Title-case a heading
The CMS title-cases headings on save, but the house style leaves the small joining words in lowercase unless one of them opens the heading.
- Capitalise the first letter of every word and lowercase the rest of it.
- These stay lowercase: a, an, and, as, at, but, by, for, in, of, on, or, the, to.
- Except the very first word, which is always capitalised.
- Words are separated by single spaces.
TitleCase(heading: 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 TitleCase(string heading) {
}Worked examples
| Call | Result |
|---|---|
TitleCase("the lord of the rings") | "The Lord of the Rings" |
TitleCase("a tale OF two cities") | "A Tale of Two Cities" |
TitleCase("hello") | "Hello" |
TitleCase("of mice and men") | "Of Mice and Men" |
Hint
Handle index 0 as its own case, then let the small-word list decide for the rest.
Reference solution in C#
public string TitleCase(string heading) {
var small = new HashSet<string> { "a", "an", "and", "as", "at", "but", "by", "for", "in", "of", "on", "or", "the", "to" };
if (heading.Length == 0) return "";
var parts = heading.Split(' ');
for (int i = 0; i < parts.Length; i++) {
string low = parts[i].ToLowerInvariant();
if (i > 0 && small.Contains(low)) parts[i] = low;
else if (low.Length == 0) parts[i] = low;
else parts[i] = char.ToUpperInvariant(low[0]) + low.Substring(1);
}
return string.Join(" ", parts);
}