Ruby T-Shirt Idea

[Austin King]

Keywords: advocacy, silly t-shirts, Request For Feedback

Hello from Yet Another Newbie Ruby User,
I am not religious about languages, but have been really enjoying Ruby
and need a new T-shirt for around the office. So I thought I would
make one.

Picture this in bold red print on a white shirt

class RubyFan < OOProgrammer
include OpenSource
def initialize( name, talent )
super( name, talent )
# adjust for inherent Rubyness
@productivity = CodeFu.MASTER * talent
@stress_level = @stress_level / 2
@street_cred = true;
end
end
# [url]http://ruby-lang.org[/url]

any thoughts? Anything inherantly un-rubyish?

-- Ozten

[Daniel Carrera]

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I like the idea of Ruby t-shirts, but your code snipet is rather long for
a t-shirt. It has to be quick and catchy. How about this:

a, b = b, a
Who needs temp variables?
[url]http://www.ruby-lang.org[/url]


Cheers,
Daniel.


On Thu, Jul 10, 2003 at 07:35:51AM +0900, Austin King wrote:

> Keywords: advocacy, silly t-shirts, Request For Feedback
>
> Hello from Yet Another Newbie Ruby User,
> I am not religious about languages, but have been really enjoying Ruby
> and need a new T-shirt for around the office. So I thought I would
> make one.
>
> Picture this in bold red print on a white shirt
>
> class RubyFan < OOProgrammer
> include OpenSource
> def initialize( name, talent )
> super( name, talent )
> # adjust for inherent Rubyness
> @productivity = CodeFu.MASTER * talent
> @stress_level = @stress_level / 2
> @street_cred = true;
> end
> end
> # [url]http://ruby-lang.org[/url]
>
> any thoughts? Anything inherantly un-rubyish?
>
> -- Ozten

- --
Daniel Carrera | OpenPGP fingerprint:
Graduate TA, Math Dept | 6643 8C8B 3522 66CB D16C D779 2FDD 7DAC 9AF7 7A88
UMD (301) 405-5137 | [url]http://www.math.umd.edu/~dcarrera/pgp.html[/url]
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[gabriele renzi]

il Thu, 10 Jul 2003 07:40:13 +0900, Daniel Carrera
<dcarrera@math.umd.edu> ha scritto::

>-----BEGIN PGP SIGNED MESSAGE-----
>Hash: SHA1
>
>I like the idea of Ruby t-shirts, but your code snipet is rather long for
>a t-shirt. It has to be quick and catchy. How about this:
>
> a, b = b, a
> Who needs temp variables?
> [url]http://www.ruby-lang.org[/url]
>

5.times { puts 'ruby r0x!'}

[Xavier Noria]

On Thursday 10 July 2003 01:16, gabriele renzi wrote:

> il Thu, 10 Jul 2003 07:40:13 +0900, Daniel Carrera
>
> <dcarrera@math.umd.edu> ha scritto::

> >-----BEGIN PGP SIGNED MESSAGE-----
> >Hash: SHA1
> >
> >I like the idea of Ruby t-shirts, but your code snipet is rather
> > long for a t-shirt. It has to be quick and catchy. How about
> > this:
> >
> > a, b = b, a
> > Who needs temp variables?
> > [url]http://www.ruby-lang.org[/url]

>
> 5.times { puts 'ruby r0x!'}

"Please, keep your language clean" (seen on freenode#ruby-lang :-)

-- fxn

[Daniel Carrera]

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On Thu, Jul 10, 2003 at 12:38:10PM +0900, Hal E. Fulton wrote:

> Hmm, there's the classic "grep in four lines." Can't recall
> exactly how it looks -- I think it used a perlism that I'm
> not used to.

Doesn't sound that hard. Could someone remind me how to use the File.eachline method? (I
know I've gotten it at least partially wrong there).

Or could someone give me a link to PickAxe so I can look it up?

