Welcome to the Treehouse Community

The Treehouse Community is a meeting place for developers, designers, and programmers of all backgrounds and skill levels to get support. Collaborate here on code errors or bugs that you need feedback on, or asking for an extra set of eyes on your latest project. Join thousands of Treehouse students and alumni in the community today. (Note: Only Treehouse students can comment or ask questions, but non-students are welcome to browse our conversations.)

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and a supportive community. Start your free trial today.

Ruby Ruby Objects and Classes Ruby Objects and Classes Asking Objects Questions

How to work with respond_to?

How do you work with it?

string = String.new("a random string")

String = respond_to?.upcase

1 Answer

Hi Victor,

Use dot notation to chain respond_to? onto the string variable (lowercase s). Then pass in the method (upcase) either as a symbol, :upcase or as a string, "upcase":

#symbol uses a preceding colon
string.respond_to? :upcase
 # or
string.respond_to?("upcase") # parentheses optional

I hope that helps,