Ruby 2.0

Shashank_Date2 · 6 December 2004 04:03

Brian Mitchell wrote:

Is this an example of a Sierpinski Triangle?

Yes.

And we (my son and I) are struggling with writing the recursive version of it in MSWLogo (and then Ruby).

We are not quite done yet, but the basic structure is ready and needs some tweaking for the perfect alignment of the triangles.

I am working on finding more cool one liners that are short enough for a sig.

Cool ... that should keep us busy for a while

-- shanko

···

On Mon, 6 Dec 2004 12:23:06 +0900, Lyndon Samson > <lyndon.samson@gmail.com> wrote:

James_Edward_Gray_II · 6 December 2004 05:05

Subject change: In my spare time, I've been scanning the web for the perfect simulation to do as a Ruby Quiz. I don't want to do Life like everyone else does. We can do better.

So, if you can point me to a fun simulation (well described), I'll be very grateful.

If you write it up and submit it as a Ruby Quiz, you'll be my hero.

Submit address: rubyquiz@grayproductions.net

Sorry to derail the thread. We now return you to your regularly scheduled discussion of Ruby signatures...

James Edward Gray II

···

On Dec 5, 2004, at 9:51 PM, Brian Mitchell wrote:

I came up with a cellular automata simulator but the input and rule
set took up too much space.

George5 · 6 December 2004 11:43

Brian Mitchell wrote:

Is this an example of a Sierpinski Triangle?

Yes.

I am working on finding more cool one liners that are short enough for a sig.

actually a four liner...

ruby -rcomplex -e'c,m,w,h=Complex(-0.75,0.136),50,200,100;puts"P6\n"+\
"#{w} #{h}\n255";(0...h).each{|j|(0...w).each{|i|n,z=0,Complex(0.9*i/w,\
0.9*j/h);while n<=m&&(z-c).abs<=2;z=z*z+c;n+=1 end;print [20+n*10,0,\
rand*99].pack("C*")}}'|display

Regards,

Michael

···

On Mon, 6 Dec 2004 12:23:06 +0900, Lyndon Samson > <lyndon.samson@gmail.com> wrote:

Claus_Spitzer · 7 December 2004 03:04

I'd love to see more one-liners. They're a fun way to spread the Ruby gospel

Cheers.

-- CWS

···

On Mon, 6 Dec 2004 12:51:01 +0900, Brian Mitchell <binary42@gmail.com> wrote:

I am working on finding more cool one liners that are short enough for a sig.

I came up with a cellular automata simulator but the input and rule
set took up too much space. So I will have to find something else....
if not I will be sticking to my triangle signature. It is always fun
to try and push the limits of a language by doing things like this.

irb,

Brian Mitchell
---
T.B.D.

Oliver_Cromm1 · 7 December 2004 22:22

Brian Mitchell wrote:

I am working on finding more cool one liners that are short enough
for a sig.

I came up with a cellular automata simulator but the input and
rule set took up too much space. So I will have to find something
else.... if not I will be sticking to my triangle signature.

You inspired me to another triangle one.

···

--
Oliver Cromm
ruby -e'require "Matrix";a=[1];(1..10).each{|n| print " "*(10-n)*3,a.map{|i|\
i.to_s.center(6)}.join,$/;a.push(0);a=(Vector[*a]+Vector[*a.reverse]).to_a}'

Gavin_Sinclair · 6 December 2004 12:44

Running that on Cygwin, I get

display: unable to open X server `'.
-e:4:in `write': Broken pipe (Errno::EPIPE)
        from -e:4:in `print'
        from -e:4
        from -e:2:in `each'
        from -e:2
        from -e:2:in `each'
        from -e:2

Probably a platform issue, but I gotta say I'm a bit surprised.

Gavin

···

On Monday, December 6, 2004, 10:43:50 PM, Michael wrote:

ruby -rcomplex
-e'c,m,w,h=Complex(-0.75,0.136),50,200,100;puts"P6\n"+\
"#{w}
#{h}\n255";(0...h).each{|j|(0...w).each{|i|n,z=0,Complex(0.9*i/w,\
0.9*j/h);while n<=m&&(z-c).abs<=2;z=z*z+c;n+=1 end;print [20+n*10,0,\
rand*99].pack("C*")}}'|display

Julius_Plenz · 6 December 2004 22:22

* Lyndon Samson <lyndon.samson@gmail.com> [2004-12-06]:

Stay tuned for a mail client written in or with ruby embedded that
lets you execute your sigs

Well, maybe that's overkill. This simple script is as good...

