[perl-python] 20050117, filter, map

[Xah Lee]

© # -*- coding: utf-8 -*-
© # Python
©
© # the "filter" function can be used to
© # reduce a list such that unwanted
© # elements are removed.
© # example:
©
© def even(n): return n % 2 == 0
© print filter( even, range(11))
©
©
© # the "map" function applies a function
© # to all elements of a list. Example:
©
© def square(n): return n*n
© print map(square, range(11))
©
© ------------------------------------
© # similar perl versions
©
© use Data::Dumper;
© sub even {return $_[0]%2==0};
© print Dumper[ grep {even $_} (0..10)];
©
©
© # sub square {$n=shift;$n**2 ;};
© sub square {(shift)**2;};
© print Dumper [ map {square($_)} (0..10)];
©
© # the codes above showcase some syntax
© # variations commonly found in perl code
© # base
©
© -------------------------
©
© # in Mathematica for example, filter is
© # akin to Apply and map is MapThread.
© # The standard Map can be applied
© # according to a level spec of trees
© # and there's also MapAt, Nest,
© # NestList...any many more powerful
© # functions that manipulates trees.
© # lisp languages often have a subset
© # of it.
©
© ----------------------------
© Note: this post is from the Perl-Python
© a-day mailing list at
© http://groups.yahoo.com/group/perl-python/
© to subscribe, send an email to
© perl-python-subscribe@yahoo groups.com if
© you are reading it on a web page,
© program examples may not run because
© html conversion often breaks the code.
©
© Xah
© xah@xahlee.org
© http://xahlee.org/PageTwo_dir/more.html

[Steven Bethard]

Re: [perl-python] 20050117, filter, map

Xah Lee wrote:[color=blue]
> © Note: this post is from the Perl-Python
> © a-day mailing list at
> © http://groups.yahoo.com/group/perl-python/[/color]

Is there any chance you could post these all as part of the same thread?
That would be really nice for those of us who aren't interested --
then we could just ignore the thread...

Thanks in advance,

Steve

[Erik Max Francis]

Re: [perl-python] 20050117, filter, map

Steven Bethard wrote:
[color=blue]
> Is there any chance you could post these all as part of the same thread?
> That would be really nice for those of us who aren't interested --
> then we could just ignore the thread...[/color]

Or, better yet, not posting it at all. He's got his mailing list, what
does he need to post it here for?

--
Erik Max Francis && max@alcyone.com && http://www.alcyone.com/max/
San Jose, CA, USA && 37 20 N 121 53 W && AIM erikmaxfrancis
Make it come down / Like molasses rain
-- Sandra St. Victor

[Steve Holden]

Re: [perl-python] 20050117, filter, map

Erik Max Francis wrote:
[color=blue]
> Steven Bethard wrote:
>[color=green]
>> Is there any chance you could post these all as part of the same
>> thread? That would be really nice for those of us who aren't
>> interested -- then we could just ignore the thread...[/color]
>[/color]
You are looking for evidence of cluefulness where it seems unlikely to
ever appear.[color=blue]
>
> Or, better yet, not posting it at all. He's got his mailing list, what
> does he need to post it here for?
>[/color]
As I may have mentioned before, egotism can be the only possible reason.

regards
Steve
--
Steve Holden http://www.holdenweb.com/
Python Web Programming http://pydish.holdenweb.com/
Holden Web LLC +1 703 861 4237 +1 800 494 3119

[Nick Coghlan]

Re: [perl-python] 20050117, filter, map

Steve Holden wrote:[color=blue]
> As I may have mentioned before, egotism can be the only possible reason.[/color]

I'd merely figured it as a textbook case of trolling - attention seeking
behaviour, most likely indicative of a lack of self-esteem, rather than the reverse.

Still, he does at least keep the [perl-python] mailing list tag, so automatic
filtering isn't that difficult. It is an unfortunate shame that his
consideration doesn't extend to removing the general Perl and Python discussion
groups from his recipients list.

Cheers,
Nick.

