Question

I’ve created a web framework that uses the following function:

def to_class(text)
    text.capitalize
    text.gsub(/(_|-)/, '')
end

To turn directory names that are snake_cased or hyphen-cased into PascalCased class names for your project.

Problem is, the function only removed _ and -, and doesn’t capitalize the next letter. Using .capitalize, or .upcase, is there a way to achieve making your snake/hyphen_/-cased names into proper PascalCased class names?

Answer 1

This splits the _-cased string into an array; capitalizes every member and glues the array back to a string:

def to_pascal_case(str)
  str.split(/-|_/).map(&:capitalize).join
end

p to_pascal_case("snake_cased") #=>"SnakeCased"

Your code does not work for several reasons:

• The resulting object of the capitalize method is discarded – you
  should do something like text.capitalize! or text = text.capitalize.
• But the capitalize method just upcases the first letter of the string,
  not the first letter of every word.