#v+
#!/usr/bin/env ruby
# Julius Plenz <jp@cvmx.de>

@exec =
@lines =
@lines << $_.chomp while gets

@lines.reverse.each do |line|
  unless line =~ /^-- $/
    @exec << line
  else
    @exec.reverse!
    ruby = IO.popen("ruby", "w+")
    @exec.each { |s| ruby.puts s }
    ruby.puts "__END__"
    ruby.each { |o| puts o }
    ruby.close
  end
end

# vim:set ft=ruby sw=2 et:
#v-

Julius

···

--
Julius Plenz <jp@cvmx.de> http://www.plenz.com/

Brian_SchrA_der · 7 December 2004 22:46

You've got a type in there. It should be require "matrix" not require "Matrix".
(Or maybe it works on a windows system, because its case insensitive?)

Regards,

Brian

···

On Wed, 8 Dec 2004 07:22:31 +0900 Oliver Cromm <lispamateur@internet.uqam.ca> wrote:

Oliver Cromm
ruby -e'require "Matrix";a=[1];(1..10).each{|n| print " "*(10-n)*3,a.map{|i|\
i.to_s.center(6)}.join,$/;a.push(0);a=(Vector[*a]+Vector[*a.reverse]).to_a}'

--
Brian Schröder
http://www.brian-schroeder.de/

Josh · 8 December 2004 23:57

Michael Neumann <mneumann@ntecs.de> writes:

actually a four liner...

ruby -rcomplex -e'c,m,w,h=Complex(-0.75,0.136),50,200,100;puts"P6\n"+\
"#{w} #{h}\n255";(0...h).each{|j|(0...w).each{|i|n,z=0,Complex(0.9*i/w,\
0.9*j/h);while n<=m&&(z-c).abs<=2;z=z*z+c;n+=1 end;print [20+n*10,0,\
rand*99].pack("C*")}}'|display

Wow, this is great.

Josh

George5 · 6 December 2004 13:15

Gavin Sinclair wrote:

···

On Monday, December 6, 2004, 10:43:50 PM, Michael wrote:

ruby -rcomplex
-e'c,m,w,h=Complex(-0.75,0.136),50,200,100;puts"P6\n"+\
"#{w}
#{h}\n255";(0...h).each{|j|(0...w).each{|i|n,z=0,Complex(0.9*i/w,\
0.9*j/h);while n<=m&&(z-c).abs<=2;z=z*z+c;n+=1 end;print [20+n*10,0,\
rand*99].pack("C*")}}'|display

Running that on Cygwin, I get

display: unable to open X server `'.
-e:4:in `write': Broken pipe (Errno::EPIPE)
        from -e:4:in `print'
        from -e:4
        from -e:2:in `each'
        from -e:2
        from -e:2:in `each'
        from -e:2

Probably a platform issue, but I gotta say I'm a bit surprised.

Probably due to 'display'. The ruby code generates a .pnm image, which is then displayed using 'display' (ImageMagick).

Regards,

Michael

Oliver_Cromm1 · 7 December 2004 23:12

Brian Schröder wrote:

···

Oliver Cromm <lispamateur@internet.uqam.ca> wrote:

ruby -e'require "Matrix";a=[1];(1..10).each{|n| print " "*(10-n)*3,a.map{|i|\
i.to_s.center(6)}.join,$/;a.push(0);a=(Vector[*a]+Vector[*a.reverse]).to_a}'

You've got a type in there. It should be require "matrix" not
require "Matrix". (Or maybe it works on a windows system, because
its case insensitive?)

Yes, it works on Windows, but I changed it for future use. Thanks.
--
ruby -e'require "matrix";a=[1];(1..10).each{|n| print " "*(10-n)*3,a.map{|i|\
i.to_s.center(6)}.join,$/;a.push(0);a=(Vector[*a]+Vector[*a.reverse]).to_a}'

Gavin_Sinclair · 7 December 2004 00:59

But the code doesn't require rmagick, does it?

