Remove the last 2 characters from a string in Ruby?

Question

I'm collecting all my user's email addresses for a mass mailing like this:

def self.all_email_addresses
  output = ''
  User.all.each{|u| output += u.email + ", " }
      output
end

However, I end up with an extra ", " on the string of email addresses.

How can I get rid of this / is there a better way to get a comma separated list of email addresses?

Answer 1

Use join:

def self.all_email_addresses
  User.all.collect {|u| u.email}.join ', '
end

Answer 2

remove the last two characters

str.chop.chop

Although this does answer the exact question perfectly, I agree that it isn't the best way to solve the actual problem.

Answer 3

Or just "yadayada"[0..-3] will do it.