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[QUIZ] Dreaming of a Ruby Christmas (#187

Matthew Moss

12/19/2008 8:08:00 PM

-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-

The three rules of Ruby Quiz 2:

..... no rules this week! .....

Suggestion: A [QUIZ] in the subject of emails about the problem
helps everyone on Ruby Talk follow the discussion. Please reply to
the original quiz message, if you can.

Note: I will be out and away for approximately two weeks, so don't
expect to see this quiz summarized and a new quiz available until
either Jan 2nd or 9th.

-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-

## Dreaming of a Ruby Christmas (#187)

It's six more days of Advent, and then... Christmas! Your task is to
create a Ruby script that celebrates Christmas. Create a virtual,
ASCII Christmas tree completely with blinking lights. Or a countdown
calendar 'til December 25th. Or a script that generates the lyrics to
_The Twelve Days of Christmas_. Or whatever you like: some Christmas
creativity.

And... Merry Christmas and a Happy New Year!!!

...

P.S. Yes, I'm politically-incorrect. That said, if you'd rather
celebrate Hanukkah, Kwanzaa, New Year's or another holiday using Ruby
script, please do!
9 Answers

Glen F. Pankow

12/20/2008 7:33:00 AM

0

Matthew Moss wrote:
>
> ## Dreaming of a Ruby Christmas (#187)
>
> It's six more days of Advent, and then... Christmas! Your task is to
> create a Ruby script that celebrates Christmas. Create a virtual, ASCII
> Christmas tree completely with blinking lights. Or a countdown calendar
> 'til December 25th. Or a script that generates the lyrics to _The Twelve
> Days of Christmas_. Or whatever you like: some Christmas creativity.
>
> And... Merry Christmas and a Happy New Year!!!
>

Whenever I wrap Matzmas presents the wrapping turns out extremely
lumpy, crinkly, and stuck with gobs of tape everywhere, and the
contents are always disappointing. This script is no exception.

Take the stuff between the '----- cut here -----' lines and save it in
a file, e.g. 'matzmas.rb'. Feed it to ruby, e.g., 'ruby matzmas.rb'.

Please don't try to learn anything from this code!

- Glen

----- cut here -----

### M E R R Y M A T Z M A S ###

"/|" "/wl)e";eval( "A | A" "A | A" "InHhL" ",Z,%w{-" ",Y&/LH,L*" "cCnd,Hh&/d," "YCB/Hh,Y&YHh," "L&xHh,L*v*nHh,*" "&ghHh,n&nHh,H*nHh" ",*q*v*nHh,Hw*qv*Hh}" "Iq&n*L,Z,[,n&qK,n&qK," "@TwC,LH/&ng,gLBbL@K,@Th" "/**,YC/k*d,Hh/*QdL@K,@FCB" "/,cQqq&ng,=/CcL@K,@F&v*,RBb" "y,g*mL!@K,@S&x,mQ/LhQqL,dBm=&" "ng@K,@S*v*n,dBckL,Q-Hy=&ng@K,@E" "&ghH,d&/L,Q-gqCbb&ng@K,@N&n*,/Qng" "*L,LH*==&ng@K,@T*n,H/yL,Q-cQHch&ng@" "K,@Eq*v*n,&CL,=&=&ng@K,@Tw*qv*,mCnk*y" "L,=QHch&ng@,]IDAJJA2)J*Qch,dC,U&UI=/&nH" ",@\nOn,Hh*,\#{nHhL[&]},dQy,CY,MQHzmQL,my," "H/B*,qCv*,gQv*,HC,m*:\n@I&JdCwnHCD2),dC,UjU" "I=/&nH,@,,,\#{q&n*L[j]}\n@I*ndI=/&nHDD&,ZZ,A)" "?,@,," ",G@,:" ",@,,," "Gnd,Q" "@)I=/" "&nH,@,n*w,v*/L&Cn,CY,RBby!\n@I*nd" "I".tr(' ID/VHLYGBqCA&|*UQJ=Z@K,',
'+;(r/tsfAulo1i8e|a.p=", '))

----- cut here -----

Joshua Ballanco

12/20/2008 6:54:00 PM

0

I feel compelled to express my sheer amazement. Thank you, Glen, you
have made my holiday!