Gavin

···

On Tuesday, December 7, 2004, 12:15:42 AM, Michael wrote:

Gavin Sinclair wrote:

On Monday, December 6, 2004, 10:43:50 PM, Michael wrote:

ruby -rcomplex
-e'c,m,w,h=Complex(-0.75,0.136),50,200,100;puts"P6\n"+\
"#{w}
#{h}\n255";(0...h).each{|j|(0...w).each{|i|n,z=0,Complex(0.9*i/w,\
0.9*j/h);while n<=m&&(z-c).abs<=2;z=z*z+c;n+=1 end;print [20+n*10,0,\
rand*99].pack("C*")}}'|display

Running that on Cygwin, I get

display: unable to open X server `'.
-e:4:in `write': Broken pipe (Errno::EPIPE)
        from -e:4:in `print'
        from -e:4
        from -e:2:in `each'
        from -e:2
        from -e:2:in `each'
        from -e:2

Probably a platform issue, but I gotta say I'm a bit surprised.

Probably due to 'display'. The ruby code generates a .pnm image, which
is then displayed using 'display' (ImageMagick).

T_Onoma · 7 December 2004 23:53

A touch smaller:

ruby -e'require"matrix";a=[1];(1..10).each{|n|print" "*(10-n)*3,a.map{|i|\
i.to_s.center(6)}.join,$/;a<<0;a=(Vector[*a]+Vector[*a.reverse]).to_a}'

···

On Tuesday 07 December 2004 06:12 pm, Oliver Cromm wrote:

ruby -e'require "matrix";a=[1];(1..10).each{|n| print "
"*(10-n)*3,a.map{|i|\
i.to_s.center(6)}.join,$/;a.push(0);a=(Vector[*a]+Vector[*a.reverse]).to_a}
'

George5 · 7 December 2004 13:07

Gavin Sinclair wrote:

···

On Tuesday, December 7, 2004, 12:15:42 AM, Michael wrote:

Gavin Sinclair wrote:

On Monday, December 6, 2004, 10:43:50 PM, Michael wrote:

ruby -rcomplex
-e'c,m,w,h=Complex(-0.75,0.136),50,200,100;puts"P6\n"+\
"#{w}
#{h}\n255";(0...h).each{|j|(0...w).each{|i|n,z=0,Complex(0.9*i/w,\
0.9*j/h);while n<=m&&(z-c).abs<=2;z=z*z+c;n+=1 end;print [20+n*10,0,\
rand*99].pack("C*")}}'|display

Running that on Cygwin, I get

display: unable to open X server `'.
-e:4:in `write': Broken pipe (Errno::EPIPE)
       from -e:4:in `print'
       from -e:4
       from -e:2:in `each'
       from -e:2
       from -e:2:in `each'
       from -e:2

Probably a platform issue, but I gotta say I'm a bit surprised.

Probably due to 'display'. The ruby code generates a .pnm image, which
is then displayed using 'display' (ImageMagick).

But the code doesn't require rmagick, does it?

no it doesn't require rmagick. it generates the pnm image itself (and this in 4 lines ;-).

The "display" command is there only to view the pnm image, oterhwise it would print the image on STDOUT.

Regards,

Michael

Mauricio_Fernndez · 8 December 2004 00:27

Some obvious modifications:

ruby -rmatrix -le'a=[1];10.times{|n|print" "*(9-n)*3,"%3d "*a.size%a;a<<0;a=(
Vector[*a]+Vector[*a.reverse]).to_a}'

There's still potential for further optimization but I prefer to zzzZZ.