--
Nick Coghlan | ncoghlan@email. com | Brisbane, Australia
---------------------------------------------------------------

http://boredomandlaziness.skystorm.net

[Martin Kissner]

Re: [perl-python] 20050117, filter, map

Steven Bethard wrote :[color=blue]
> Xah Lee wrote:[color=green]
>> © Note: this post is from the Perl-Python
>> © a-day mailing list at
>> © http://groups.yahoo.com/group/perl-python/[/color]
>
> Is there any chance you could post these all as part of the same thread?
> That would be really nice for those of us who aren't interested --
> then we could just ignore the thread...[/color]

I would appreciate that, too.
But I fear this person doesn't even read the comments on his unwanted
load.

I guess I'll scorefile the "Subject" of these postings, too, to get rid of
this.


--
Epur Si Muove (Gallileo Gallilei)

[Xah Lee]

Re: [perl-python] 20050117, filter, map

erratum:

the Mathematica Apply should've been Select.
....

Xah
xah@xahlee.org

http://xahlee.org/PageTwo_dir/more.html

[Xah Lee]

Re: [perl-python] 20050117, filter, map

erratum:

the Mathematica Apply should've been Select.
....

Xah
xah@xahlee.org

http://xahlee.org/PageTwo_dir/more.html

[Abigail]

Re: [perl-python] 20050117, filter, map

Steven Bethard (steven.bethard @gmail.com) wrote on MMMMCLVII September
MCMXCIII in <URL:news:iI6dn V_4Dafh0nbcRVn-gg@comcast.com> :
$$ Xah Lee wrote:
$$ > © Note: this post is from the Perl-Python
$$ > © a-day mailing list at
$$ > © http://groups.yahoo.com/group/perl-python/
$$
$$ Is there any chance you could post these all as part of the same thread?


Just killfile him, and stop replying. Remember, don't feed the trolls.



Abigail
--
my $qr = qr/^.+?(;).+?\1|;J ust another Perl Hacker;|;.+$/;
$qr =~ s/$qr//g;
print $qr, "\n";

[Charlton Wilbur]

Re: [perl-python] 20050117, filter, map

>>>>> "SH" == Steve Holden <steve@holdenwe b.com> writes:

SH> As I may have mentioned before, egotism can be the only
SH> possible reason.

Relevant links:

"On Ignoring Trolls":

http://www.xahlee.org/UnixResource_dir/writ/troll_ignorance.html

"A Troll's Anthology":

http://www.xahlee.org/UnixResource_dir/writ/troll_anthology.html

He admits to being a troll, and he enjoys trolling. I suspect this
thread was intended to stir up a flame war among Perl and Python
users; all it's done is demonstrate how hopeless Xah is as a
programmer even in a language he claims to be an expert in.

Charlton



--
cwilbur at chromatico dot net
cwilbur at mac dot com

[Jürgen Exner]

Re: [perl-python] 20050117, filter, map

Abigail wrote:[color=blue]
> Steven Bethard (steven.bethard @gmail.com) wrote on MMMMCLVII September
> $$ Is there any chance you could post these all as part of the same
> thread?
>
> Just killfile him, and stop replying. Remember, don't feed the trolls.[/color]

True, except that he spreads lies about Perl and really bad code all over
the place.
If you don't tell people about how awful his skills are then they may
actually mistake his incompetency for flaws in Perl.

jue

[Tad McClellan]

Re: [perl-python] 20050117, filter, map

Erik Max Francis <max@alcyone.co m> wrote:[color=blue]
> Steven Bethard wrote:
>[color=green]
>> Is there any chance you could post these all as part of the same thread?
>> That would be really nice for those of us who aren't interested --
>> then we could just ignore the thread...[/color]
>
> Or, better yet, not posting it at all. He's got his mailing list, what
> does he need to post it here for?[/color]


There isn't much point in trolling if you don't have an audience.


--
Tad McClellan SGML consulting
tadmc@augustmai l.com Perl programming
Fort Worth, Texas