From: Daniel Martin <martin@...>
Date: 2007-01-17T04:45:15+09:00
Subject: Re: Can anyone try to solve this problems?

David Madden <moose56@gmail.com> writes:

>>   2. Write a function to find the longest string in an array of
>> strings.
>>
> Is this from the Brian Schroder Ruby Course PDF?
>
> Here is my function (no doubt a better on exists):

Well, okay, we've heard from folks with their fancy 1.9 ruby with
max_by and that &:sym notation.  However, I'm a little bit surprised
that this one-liner with inject didn't pop up:

def longest(a)
  a.inject { |x,y| x.length < y.length ? y : x }
end

ObQuickIRBSanityCheck:

irb(main):001:0> def longest(a)
irb(main):002:1>   a.inject { |x,y| x.length < y.length ? y : x }
irb(main):003:1> end
=> nil
irb(main):004:0> longest(%w[a bc de fgh ijkl mnopq rstu vwxyz])
=> "mnopq"

foldr is your friend.

-- 
s=%q(  Daniel Martin -- martin@snowplow.org
       puts "s=%q(#{s})",s.map{|i|i}[1]       )
       puts "s=%q(#{s})",s.map{|i|i}[1]