···

On Wed, Dec 08, 2004 at 08:53:27AM +0900, trans. (T. Onoma) wrote:

On Tuesday 07 December 2004 06:12 pm, Oliver Cromm wrote:
> ruby -e'require "matrix";a=[1];(1..10).each{|n| print "
> "*(10-n)*3,a.map{|i|\
> i.to_s.center(6)}.join,$/;a.push(0);a=(Vector[*a]+Vector[*a.reverse]).to_a}
>'

A touch smaller:

ruby -e'require"matrix";a=[1];(1..10).each{|n|print" "*(10-n)*3,a.map{|i|\
i.to_s.center(6)}.join,$/;a<<0;a=(Vector[*a]+Vector[*a.reverse]).to_a}'

--
Hassle-free packages for Ruby?
RPA is available from http://www.rubyarchive.org/

Oliver_Cromm1 · 8 December 2004 05:37

Mauricio Fernández wrote:

ruby -e'require "matrix";a=[1];(1..10).each{|n| print "
"*(10-n)*3,a.map{|i|\
i.to_s.center(6)}.join,$/;a.push(0);a=(Vector[*a]+Vector[*a.reverse]).to_a}
'

A touch smaller:

ruby -e'require"matrix";a=[1];(1..10).each{|n|print" "*(10-n)*3,a.map{|i|\
i.to_s.center(6)}.join,$/;a<<0;a=(Vector[*a]+Vector[*a.reverse]).to_a}'

Some obvious modifications:

ruby -rmatrix -le'a=[1];10.times{|n|print" "*(9-n)*3,"%3d "*a.size%a;a<<0;a=(
Vector[*a]+Vector[*a.reverse]).to_a}'

Optimal once you know the stuff - I'm learning!

There's still potential for further optimization but I prefer to zzzZZ.

a.size = n+1, better yet:

ruby -rmatrix -le'a=[1];1.upto(10){|n|print" "*(10-n)*3,"%3d "*n%a
a<<0;a=(Vector[*a]+Vector[*a.reverse]).to_a}'

I found the Vector stuff /kakkou ii/, but without, it's shorter.
Accepting the extra indent, my shortest is:

ruby -le'a=;10.times{|n|a<<1;print" "*(9-n)*3,"%6d"*(n+1)%a
n.downto(1){|i|a[i]+=a[i-1]}}'

···

On Wed, Dec 08, 2004 at 08:53:27AM +0900, trans. (T. Onoma) wrote:

On Tuesday 07 December 2004 06:12 pm, Oliver Cromm wrote:

--
Oliver C.

Oliver_Cromm1 · 8 December 2004 05:52

Mauricio Fernández wrote:

ruby -e'require "matrix";a=[1];(1..10).each{|n| print "
"*(10-n)*3,a.map{|i|\
i.to_s.center(6)}.join,$/;a.push(0);a=(Vector[*a]+Vector[*a.reverse]).to_a}
'

A touch smaller:

ruby -e'require"matrix";a=[1];(1..10).each{|n|print" "*(10-n)*3,a.map{|i|\
i.to_s.center(6)}.join,$/;a<<0;a=(Vector[*a]+Vector[*a.reverse]).to_a}'

Some obvious modifications:

ruby -rmatrix -le'a=[1];10.times{|n|print" "*(9-n)*3,"%3d "*a.size%a;a<<0;a=(
Vector[*a]+Vector[*a.reverse]).to_a}'

Obvious once you know the stuff - I'm learning!

There's still potential for further optimization but I prefer to zzzZZ.

a.size = n+1, better yet:

ruby -rmatrix -le'a=[1];1.upto(10){|n|print" "*(10-n)*3,"%3d "*n%a
a<<0;a=(Vector[*a]+Vector[*a.reverse]).to_a}'

I found the Vector stuff /kakkou ii/, but without, it's shorter.
Accepting the extra indent, my shortest now is:

ruby -le'a=;10.times{|n|a<<1;print" "*(9-n)*3,"%6d"*(n+1)%a
n.downto(1){|i|a[i]+=a[i-1]}}'

···

On Wed, Dec 08, 2004 at 08:53:27AM +0900, trans. (T. Onoma) wrote:

On Tuesday 07 December 2004 06:12 pm, Oliver Cromm wrote:

--
Oliver C.

T_Onoma · 8 December 2004 06:46

Amazing. Is any one making a collection of these?

T.

