Timeout question

ruby-talk
1

Hi all,

I iterate an array. During jumping from one element to the next one I
need to get user input from the console. 1) If not input after 5 seconds
I have to jump to the next element. 2)If there is an input within 5
seconds I go for processing the input and then jump to the next
element.

I don't know how to implement the code for question 1. I wonder if
anyone there has a good idea.

Thanks,

Li

···

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2

I iterate an array. During jumping from one element to the next one I
need to get user input from the console. 1) If not input after 5 seconds
I have to jump to the next element. 2)If there is an input within 5
seconds I go for processing the input and then jump to the next
element.

how about Timeout ?
pardon this crude example,

botp@jedi-hopeful:~$ cat test.rb

require 'timeout'
a=(1..10).to_a

STDOUT.sync=true

a.each do |e|
  print "> "

  begin
    Timeout.timeout(5) do
      x=gets
      puts "you entered: #{x}"
    end
  rescue Timeout::Error
  end

  puts e
end

botp@jedi-hopeful:~$ ruby -v test.rb

ruby 1.8.7 (2008-08-08 patchlevel 71) [i686-linux]

1
2
hello

you entered: hello
3

4
5
world

you entered: world
6

7
8
9
10

botp@jedi-hopeful:~$

···

On Sun, Oct 5, 2008 at 8:36 PM, Li Chen <chen_li3@yahoo.com> wrote:

3

This works for me:

···

El Domingo, 5 de Octubre de 2008, Li Chen escribió:

Hi all,

I iterate an array. During jumping from one element to the next one I
need to get user input from the console. 1) If not input after 5 seconds
I have to jump to the next element. 2)If there is an input within 5
seconds I go for processing the input and then jump to the next
element.

I don't know how to implement the code for question 1. I wonder if
anyone there has a good idea.

-------------
ARRAY = %w{A B C D E}

ARRAY.each do |letter|
  
  @t_input = Thread.new do
    input = gets
    puts "#{letter} - String entered by user: #{input}"
  end
  
  @t_timer= Thread.new do
    sleep 3
    puts "Timeout, going to next element..."
    @t_input.terminate
  end
  
  @t_input.join
  @t_timer.terminate

end
-------------

--
Iñaki Baz Castillo

4

Hi,

I ran the script(script a) in irb mode and I find it never jumps to next
element without input from outside/console, which is not what I want.
Here is my requirement for the timeout: 1) iterate an array 2)when
jumping from one element to the next wait for 5 seconds for the input.
If no input after 5 seconds then jump to the next element. If there is
an input then process the input. After that also jump to the next
element.

Also I ran two very short scripts (script b and script c) after reading
doc for Timeout. I find that one works and other doesn't work: without
input from the console the timeout does not work.

Any idea?

Thanks,

Li

####script a: without input the array never move forward ####

C:\Users\Alex>irb
irb(main):001:0> require 'timeout'
=> false
irb(main):002:0> a=(1..10).to_a
=> [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
irb(main):003:0>
irb(main):004:0* STDOUT.sync=true
=> true
irb(main):005:0>
irb(main):006:0* a.each do |e|
irb(main):007:1* print "> "
irb(main):008:1>
irb(main):009:1* begin
irb(main):010:2* Timeout.timeout(5) do
irb(main):011:3* x=gets
irb(main):012:3> puts "you entered: #{x}"
irb(main):013:3> end
irb(main):014:2> rescue Timeout::Error
irb(main):015:2> end
irb(main):016:1>
irb(main):017:1* puts e
irb(main):018:1> end

###script b doesn't work#####

C:\Users\Alex>irb
irb(main):001:0> require 'timeout'
=> false
irb(main):002:0> Timeout.timeout(10){gets}

