From: John Feminella <johnf@...>
Date: 2011-05-15T20:49:58+09:00
Subject: Re: Counting how many times the same elements occurs in an array?

You didn't mention what a particular xml_event object looks like, but
you'll probably want something like this:

xml_events.group_by(&:name).each do |name, events|
  puts "there were #{events.size} events of type #{name}"
end

~ jf
--
John Feminella
Principal Consultant, BitsBuilder
LI: http://www.linkedin.com/in/johnxf
SO: http://stackoverflow.com/users/75170/



On Sun, May 15, 2011 at 06:01, Thomas Greenwood <nedpointsman@gmail.com> wrote:
> There's probably a fairly simple way to do this.
>
> Basically I'm reading data from an xml file, I need to figure out how
> many times identical data occurs in certain attributes, so far I've got
> the data into two identical arrays and had the intention of nesting
> iterators - seeing if the element was equal to the second and
> incrementing every time a match was found. That obviously didn't work
> out the way I initially thought.
>
> This seems to be the jist of what I want but it's obviously returning a
> count on every iteraton whereas I only want the final tally.
>
> xml_events.each{|x|
>  puts "#{x} occurs #{xml_events.count(x)} times"
> }
>
> Any ideas?
>
> --
> Posted via http://www.ruby-forum.com/.
>
>