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Tim Hunter | 1 Oct 2009 01:06
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Re: Can you make a clock?

Scott Andrechek wrote:
> 'Ello. I was just wandering how you update the time in a ruby program
> (like a clock). For instance:
> COMP:WED Sep 30 18:51:30
> COMP:WED Sep 30 18:51:31  #Replacing the above line
> 
> I don't need the entire code for a clock (unless you happen to have it)
> I just need to know the idea of how to make it. Thanks.
> 
> -Scott

Look at the Time class, particularly Time.now

--

-- 
MagickWand for Ruby - http://magickwand.rubyforge.org/
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Ken Bloom | 1 Oct 2009 01:08
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Re: SystemStackError: stack level too deep > how make it deeper?

On Thu, 01 Oct 2009 04:47:28 +0900, Joshua Muheim wrote:

> Hi all
> 
> I have a recursive algorith that must run until it finds the result:
> 
> def p(n)
>   n * (3 * n - 1) / 2
> end
> 
> def h(n)
>   n * (2 * n - 1)
> end
> 
> def find_next_match(p, h)
>   result_p = p(p + 1)
>   result_h = h(h + 1)
>   if result_p == result_h # Resultat gefunden!
>     return result_p
>   else
>     result_p < result_h ? p += 1 : h += 1
> 
>     puts "find next match for p=#{p} (#{result_p}) and h=#{h}
> (#{result_h})"
>     find_next_match(p, h)
>   end
> end

The code you have posted is tail recursive, which means that the original 
function call does nothing after it makes the recursive call, and returns
(Continue reading)

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Thomas Haggett | 1 Oct 2009 01:15

Re: Can you make a clock?

Hi. Am I missing something or do you just need:

	Time.now.strftime("%h %d %H:%M:%S")

To write to a terminal by replacing existing lines you need to send a  
carriage-return without a line-feed (i.e. \r rather than \n on the end  
of lines). If I'm being hacky, I generally just write them directly:

	$stderr.write "\rstuff here"

Just be aware that anything longer than the new line will still be  
visible (i.e.

	$stderr.write "\rlong string"
	$stderr.write "\rshort"

will result in

	"shortstring"

being visible.

If you want to do this properly, you should probably look at the  
ncurses library (http://ncurses-ruby.berlios.de/).

Thomas

On 30 Sep 2009, at 23:54, Scott Andrechek wrote:

> 'Ello. I was just wandering how you update the time in a ruby program
(Continue reading)

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Russell Fulton | 1 Oct 2009 01:22
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Monitors on data structures

Hi

I am trying to use monitors for the first time in ruby.  I am familiar
with the concept but am having some problems making things work.

Background:  I have a program that uses nmap-parser to parse large nmap
scans and uses the call back to deliver results for each host.  The call
back is threaded.

I want to build lists of IP addresses for further investigation from the
callback routine.  I have made a class AddressList:

class AddressList < Array
  include MonitorMixin

  def initialise  # redundant ?
  super
  end

  def <<(addr)
    synchronise do  # make sure we don't clobber another thread
      super( addr )
    end
  end

end

we need to protect the push code so that to threads don't collide so I
put a synchronise block around it.
(Continue reading)

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Bertram Scharpf | 1 Oct 2009 01:38
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Re: Can you make a clock?

Hi,

Am Donnerstag, 01. Okt 2009, 07:54:14 +0900 schrieb Scott Andrechek:
> 'Ello. I was just wandering how you update the time in a ruby program
> (like a clock). For instance:
> COMP:WED Sep 30 18:51:30
> COMP:WED Sep 30 18:51:31  #Replacing the above line

You need a signal triggered every second so that you can refresh
the display. Just three weeks ago I posted this:

  http://aspn.activestate.com/ASPN/Mail/Message/ruby-talk/3750044

Good luck!

Bertram

--

-- 
Bertram Scharpf
Stuttgart, Deutschland/Germany
http://www.bertram-scharpf.de
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David Masover | 1 Oct 2009 01:44
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Re: Exceptional Rails Developer

On Wednesday 30 September 2009 01:45:27 pm Zundra Daniel wrote:
> At least he didn't say "Rockstar" or "Ninja"

Well, what's he going to say, "Average"?

We are looking to hire a Mediocre Rails developer to join our could-run-out-
of-funding-at-any-moment startup...

It just doesn't have the same ring to it, I guess.