###script c works by raising an error###

C:\Users\Alex>irb
irb(main):001:0> require 'timeout'
=> false
irb(main):002:0>
irb(main):003:0* Timeout.timeout(10){sleep}
c:/ruby/lib/ruby/1.8/timeout.rb:54:in `irb_binding': execution expired
(Timeout::Error)
        from c:/ruby/lib/ruby/1.8/timeout.rb:56:in `timeout'
        from (irb):3:in `irb_binding'
        from c:/ruby/lib/ruby/1.8/irb/workspace.rb:52:in `irb_binding'
        from c:/ruby/lib/ruby/1.8/irb/workspace.rb:52

···

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5

Iñaki Baz Castillo wrote:

···

El Domingo, 5 de Octubre de 2008, Li Chen escribió:

Hi all,

I iterate an array. During jumping from one element to the next one I
need to get user input from the console. 1) If not input after 5 seconds
I have to jump to the next element. 2)If there is an input within 5
seconds I go for processing the input and then jump to the next
element.

I don't know how to implement the code for question 1. I wonder if
anyone there has a good idea.

This works for me:

-------------
ARRAY = %w{A B C D E}

ARRAY.each do |letter|

  @t_input = Thread.new do
    input = gets
    puts "#{letter} - String entered by user: #{input}"
  end

  @t_timer= Thread.new do
    sleep 3
    puts "Timeout, going to next element..."
    @t_input.terminate
  end

  @t_input.join
  @t_timer.terminate

end

It doesn't work for me. The timeout hangs out for ever if no input is
available.

Li
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6

#..
# ###script b doesn't work#####
# C:\Users\Alex>irb
# irb(main):001:0> require 'timeout'
# => false
# irb(main):002:0> Timeout.timeout(10){gets}

i'm afraid you'll have no luck in windows (yet)... i think the ruby windows team (win32utils) is working something like it... not sure though..

···

From: Li Chen [mailto:chen_li3@yahoo.com]

7

http://codeforpeople.com/lib/ruby/terminator/terminator-0.4.2/README

gem install terminator

a @ http://codeforpeople.com/

···

On Oct 5, 2008, at 7:27 PM, Peña, Botp wrote:

From: Li Chen [mailto:chen_li3@yahoo.com]
#..
# ###script b doesn't work#####
# C:\Users\Alex>irb
# irb(main):001:0> require 'timeout'
# => false
# irb(main):002:0> Timeout.timeout(10){gets}

i'm afraid you'll have no luck in windows (yet)... i think the ruby windows team (win32utils) is working something like it... not sure though..

--
we can deny everything, except that we have the possibility of being better. simply reflect on that.
h.h. the 14th dalai lama

8

#..
# http://codeforpeople.com/lib/ruby/terminator/terminator-0.4.2/README

am sorry, ara, but gets still blocks.. tested using terminator 0.4.4

kind regards -botp

···

From: ara.t.howard [mailto:ara.t.howard@gmail.com]

9

hrm. try 0.4.2 and let me know will ya? no windows box handy...

cheers.

a @ http://codeforpeople.com/

···

On Oct 5, 2008, at 9:24 PM, Peña, Botp wrote:

From: ara.t.howard [mailto:ara.t.howard@gmail.com]
#..
# http://codeforpeople.com/lib/ruby/terminator/terminator-0.4.2/README

am sorry, ara, but gets still blocks.. tested using terminator 0.4.4

--
we can deny everything, except that we have the possibility of being better. simply reflect on that.
h.h. the 14th dalai lama

10

Ara Howard wrote:

···

On Oct 5, 2008, at 9:24 PM, Pe񡬠Botp wrote:

From: ara.t.howard [mailto:ara.t.howard@gmail.com]
#..
# http://codeforpeople.com/lib/ruby/terminator/terminator-0.4.2/README

am sorry, ara, but gets still blocks.. tested using terminator 0.4.4

hrm. try 0.4.2 and let me know will ya? no windows box handy...

cheers.

a @ http://codeforpeople.com/

No luck for 0.4.4 version, either.

Li

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