···

On Wednesday 08 December 2004 12:52 am, Oliver Cromm wrote:

Mauricio Fernández wrote:
> On Wed, Dec 08, 2004 at 08:53:27AM +0900, trans. (T. Onoma) wrote:
>> On Tuesday 07 December 2004 06:12 pm, Oliver Cromm wrote:
>>> ruby -e'require "matrix";a=[1];(1..10).each{|n| print "
>>> "*(10-n)*3,a.map{|i|\
>>> i.to_s.center(6)}.join,$/;a.push(0);a=(Vector[*a]+Vector[*a.reverse]).t
>>>o_a} '
>>
>> A touch smaller:
>>
>> ruby -e'require"matrix";a=[1];(1..10).each{|n|print"
>> "*(10-n)*3,a.map{|i|\
>> i.to_s.center(6)}.join,$/;a<<0;a=(Vector[*a]+Vector[*a.reverse]).to_a}'
>
> Some obvious modifications:
>
> ruby -rmatrix -le'a=[1];10.times{|n|print" "*(9-n)*3,"%3d
> "*a.size%a;a<<0;a=( Vector[*a]+Vector[*a.reverse]).to_a}'

Obvious once you know the stuff - I'm learning!

> There's still potential for further optimization but I prefer to zzzZZ.

a.size = n+1, better yet:

  ruby -rmatrix -le'a=[1];1.upto(10){|n|print" "*(10-n)*3,"%3d "*n%a
  a<<0;a=(Vector[*a]+Vector[*a.reverse]).to_a}'

I found the Vector stuff /kakkou ii/, but without, it's shorter.
Accepting the extra indent, my shortest now is:

  ruby -le'a=;10.times{|n|a<<1;print" "*(9-n)*3,"%6d"*(n+1)%a
  n.downto(1){|i|a[i]+=a[i-1]}}'

Mauricio_Fernndez · 8 December 2004 11:35

> Some obvious modifications:
>
> ruby -rmatrix -le'a=[1];10.times{|n|print" "*(9-n)*3,"%3d "*a.size%a;a<<0;a=(
> Vector[*a]+Vector[*a.reverse]).to_a}'

Obvious once you know the stuff - I'm learning!

> There's still potential for further optimization but I prefer to zzzZZ.

a.size = n+1, better yet:

Nice catch, we save 1 char.

ruby -rmatrix -le'a=[1];1.upto(10){|n|print" "*(10-n)*3,"%3d "*n%a
a<<0;a=(Vector[*a]+Vector[*a.reverse]).to_a}'

I found the Vector stuff /kakkou ii/, but without, it's shorter.

Yes, that's what I had in mind.

Accepting the extra indent, my shortest now is:

ruby -le'a=;10.times{|n|a<<1;print" "*(9-n)*3,"%6d"*(n+1)%a
n.downto(1){|i|a[i]+=a[i-1]}}'

ruby -e'a=;10.times{|n|a<<1;puts" "*(9-n)*3+"%6d"*(n+1)%a;n.
times{|i|a[n]+=a[n-=1]}}'

It can be made to fit in a canonical 80-char line (actually 78):

a=;10.times{|n|a<<1;puts" "*(9-n)*3+"%6d"*(n+1)%a;n.times{|i|a[n]+=a[n-=1]}}

The indentation code might allow further optimization.

···

On Wed, Dec 08, 2004 at 02:52:35PM +0900, Oliver Cromm wrote:

--
Hassle-free packages for Ruby?
RPA is available from http://www.rubyarchive.org/

Dave_Burt2 · 8 December 2004 08:07

Check the thread [SOT]Signatures and one liners for more sigs. And there's a
duck one floating around, too.

Cheers,
Dave

i=1;loop{w=i&1==1?'v^':'^v';$><<"\e[2J\e[0;0H#{
' '*10}_\n #{i&1==1?' '*7+'<':'Quack! >'}(*)____,\n#{
' '*9}(` =~~/\n#{w*5}`---'#{w*4}";i+=sleep 1}

···

"trans. (T. Onoma)" <transami@runbox.com> wrote:

On Wednesday 08 December 2004 12:52 am, Oliver Cromm wrote:
> ruby -le'a=;10.times{|n|a<<1;print" "*(9-n)*3,"%6d"*(n+1)%a
> n.downto(1){|i|a[i]+=a[i-1]}}'

Amazing. Is any one making a collection of these?

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