Thanks.
- --
Daniel Carrera | OpenPGP fingerprint:
Graduate TA, Math Dept | 6643 8C8B 3522 66CB D16C D779 2FDD 7DAC 9AF7 7A88
UMD (301) 405-5137 | [url]http://www.math.umd.edu/~dcarrera/pgp.html[/url]
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[Daniel Carrera]

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Okay, ignore my last question (except the one about a link to PicAxe). I just figured the
syntax (basically by trying every possible permutation).

Now I have a new question: Turning a string into a regex.
Example:

dcarrera ~ $ irb

>> var = "he"

=> "he"

>> str = "hello world"

=> "hello world"

>> str =~ /var/

=> nil

What am I doing wrong?


On Thu, Jul 10, 2003 at 02:16:15PM +0900, Daniel Carrera wrote:

> On Thu, Jul 10, 2003 at 12:38:10PM +0900, Hal E. Fulton wrote:
>

> > Hmm, there's the classic "grep in four lines." Can't recall
> > exactly how it looks -- I think it used a perlism that I'm
> > not used to.

>
> Doesn't sound that hard. Could someone remind me how to use the File.eachline method? (I
> know I've gotten it at least partially wrong there).
>
> Or could someone give me a link to PickAxe so I can look it up?
>
> Thanks.
> --
> Daniel Carrera | OpenPGP fingerprint:
> Graduate TA, Math Dept | 6643 8C8B 3522 66CB D16C D779 2FDD 7DAC 9AF7 7A88
> UMD (301) 405-5137 | [url]http://www.math.umd.edu/~dcarrera/pgp.html[/url]

- --
Daniel Carrera | OpenPGP fingerprint:
Graduate TA, Math Dept | 6643 8C8B 3522 66CB D16C D779 2FDD 7DAC 9AF7 7A88
UMD (301) 405-5137 | [url]http://www.math.umd.edu/~dcarrera/pgp.html[/url]
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[Daniel Carrera]

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On Thu, Jul 10, 2003 at 12:38:10PM +0900, Hal E. Fulton wrote:

> Hmm, there's the classic "grep in four lines." Can't recall
> exactly how it looks -- I think it used a perlism that I'm
> not used to.

I just thought of a dead give-away:

dcarrera ~ $ cat myfile
cat
dog
horse
zebra
tiger
dcarrera ~ $ grep a myfile
cat
zebra
dcarrera ~ $ ruby -e 'puts ARGF.grep(/a/)' myfile
cat
zebra

Cheers,
- --
Daniel Carrera | OpenPGP fingerprint:
Graduate TA, Math Dept | 6643 8C8B 3522 66CB D16C D779 2FDD 7DAC 9AF7 7A88
UMD (301) 405-5137 | [url]http://www.math.umd.edu/~dcarrera/pgp.html[/url]
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[Hal E. Fulton]

----- Original Message -----
From: "Daniel Carrera" <dcarrera@math.umd.edu>
To: "ruby-talk ML" <ruby-talk@ruby-lang.org>
Sent: Thursday, July 10, 2003 12:27 AM
Subject: Re: Ruby T-Shirt Idea

> I just thought of a dead give-away:
>
> dcarrera ~ $ cat myfile
> cat
> dog
> horse
> zebra
> tiger
> dcarrera ~ $ grep a myfile
> cat
> zebra
> dcarrera ~ $ ruby -e 'puts ARGF.grep(/a/)' myfile
> cat
> zebra

Quite right.

The part I can't remember was one of those
"implicit loop" things that I never use...

BTW, var = Regexp.new(Regexp.escape(var)) will
also do that conversion... probably more than
two ways... ;)

As for interpolating a variable into a regex,
I'm not sure whether it does automatic escaping
or not. I'd like to think it does, but there
may be some good reason it doesn't. Too lazy to
test right now...

Hal

--
Hal Fulton
[email]hal9000@hypermetrics.com[/email]

[Daniel Carrera]

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On Thu, Jul 10, 2003 at 02:27:45PM +0900, Hal E. Fulton wrote:

> > What am I doing wrong?

