Reason #110 • April 20th, 2026

ActiveSupport: String#titleize

This one, I think, speaks for itself:

Ruby
"quarterly_revenue_report".titleize
# => "Quarterly Revenue Report"

"x-men: the last stand".titleize
# => "X Men: The Last Stand"
JavaScript
const titleize = (value) =>
  value
    .replace(/[_-]+/g, " ")
    .replace(/\b\w/g, (char) => char.toUpperCase());

titleize("quarterly_revenue_report");
// => "Quarterly Revenue Report"

titleize("x-men: the last stand");
// => "X Men: The Last Stand"

Never did your String get redressed for public consumption so quickly and easily as with titleize 🕺

History

titleize landed in ActiveSupport 0.14.2, released in 2005.

Interestingly, the original commit message called it a "title case" method, and Rails also kept titlecase as an alias.

Reason #111 ?