Ubbi Dubbi how to add ub before each vowel?-CodePudding

Console.Write("Enter word: ");
string word = Console.ReadLine();
var loc = word.IndexOfAny(new char[] { 'a', 'e', 'i', 'o', 'u' });

string word1 = loc >= 0 ? word.Insert(loc, "ub") : word;
Console.WriteLine(word1);

I get hubello but I want hubellubo instead.

CodePudding user response：

You're only doing a single modification to your string - whichever vowel you detect first. IndexOfAny returns only the first match found.

Instead, you'll need to find all the vowels in your input string. You can do this with a loop, but it might be easier to do this with Regex replacments.

var input = "hello";
var pattern = "([aeiou])";
var replaced = Regex.Replace(input, pattern, "ub$1");
Console.WriteLine(replaced);

The capture group is needed to re-replace the found vowel back in the replacement.

CodePudding user response：

You need a loop to iterate each finding

string word = "hello";
char[] loc = new char[] { 'a', 'e', 'i', 'o', 'u' };
int minIndex = word.IndexOfAny(loc);
while (minIndex != -1)
{
    string insert = "ub";
    word = word.Insert(minIndex, insert);
    minIndex = word.IndexOfAny(loc, minIndex   insert.Length   1);
}
Console.WriteLine(word);

https://dotnetfiddle.net/kBPIrF

CodePudding user response：

Linq solution:

 var input = "hello";

 string replaced = string.Concat(input
   .Select(c => "aeiou".Contains(c) ? $"ub{c}" : $"{c}")); 

 Console.WriteLine(replaced);

Here we scan each character c within input and either add "ub" prefix or keep character as it was.