- Josh

On Dec 20, 2008, at 2:33 AM, Glen F. Pankow wrote:

> Matthew Moss wrote:
>> ## Dreaming of a Ruby Christmas (#187)
>> It's six more days of Advent, and then... Christmas! Your task is
>> to create a Ruby script that celebrates Christmas. Create a
>> virtual, ASCII Christmas tree completely with blinking lights. Or a
>> countdown calendar 'til December 25th. Or a script that generates
>> the lyrics to _The Twelve Days of Christmas_. Or whatever you like:
>> some Christmas creativity.
>> And... Merry Christmas and a Happy New Year!!!
>
> Whenever I wrap Matzmas presents the wrapping turns out extremely
> lumpy, crinkly, and stuck with gobs of tape everywhere, and the
> contents are always disappointing. This script is no exception.
>
> Take the stuff between the '----- cut here -----' lines and save it in
> a file, e.g. 'matzmas.rb'. Feed it to ruby, e.g., 'ruby matzmas.rb'.
>
> Please don't try to learn anything from this code!
>
> - Glen
>
> ----- cut here -----
>
> ### M E R R Y M A T Z M A S ###
>
> "/|"> "/wl)e";eval(> "A | A"> "A | A"> > "InHhL"> ",Z,%w{-"> ",Y&/LH,L*"> "cCnd,Hh&/d,"> "YCB/Hh,Y&YHh,"> "L&xHh,L*v*nHh,*"> "&ghHh,n&nHh,H*nHh"> ",*q*v*nHh,Hw*qv*Hh}"> "Iq&n*L,Z,[,n&qK,n&qK,"> "@TwC,LH/&ng,gLBbL@K,@Th"> "/**,YC/k*d,Hh/*QdL@K,@FCB"> "/,cQqq&ng,=/CcL@K,@F&v*,RBb"> "y,g*mL!@K,@S&x,mQ/LhQqL,dBm=&"> "ng@K,@S*v*n,dBckL,Q-Hy=&ng@K,@E"> "&ghH,d&/L,Q-gqCbb&ng@K,@N&n*,/Qng"> "*L,LH*==&ng@K,@T*n,H/yL,Q-cQHch&ng@"> "K,@Eq*v*n,&CL,=&=&ng@K,@Tw*qv*,mCnk*y"> "L,=QHch&ng@,]IDAJJA2)J*Qch,dC,U&UI=/&nH"> ",@\nOn,Hh*,\#{nHhL[&]},dQy,CY,MQHzmQL,my,"> "H/B*,qCv*,gQv*,HC,m*:\n@I&JdCwnHCD2),dC,UjU"> "I=/&nH,@,,,\#{q&n*L[j]}\n@I*ndI=/&nHDD&,ZZ,A)"> "?,@,,"> ",G@,:"> ",@,,,"> "Gnd,Q"> "@)I=/"> "&nH,@,n*w,v*/L&Cn,CY,RBby!\n@I*nd"> "I".tr(' ID/VHLYGBqCA&|*UQJ=Z@K,',
> '+;(r/tsfAulo1i8e|a.p=", '))
>
> ----- cut here -----
>

steven shingler

12/20/2008 6:58:00 PM

0

[Note: parts of this message were removed to make it a legal post.]

I agree, that's v cool :)

On Sat, Dec 20, 2008 at 6:54 PM, Joshua Ballanco <jballanc@gmail.com> wrote:

> I feel compelled to express my sheer amazement. Thank you, Glen, you have
> made my holiday!
>
> - Josh
>
>
> On Dec 20, 2008, at 2:33 AM, Glen F. Pankow wrote:
>
> Matthew Moss wrote:
>>
>>> ## Dreaming of a Ruby Christmas (#187)
>>> It's six more days of Advent, and then... Christmas! Your task is to
>>> create a Ruby script that celebrates Christmas. Create a virtual, ASCII
>>> Christmas tree completely with blinking lights. Or a countdown calendar 'til
>>> December 25th. Or a script that generates the lyrics to _The Twelve Days of
>>> Christmas_. Or whatever you like: some Christmas creativity.
>>> And... Merry Christmas and a Happy New Year!!!
>>>
>>
>> Whenever I wrap Matzmas presents the wrapping turns out extremely
>> lumpy, crinkly, and stuck with gobs of tape everywhere, and the
>> contents are always disappointing. This script is no exception.
>>
>> Take the stuff between the '----- cut here -----' lines and save it in
>> a file, e.g. 'matzmas.rb'. Feed it to ruby, e.g., 'ruby matzmas.rb'.
>>
>> Please don't try to learn anything from this code!
>>
>> - Glen
>>
>> ----- cut here -----
>>
>> ### M E R R Y M A T Z M A S ###
>>
>> "/|">> "/wl)e";eval(>> "A | A">> "A | A">> >> "InHhL">> ",Z,%w{-">> ",Y&/LH,L*">> "cCnd,Hh&/d,">> "YCB/Hh,Y&YHh,">> "L&xHh,L*v*nHh,*">> "&ghHh,n&nHh,H*nHh">> ",*q*v*nHh,Hw*qv*Hh}">> "Iq&n*L,Z,[,n&qK,n&qK,">> "@TwC,LH/&ng,gLBbL@K,@Th">> "/**,YC/k*d,Hh/*QdL@K,@FCB">> "/,cQqq&ng,=/CcL@K,@F&v*,RBb">> "y,g*mL!@K,@S&x,mQ/LhQqL,dBm=&">> "ng@K,@S*v*n,dBckL,Q-Hy=&ng@K,@E">> "&ghH,d&/L,Q-gqCbb&ng@K,@N&n*,/Qng">> "*L,LH*==&ng@K,@T*n,H/yL,Q-cQHch&ng@">> "K,@Eq*v*n,&CL,=&=&ng@K,@Tw*qv*,mCnk*y">> "L,=QHch&ng@,]IDAJJA2)J*Qch,dC,U&UI=/&nH">> ",@\nOn,Hh*,\#{nHhL[&]},dQy,CY,MQHzmQL,my,">> "H/B*,qCv*,gQv*,HC,m*:\n@I&JdCwnHCD2),dC,UjU">> "I=/&nH,@,,,\#{q&n*L[j]}\n@I*ndI=/&nHDD&,ZZ,A)">> "?,@,,">> ",G@,:">> ",@,,,">> "Gnd,Q">> "@)I=/">> "&nH,@,n*w,v*/L&Cn,CY,RBby!\n@I*nd">> "I".tr(' ID/VHLYGBqCA&|*UQJ=Z@K,',
>> '+;(r/tsfAulo1i8e|a.p=", '))
>>
>> ----- cut here -----
>>
>>
>
>

brabuhr

12/22/2008 5:44:00 PM

0

On Fri, Dec 19, 2008 at 3:08 PM, Matthew Moss <matt@moss.name> wrote:
> -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
> ## Dreaming of a Ruby Christmas (#187)
>
> It's six more days of Advent, and then... Christmas! Your task is to create
> a Ruby script that celebrates Christmas. Create a virtual, ASCII Christmas
> tree completely with blinking lights. Or a countdown calendar 'til December
> 25th. Or a script that generates the lyrics to _The Twelve Days of
> Christmas_. Or whatever you like: some Christmas creativity.
>
> And... Merry Christmas and a Happy New Year!!!

I doubt I will find time to do more with this, so Merry Christmas:

> cat RbMasTry.rb
#!/usr/bin/env jruby
require 'java'
require 'mathn'

JFrame = javax.swing.JFrame
JPanel = javax.swing.JPanel
Color = java.awt.Color

frame = JFrame.new("Merry JRuby Christmas")
frame.default_close_operation = JFrame::EXIT_ON_CLOSE
frame.set_size(300, 400)

frame.show

class RbMasTry < JPanel
def paintComponent(graphics)
super(graphics)

[
[400, 150, 50, 125, 50, 400, 50, 50, 50],
[300, 150, 200, 50, 200, 350, 0, 200, 0],
[200, 150, 100, 75, 150, 250],
[100, 150, 50, 100, 100, 150],
].each do |a|
graphics.set_color(Color.new(*a[6..8])) if a[6]

a[0].times do
graphics.draw_line(a[1], a[2], a[3] + rand(a[4]), a[5])
end
end

graphics.set_color(Color.new(255, 255, 0))

