Remove characters before character "."
C#C# Problem Overview
How effectively remove all character in string that placed before character "."?
Input: Amerika.USA
Output: USA
C# Solutions
Solution 1 - C#
You can use the IndexOf method and the Substring method like so:
string output = input.Substring(input.IndexOf('.') + 1);
The above doesn't have error handling, so if a period doesn't exist in the input string, it will present problems.
Solution 2 - C#
You could try this:
string input = "lala.bla";
output = input.Split('.').Last();
Solution 3 - C#
string input = "America.USA"
string output = input.Substring(input.IndexOf('.') + 1);
Solution 4 - C#
String input = ....;
int index = input.IndexOf('.');
if(index >= 0)
{
return input.Substring(index + 1);
}
This will return the new word.
Solution 5 - C#
public string RemoveCharactersBeforeDot(string s)
{
string splitted=s.Split('.');
return splitted[splitted.Length-1]
}
Solution 6 - C#
A couple of methods that, if the char does not exists, return the original string.
This one cuts the string after the first occurrence of the pivot:
public static string truncateStringAfterChar(string input, char pivot){
int index = input.IndexOf(pivot);
if(index >= 0) {
return input.Substring(index + 1);
}
return input;
}
This one instead cuts the string after the last occurrence of the pivot:
public static string truncateStringAfterLastChar(string input, char pivot){
return input.Split(pivot).Last();
}
Solution 7 - C#
Extension methods I commonly use to solve this problem:
public static string RemoveAfter(this string value, string character)
{
int index = value.IndexOf(character);
if (index > 0)
{
value = value.Substring(0, index);
}
return value;
}
public static string RemoveBefore(this string value, string character)
{
int index = value.IndexOf(character);
if (index > 0)
{
value = value.Substring(index + 1);
}
return value;
}