(Actually, I'd probably apply if I wasn't currently in school. I was just 
feeling snarky today.)
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Greg Donald | 1 Oct 2009 01:54
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Re: Exceptional Rails Developer

On Wed, Sep 30, 2009 at 6:44 PM, David Masover <ninja <at> slaphack.com> wrote:
> On Wednesday 30 September 2009 01:45:27 pm Zundra Daniel wrote:
>> At least he didn't say "Rockstar" or "Ninja"
>
> Well, what's he going to say, "Average"?

Why not?  It's unrealistic to think every company wants and can afford
the best.  Many will have to settle for who they can find.

At a minimum they should include something like "and willing to pay
exceptional wages too!" when asking for an "exceptional" coder.  I saw
no such mention.

And finally, to the OP, did you learn something?  No?  Well here's the
take-away: We programmers all already think we are exceptional.  You
won't make less of us apply for a job by trying to single out people
using silly buzzwords.  So stop it.

--

-- 
Greg Donald
http://destiney.com/
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Scott Andrechek | 1 Oct 2009 02:03
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Re: Can you make a clock?

I have tried all 3 tips and although i see how it would work maybe if i 
be more specific it'll help you help me : ) . I am making a program 
notify me how many days are left till an event happens (in the case of 
my program when a game comes out). This is what I use:

puts 'Hey Scott : D'
time=Time.new
time_cod=Time.mktime(2009,11,13)
time_operationflash=Time.mktime(2009,10,6)
time_assassinscreed2=Time.mktime(2009,11,17)
time_godofwar3=Time.mktime(2010,3)
if (time_cod.to_i<0 or time_cod.to_i==0)
  puts 'It\'s already out!'
  else
    puts 'There are ' + (((((time_cod-time)/60)/60)/24).to_i).to_s + ' 
days left until Call of Duty 4: Modern Warfare 2 is released'
  end
  if (time_operationflash.to_i<0 or time_operationflash.to_i==0)
    puts 'It\'s already out!'
    else
      puts 'There are ' + 
(((((time_operationflash-time)/60)/60)/24).to_i).to_s + ' days left 
until Operation Flashpoint: Dragon Rising is released'
    end
    if (time_assassinscreed2.to_i<0 or time_assassinscreed2==0)
      puts 'It\'s already out!'
else
puts 'There are ' + 
(((((time_assassinscreed2-time)/60)/60)/24).to_i).to_s + ' days left 
until Assassin\'s Creed 2 is released'
(Continue reading)

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David Masover | 1 Oct 2009 02:07
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Re: SystemStackError: stack level too deep > how make it deeper?

On Wednesday 30 September 2009 04:17:31 pm Rob Biedenharn wrote:

> your algorithm is "tail recursive" and that's partly why you run out
> of stack space in a language like Ruby, but in a language optimized
> for tail recursion it might have worked.

Probably would have.

The other thing is to note that the question the subject is asking should 
never be asked. If you're in a language that optimizes tail-recursing, it's 
probably about as efficient as a loop.

If you're in a language that doesn't optimize tail-recursing, the last thing 
you want to do is increase the size of the stack. That would just give you the 
same problem again later, and waste tons of RAM.
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Reid Thompson | 1 Oct 2009 02:27

Re: Can you make a clock?

Scott Andrechek wrote:
> I have tried all 3 tips and although i see how it would work maybe if i 
> be more specific it'll help you help me : ) . I am making a program 
> notify me how many days are left till an event happens (in the case of 
> my program when a game comes out). This is what I use:
> 
> puts 'Hey Scott : D'
> time=Time.new
> time_cod=Time.mktime(2009,11,13)
> time_operationflash=Time.mktime(2009,10,6)
> time_assassinscreed2=Time.mktime(2009,11,17)
> time_godofwar3=Time.mktime(2010,3)
> if (time_cod.to_i<0 or time_cod.to_i==0)
>   puts 'It\'s already out!'
>   else
>     puts 'There are ' + (((((time_cod-time)/60)/60)/24).to_i).to_s + ' 
> days left until Call of Duty 4: Modern Warfare 2 is released'
>   end
>   if (time_operationflash.to_i<0 or time_operationflash.to_i==0)
>     puts 'It\'s already out!'
>     else
>       puts 'There are ' + 
> (((((time_operationflash-time)/60)/60)/24).to_i).to_s + ' days left 
> until Operation Flashpoint: Dragon Rising is released'
>     end
>     if (time_assassinscreed2.to_i<0 or time_assassinscreed2==0)
>       puts 'It\'s already out!'
> else
> puts 'There are ' + 
> (((((time_assassinscreed2-time)/60)/60)/24).to_i).to_s + ' days left
(Continue reading)

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