>
> You can do str =~ /#{var}/ I think...

Whoohoo!!!!

dcarrera ~ $ alias mygrep="ruby -e 're=ARGV.shift; puts ARGF.grep(/#{re}/)'"
dcarrera ~ $ mygrep a myfile
cat
zebra


Whheeee!!!

- --
Daniel Carrera | OpenPGP fingerprint:
Graduate TA, Math Dept | 6643 8C8B 3522 66CB D16C D779 2FDD 7DAC 9AF7 7A88
UMD (301) 405-5137 | [url]http://www.math.umd.edu/~dcarrera/pgp.html[/url]
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[Mauricio Fernández]

On Thu, Jul 10, 2003 at 12:38:10PM +0900, Hal E. Fulton wrote:

> > What can we use that demonstrates something that Ruby's uniquely
> > useful for in 4 lines or less?

>
> Hmm, there's the classic "grep in four lines." Can't recall
> exactly how it looks -- I think it used a perlism that I'm
> not used to.

What about

require 'English'
re = ARGV.shift
$DEFAULT_INPUT.each{|x| puts x if x =~ /#{re}/}

??

It's two lines if you use '$<'...

--
_ _
| |__ __ _| |_ ___ _ __ ___ __ _ _ __
| '_ \ / _` | __/ __| '_ ` _ \ / _` | '_ \
| |_) | (_| | |_\__ \ | | | | | (_| | | | |
|_.__/ \__,_|\__|___/_| |_| |_|\__,_|_| |_|
Running Debian GNU/Linux Sid (unstable)
batsman dot geo at yahoo dot com

Linux: because a PC is a terrible thing to waste
-- [email]ksh@cis.ufl.edu[/email] put this on Tshirts in '93

[Daniel Carrera]

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On Thu, Jul 10, 2003 at 02:47:16PM +0900, Mauricio Fernández wrote:

> What about
>
> require 'English'
> re = ARGV.shift
> $DEFAULT_INPUT.each{|x| puts x if x =~ /#{re}/}
>
> ??
>
> It's two lines if you use '$<'...

Did you see mine? It was one line! (with a semicolon though :)


- --
Daniel Carrera | OpenPGP fingerprint:
Graduate TA, Math Dept | 6643 8C8B 3522 66CB D16C D779 2FDD 7DAC 9AF7 7A88
UMD (301) 405-5137 | [url]http://www.math.umd.edu/~dcarrera/pgp.html[/url]
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[Daniel Carrera]

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On Thu, Jul 10, 2003 at 03:18:01PM +0900, Mauricio Fernández wrote:

> > Did you see mine? It was one line! (with a semicolon though :)

>
> They're the same if you omit the fact that I forgot about Enumerable#grep ;)
> It turns out that $<, $DEFAULT_INPUT _and_ ARGF are synonyms.

I didn't know that. I should have guessed.

> IMHO one semicolon is equivalent to one line-break but we can still make
> it a one-liner without cheating:
>
> re = ARGV.shift and puts ARGF.grep(/#{re}/)
>
> However, I don't quite like this example, it feels perlish.
> I'd rather show singleton methods at work, or blocks, or metaclasses...

Okay, so we agree on:

re = ARGV.shift;
ARGF.each{|x| puts x if x =~ /#{re}/}

It's Rubyish, and it avoids the perlishms like "$<" (akward variable names) and the "and".
A slight modification would be:

re = ARGV.shift;
puts ARGF.map{|x| x if x =~ /#{re}/}.compact


I'm not sure which one I like better.

- --
Daniel Carrera | OpenPGP fingerprint:
Graduate TA, Math Dept | 6643 8C8B 3522 66CB D16C D779 2FDD 7DAC 9AF7 7A88
UMD (301) 405-5137 | [url]http://www.math.umd.edu/~dcarrera/pgp.html[/url]
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[Brian Candler]

On Thu, Jul 10, 2003 at 07:35:51AM +0900, Austin King wrote:

> class RubyFan < OOProgrammer
> include OpenSource
> def initialize( name, talent )
> super( name, talent )
> # adjust for inherent Rubyness
> @productivity = CodeFu.MASTER * talent
> @stress_level = @stress_level / 2
> @street_cred = true;
> end
> end

Note that the semicolon isn't needed.