360.times do
graphics.draw_line(
150, 50,
150 + rand(25) * Math.sin(rand(2 * Math::PI)),
50 + rand(25) * Math.cos(rand(2 * Math::PI))
)
end

graphics.set_color(Color.new(255, 255, 255))

rand(90).times do
x, y = rand(300), rand(400)
rand(180).times do
graphics.draw_line(
x, y,
x + rand(5) * Math.sin(rand(2 * Math::PI)),
y + rand(5) * Math.cos(rand(2 * Math::PI))
)
end
end
end
end

tree = RbMasTry.new
frame.add(tree)
tree.repaint
tree.revalidate

Daniel Finnie

12/23/2008 12:28:00 AM

0

[Note: parts of this message were removed to make it a legal post.]

Hi, I was wondering about this expression and its siblings:

> Math.sin(rand(2 * Math::PI))

The documentation
<http://www.ruby-doc.org/core/classes/Kernel.html#M005977... that
rand(num) will pick a random integer between 0 and num.abs.to_i
(unless this is different in JRuby). Therefore, the only values that can
come out of this expression are sin(0), sin(1), ... sin(6) which are 0,
841, .909, .141, -.757, -.960, and -.279 (of course these are different for
cosine). Is it just the range -1<y<1? Would rand(2)-1 suffice? What is
the significance of these numbers and doing rand(2pi) instead of rand(6)?

I did enjoy seeing a JRuby solution, especially a GUI-based one. Kudos.

Thanks,
Dan


On Mon, Dec 22, 2008 at 12:44 PM, <brabuhr@gmail.com> wrote:

> On Fri, Dec 19, 2008 at 3:08 PM, Matthew Moss <matt@moss.name> wrote:
> > -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
> > ## Dreaming of a Ruby Christmas (#187)
> >
> > It's six more days of Advent, and then... Christmas! Your task is to
> create
> > a Ruby script that celebrates Christmas. Create a virtual, ASCII
> Christmas
> > tree completely with blinking lights. Or a countdown calendar 'til
> December
> > 25th. Or a script that generates the lyrics to _The Twelve Days of
> > Christmas_. Or whatever you like: some Christmas creativity.
> >
> > And... Merry Christmas and a Happy New Year!!!
>
> I doubt I will find time to do more with this, so Merry Christmas:
>
> > cat RbMasTry.rb
> #!/usr/bin/env jruby
> require 'java'
> require 'mathn'
>
> JFrame = javax.swing.JFrame
> JPanel = javax.swing.JPanel
> Color = java.awt.Color
>
> frame = JFrame.new("Merry JRuby Christmas")
> frame.default_close_operation = JFrame::EXIT_ON_CLOSE
> frame.set_size(300, 400)
>
> frame.show
>
> class RbMasTry < JPanel
> def paintComponent(graphics)
> super(graphics)
>
> [
> [400, 150, 50, 125, 50, 400, 50, 50, 50],
> [300, 150, 200, 50, 200, 350, 0, 200, 0],
> [200, 150, 100, 75, 150, 250],
> [100, 150, 50, 100, 100, 150],
> ].each do |a|
> graphics.set_color(Color.new(*a[6..8])) if a[6]
>
> a[0].times do
> graphics.draw_line(a[1], a[2], a[3] + rand(a[4]), a[5])
> end
> end
>
> graphics.set_color(Color.new(255, 255, 0))
>
> 360.times do
> graphics.draw_line(
> 150, 50,
> 150 + rand(25) * Math.sin(rand(2 * Math::PI)),
> 50 + rand(25) * Math.cos(rand(2 * Math::PI))
> )
> end
>
> graphics.set_color(Color.new(255, 255, 255))
>
> rand(90).times do
> x, y = rand(300), rand(400)
> rand(180).times do
> graphics.draw_line(
> x, y,
> x + rand(5) * Math.sin(rand(2 * Math::PI)),
> y + rand(5) * Math.cos(rand(2 * Math::PI))
> )
> end
> end
> end
> end
>
> tree = RbMasTry.new
> frame.add(tree)
> tree.repaint
> tree.revalidate
>
>

