); console.log(LetterChanges("I have Internet explorer!!"));