Ending Programs by pressing Enter key

ruby-talk
1

Hello everyone,

I am new to Ruby and reading 'Learn to Program: The pragmatic
programmers'

I would like to know how to make a program end by hitting the enter key
after leaving the gets parameter blank.

Kindly point me in the right direction.

Regards,

DE.

···

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Posted via http://www.ruby-forum.com/.

2

Dipo Elegbede wrote in post #1138228:

I would like to know how to make a program end by hitting the enter key
after leaving the gets parameter blank.

-------------------------SNIP ----------------------
#encoding: UTF-8
#!/usr/local/bin/ruby

exit false if gets.chomp.empty?

puts 'was\'t empty'
-------------------------SNIP ----------------------

···

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Posted via http://www.ruby-forum.com/\.

3

Ok, this is what I am trying to achieve

Write the program we talked about at the beginning of this chapter,
one that asks us to type as many words as we want (one word
per line, continuing until we just press Enter on an empty line)
and then repeats the words back to us in alphabetical order. Make
sure to test your program thoroughly; for example, does hitting
Enter on an empty line always exit your program? Even on the
first line? And the second? Hint: There’s a lovely array method
that will give you a sorted version of an array: sort. Use it!

and this is what I am doing

words = []
say = 'nil'

while say != ''
  puts 'say a word: '
  talk = gets.chomp
  exit false if gets.chomp.empty?
  words.push talk.to_s
end
puts words
puts words.sort

This is having me input two different words before putsing 'Say a word'

Kindly point me in the right direction.

Redards,

DE.

···

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Posted via http://www.ruby-forum.com/.

4

When you call exit the program will exit, and I expect you want the while loop to finish and still output the words. You can break out of a loop using break. For example

  x = 0
  loop do
    x +=1
    break if x == 10
    puts x
  end
  puts "done"

will print out the numbers 1 to 9 and then "done".

Hope this helps,

Mike

···

On Feb 27, 2014, at 8:31 AM, Dipo Elegbede <lists@ruby-forum.com> wrote:

Ok, this is what I am trying to achieve

Write the program we talked about at the beginning of this chapter,
one that asks us to type as many words as we want (one word
per line, continuing until we just press Enter on an empty line)
and then repeats the words back to us in alphabetical order. Make
sure to test your program thoroughly; for example, does hitting
Enter on an empty line always exit your program? Even on the
first line? And the second? Hint: There’s a lovely array method
that will give you a sorted version of an array: sort. Use it!

and this is what I am doing

words =
say = 'nil'

while say != ''
puts 'say a word: '
talk = gets.chomp
exit false if gets.chomp.empty?
words.push talk.to_s
end
puts words
puts words.sort

This is having me input two different words before putsing 'Say a word'

Kindly point me in the right direction.

--

Mike Stok <mike@stok.ca>
http://www.stok.ca/~mike/

The "`Stok' disclaimers" apply.

5

Dear Dipo,

Easy catch.
You are getting and chomping 2 times!!!

You are doing...
  talk = gets.chomp
  exit false if gets.chomp.empty?

When you should be doing...
  talk = gets.chomp
  exit false if talk.empty?

Keep rubying!

Best regards,
Abinoam Jr.

···

On Thu, Feb 27, 2014 at 10:31 AM, Dipo Elegbede <lists@ruby-forum.com> wrote:

Ok, this is what I am trying to achieve

Write the program we talked about at the beginning of this chapter,
one that asks us to type as many words as we want (one word
per line, continuing until we just press Enter on an empty line)
and then repeats the words back to us in alphabetical order. Make
sure to test your program thoroughly; for example, does hitting
Enter on an empty line always exit your program? Even on the
first line? And the second? Hint: There's a lovely array method
that will give you a sorted version of an array: sort. Use it!

and this is what I am doing

words =
say = 'nil'

while say != ''
  puts 'say a word: '
  talk = gets.chomp
  exit false if gets.chomp.empty?
  words.push talk.to_s
end
puts words
puts words.sort

This is having me input two different words before putsing 'Say a word'

Kindly point me in the right direction.

Redards,

DE.

--
Posted via http://www.ruby-forum.com/\.