From: Robert Klemme <shortcutter@...>
Date: 2007-04-30T19:00:05+09:00
Subject: Re: Array.which_long? ( I coded an extension for Array )

On 29.04.2007 16:11, Chris Carter wrote:
> On 4/29/07, Billy Hsu <ruby.maillist@gmail.com> wrote:
>> Hi, I'm CFC
>> I'm new at here.
>> Nice to meet you:)
>>
>  > I just coded an extension for Array.
>> It will return the longest element of an array.
>> Source:
>>
>> class Array
>>   def which_long?
>>     # Version 1.0
>>     # Coded by CFC < zusocfc @ gmail . com >
>>     # PLEASE DO NOT REMOVE THE COMMENT OF THIS FUNCTION, THANKS A LOT.
>>     # Usage:
>>     #   ['a', 'ab', 'abc' 1234].which_long?
>>     #   => 1234
>>     max, long, self_cpy = 0, "", []
>>     self.size.times{|i| self_cpy << self[i].to_s}
>>     self_cpy.each{|item| (max = item.size; long = item) if item.size > 
>> max }
>>     long
>>   end
>> end
>>
>> Usage:
>>   puts [1, 23, '456'].which_long?
>>   => 456
>>
>> CFC --
>>
> How about:
> class Array
>  def longest
>    self.map {|x| x.to_s }.sort_by {|x| x.size}[-1]
>  end
> end

Thank you for leaving the #inject solutions to me. :-)

irb(main):001:0> %w{a ab abc 123 34}.inject{|a,b| a.size > b.size ? a : b}
=> "123"
irb(main):002:0> %w{a ab abc 123 34}.inject{|a,b| a.size >= b.size ? a : b}
=> "abc"

Kind regards

	robert