Initials for an avatar
The user menu shows initials when someone has no profile picture.
- Take the first letter of each space-separated word, uppercased, joined by dots, with a trailing dot.
- Collapse repeated spaces, and ignore leading and trailing ones.
- An empty or blank name gives an empty string.
Initials(fullName: string) → string
C# needs a compiler and Drill does not host one yet, so this page is the reference rather than an exercise: the problem, worked examples, and the solution in full. To type it out, the same problem runs in Python.
Where you start
public string Initials(string fullName) {
}Worked examples
| Call | Result |
|---|---|
Initials("ada lovelace") | "A.L." |
Initials("Grace Brewster Hopper") | "G.B.H." |
Initials(" linus ") | "L." |
Initials("") | "" |
Hint
Split on whitespace, drop the empty pieces, then take index 0 of each.
Reference solution in C#
public string Initials(string fullName) {
var sb = new StringBuilder();
foreach (var w in fullName.Split((char[]) null, StringSplitOptions.RemoveEmptyEntries)) {
sb.Append(char.ToUpperInvariant(w[0])).Append('.');
}
return sb.ToString();
}