Ruby on Rails Titleize Underscore,Hyphenated and Single Quote Name

Rails titleize method removes hyphen and underscore, and capitalize method does not capitalize the word comes after hyphen and underscore. I wanted to do something like following:

sam-joe denis-moore      → Sam-Joe Denis-Moore
sam-louise o'donnell     → Sam-Louise O'Donnell
arthur_campbell john-foo → Arthur_Campbell John-Foo"

What is pattern that need to use on gsub below for this:

"sam-joe denis-moore".humanize.gsub(??) { $1.capitalize }
# => "Sam-Joe Denis-Moore"

Any help is really appreciated

Try this:

my_string.split(/([ _-])/).map(&:capitalize).join

You can put whatever delimiters you like in the regex. I used , _, and -. So, for example:

'sam-joe denis-moore'.split(/([ _-])/).map(&:capitalize).join

Results in:

'Sam-Joe Denis-Moore'

What it does is:

1. .split(/([ _-])/) splits the string into an array of substrings at the given delimiters, and keeps the delimiters as substrings
2. .map(&:capitalize) maps the resulting array of strings to a new array of strings, capitalizing each string in the array (delimiters, when capitalized, are unaffected)
3. .join joins the resulting array of substrings back together for the final result

You could, if you want, monkey patch the String class with your own titleize:

class String
  def my_titleize
    self.split(/([ _-])/).map(&:capitalize).join
  end
end

Then you can do:

'sam-joe denis-moore'.my_titleize
=> 'Sam-Joe Denis-Moore'