Question

I’m tring to remove the char ‘.’ from a string except the last occurrence; for example the string

12.34.56.78

should became

123456.78

I’m using this loop:

while (value != null && value.Count(c => c == '.') > 1)
 {
   value = value.Substring(0, value.IndexOf('.')) + value.Substring(value.IndexOf('.') + 1);
 }

I wonder if there is a cleaner way (maybe using linq?) to do this whitout an explicit loop?

(I know there is a very similar question but is about perl and things are quite different)

Answer 1

I would do that way:

1. search for the last ‘.’ ;
2. substring [0 .. indexOfLastDot] ;
3. remove in place any ‘.’ of the substring
4. concatenate the substring with the rest of the original string, [indexOfLastDot .. remaining]

OR

1. search for the last ‘.’
2. for each enumerated char of the string
3. if it’s a ‘.’ and i ≠ indexOfLastDot, remove it