From: "Kroeger, Simon (ext)" <simon.kroeger.ext@...>
Date: 2006-05-22T23:56:14+09:00
Subject: Re: rubynuby - confused by method name "inject"

 
> ..though the other uses of inject defy "inject_operator"...
> 
> data = [[1, 7, 3], [1, 2], [1, 5, 4, 1], [1, 8]]
> 
> longest_sample = nil
> longest_length = data.inject(0) do |accum, sample|
> 	if accum > sample.length
> 		accum
> 	else
> 		longest_sample = sample
> 		sample.length
> 	end
> end
> 
> puts "Longest sample: #{longest_sample.inspect}, length 
> #{longest_length}"
> 
> ..then again, using inject to find longest seems a bit silly...

Well, Enumerable#max is the way to go here, but inject isn't 
that clumsy too:

longest = data.inject{|max, this| this.length > max.length ? this : max}
puts "Longest sample: #{longest.inspect}, length #{longest.length}"

I love it, it's the swiss army knife of Enumerable.

cheers

Simon