From: Morton Goldberg <m_goldberg@...>
Date: 2006-07-26T14:31:14+09:00
Subject: Re: Learn to program (Chris Pine) array.sort

You're very close to what is needed. The following variation on your  
code will do the job.

Regards, Morton

#! /usr/bin/ruby -w

array_input = []
loop do
   input = gets.chomp
   break if input.empty?
   array_input << input
end
puts
puts array_input.sort

On Jul 26, 2006, at 12:55 AM, Geoff wrote:

> "Write the program we talked about at the very beginning of this
> chapter.
> Hint: There's a lovely array method which will give you a sorted
> version of an array: sort. Use it!"
>
>> From the beginning of the chapter:
>
> "Let's write a program which asks us to type in as many words as we
> want (one word per line, continuing until we just press Enter on an
> empty line), and which then repeats the words back to us in
> alphabetical order."
>
> Here is what I have that works, but I had to change it in order to get
> the program to exit. You see I can't seem to get the program to exit
> on just entering a blank line at the prompt, so I wrote some code so
> that it would quit with when I entered the word "bye."
>
> array_input = []
> input = ''
> while input != "bye"
>   input = gets.chomp
>   array_input << input
> end
> puts
> array_input.delete_if { |x| x == 'bye' }
> puts array_input.sort
>
> Problem is I would actually like to know how to solve the problem as
> written! So when I use "while input != "something goes here and I'm
> not sure what to use to designate a blank line." Then I can eliminate
> the second to the last line.