brabuhr

12/23/2008 2:42:00 AM

0

On Mon, Dec 22, 2008 at 7:27 PM, Daniel Finnie <dan@danfinnie.com> wrote:
> Hi, I was wondering about this expression and its siblings:
>
>> Math.sin(rand(2 * Math::PI))
>
> The documentation
> <http://www.ruby-doc.org/core/classes/Kernel.html#M005977... that
> rand(num) will pick a random integer between 0 and num.abs.to_i
> (unless this is different in JRuby). Therefore, the only values that can
> come out of this expression are sin(0), sin(1), ... sin(6) which are 0,
> .841, .909, .141, -.757, -.960, and -.279 (of course these are different for
> cosine). Is it just the range -1<y<1? Would rand(2)-1 suffice? What is
> the significance of these numbers and doing rand(2pi) instead of rand(6)?

No significance other than trying to finish before 1:00. :-) Maybe
I was thinking: sin(rand * 2 * PI? But, yeah rand * 2 - 1 would have
sufficed there.

Thanks.

brabuhr

12/24/2008 3:30:00 PM

0

On Mon, Dec 22, 2008 at 12:44 PM, <brabuhr@gmail.com> wrote:
> On Fri, Dec 19, 2008 at 3:08 PM, Matthew Moss <matt@moss.name> wrote:
>> -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
>> ## Dreaming of a Ruby Christmas (#187)
>
> I doubt I will find time to do more with this, so Merry Christmas:

I did make a few modifications:
* removed unnecessary require
* removed unnecessary trig functions
* changed background color to black
* "animated" the star :)
* removed the snow :(
I never did get around to:
* decorating the tree
* putting presents under the tree

http://github.com/fjc/rubyquiz/tree/...

#!/usr/bin/env jruby
require 'java'

JFrame = javax.swing.JFrame
JPanel = javax.swing.JPanel
Color = java.awt.Color

frame = JFrame.new("Merry JRuby Christmas")
frame.default_close_operation = JFrame::EXIT_ON_CLOSE
frame.set_size(300, 400)

frame.show

class RbMasTry < JPanel
def paintComponent(graphics)
super(graphics)

srand(@tree_seed ||= srand)
[
[400, 150, 50, 125, 50, 400, 50, 50, 50],
[300, 150, 200, 50, 200, 350, 0, 200, 0],
[200, 150, 100, 75, 150, 250],
[100, 150, 50, 100, 100, 150],
].each do |a|
graphics.set_color(Color.new(*a[6..8])) if a[6]

a[0].times do
graphics.draw_line(a[1], a[2], a[3] + rand(a[4]), a[5])
end
end
srand

graphics.set_color(Color.new(255, 255, 0))

360.times do
graphics.draw_line(
150, 50,
150 + rand(25) * (rand * 2 - 1),
50 + rand(25) * (rand * 2 - 1)
)
end
end
end

tree = RbMasTry.new
tree.background = Color.new(0, 0, 0)
frame.add(tree)

loop do
tree.repaint
tree.revalidate
sleep 0.1
end

Robert Dober

12/25/2008 4:43:00 PM

0

> P.S. Yes, I'm politically-incorrect. That said, if you'd rather celebrate
> Hanukkah, Kwanzaa, New Year's or another holiday using Ruby script, please
> do!
So I leave it to the user which message to display ;)
I personally would chose

Health, Love and Peace for All on this World

But if you run my solution with this text you need some patience....

http://pastie....

Cheers
Robert

Robert Dober

12/25/2008 5:12:00 PM

0

On Thu, Dec 25, 2008 at 5:35 PM, Robert Dober <robert.dober@gmail.com> wrote:
>> P.S. Yes, I'm politically-incorrect. That said, if you'd rather celebrate
>> Hanukkah, Kwanzaa, New Year's or another holiday using Ruby script, please
>> do!
> So I leave it to the user which message to display ;)
> I personally would chose
>
> Health, Love and Peace for All on this World
>
> But if you run my solution with this text you need some patience....
Well as I had to fix a bug, I made the random choice converging, now
we can have peace in less time :)

http://pastie....

R.