Regards,

Brian.

[Brian Candler]

On Thu, Jul 10, 2003 at 02:16:15PM +0900, Daniel Carrera wrote:

> Or could someone give me a link to PickAxe so I can look it up?

[url]http://www.rubycentral.com/book/[/url]

Or if you meant a specific reference for each_line, see
[url]http://www.rubycentral.com/book/ref_c_io.html#IO.each_line[/url]

[Brian Candler]

On Thu, Jul 10, 2003 at 02:27:07PM +0900, Daniel Carrera wrote:

> I just thought of a dead give-away:
>
> dcarrera ~ $ cat myfile
> cat
> dog
> horse
> zebra
> tiger
> dcarrera ~ $ grep a myfile
> cat
> zebra
> dcarrera ~ $ ruby -e 'puts ARGF.grep(/a/)' myfile
> cat
> zebra

Or you can use nasty perlisms:

$ ruby -ne 'print if /a/' myfile
cat
zebra

Personally I think $_ should be abolished :-)

Something that shows either the OO-nature of Ruby, or blocks/iterators in
action, has got to be a good thing.

Regards,

Brian.

[nobu.nokada@softhome.net]

Hi,

At Thu, 10 Jul 2003 15:26:14 +0900,
Daniel Carrera wrote:

> Okay, so we agree on:
>
> re = ARGV.shift;
> ARGF.each{|x| puts x if x =~ /#{re}/}
>
> It's Rubyish, and it avoids the perlishms like "$<" (akward variable names) and the "and".
> A slight modification would be:
>
> re = ARGV.shift;
> puts ARGF.map{|x| x if x =~ /#{re}/}.compact

They waits until all input end.

ARGF.grep(Regexp.new(ARGV.shift)) {|l| puts l}

or

ARGF.grep(Regexp.new(ARGV.shift), &method(:puts))

--
Nobu Nakada

[Josef 'Jupp' Schugt]

Saluton!

* gabriele renzi; 2003-07-10, 12:56 UTC:

> 5.times { puts 'ruby r0x!'}

puts ruby.rocks
true

Gis,

Josef 'Jupp' Schugt
--
N'attribuez jamais à la malice ce que l'incompétence explique !
-- Napoléon

[Orion Hunter]

What we need is a code snippet that is excessively long and obfuscate in
Perl, such as a single line of code which has to wrap around the t-shirt to
be completed (with all the @ and $ symbols, etc.), and then do the same in
Ruby underneath... which only takes a fraction of the width of the front
side of the shirt.

__________________________________________________ _______________
MSN 8 with e-mail virus protection service: 2 months FREE*
[url]http://join.msn.com/?page=features/virus[/url]

[Brian Candler]

On Thu, Jul 10, 2003 at 03:26:14PM +0900, Daniel Carrera wrote:

> Okay, so we agree on:
>
> re = ARGV.shift;
> ARGF.each{|x| puts x if x =~ /#{re}/}

Incidentally, you could make it more efficient by building the regex only
once:

re = /#{ARGV.shift}/
ARGF.each{|x| puts x if x =~ re}

Regards,

Brian.

[Xavier Noria]

On Thursday 10 July 2003 22:32, Orion Hunter wrote:

> What we need is a code snippet that is excessively long and obfuscate
> in Perl, such as a single line of code which has to wrap around the
> t-shirt to be completed (with all the @ and $ symbols, etc.), and
> then do the same in Ruby underneath... which only takes a fraction of
> the width of the front side of the shirt.

IMHO it will be almost impossible to do that, being fair and idiomatic
with the Perl version, writing readable Perl, and getting that ratio at
the same time.

Though I would be glad if I was proved wrong :-).

-- fxn