[英]Program to make vowels in string uppercase and change letters to next letter in alphabet(i.e. a->b) not working
[英]String - Vowels to uppercase, letters to next in alphabet - Javascript
我正在嘗試將字符串的所有字母轉換為字母的下一個字母,例如A應該變成B , X應該變成Y , Z應該變成A等。
字母移動完成后,我想將每個元音都大寫。
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。 請幫忙?
看看是否有幫助:
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"
編輯:我可以看到您的代碼有點像是我上次回答中的混亂復制/粘貼...這是它有什么問題的簡短描述:
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.
});
}
我的解決方案完全可以滿足您的要求。 字母首先在字母表中移位,然后元音被大寫。
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!!"));
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