/writ/jargons.html
Xah
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are usually treated as a special method at the
language level, its concept and linguistic issues is a OOP machinery
complexity, while the Accessor concept is a OOP engineering complexity.
-
to be continued tomorrow.
This is part of an installment of the article
“What are OOP's Jargons and
ment of the article
“What are OOP's Jargons and Complexities”
by Xah Lee, 20050128. The full text is at
http://xahlee.org/Periodic_dosage_dir/t2/oop.html
© Copyright 2005 by Xah Lee. Verbatim duplication of the complete
article for non-profit purposes is granted.
The article is publish
argons and Complexities”
by Xah Lee, 20050128. The full text is at
http://xahlee.org/Periodic_dosage_dir/t2/oop.html
© Copyright 2005 by Xah Lee. Verbatim duplication of the complete
article for non-profit purposes is granted.
The article is published in the following newsgroups:
comp.lang.c,c
along
with its 40 or so methods and other things.
http://java.sun.com/j2se/1.4.2/docs/api/java/io/File.html (local copy)
---
to be continued...
This is part of an installment of the article
“What are OOP's Jargons and Complexities”
by Xah Lee, 20050128. The full text is at
http://xahle
sions archived here:
http://xahlee.org/tree/tree.html
Xah
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Dear functional programers,
i run services called a-python-a-day and a-java-a-day, where each day i
give a tip or snippet of code in these languages, also as a way for me
to learn these languages
approved by Wolfram Research Incorporated.)
The first argument of Table function in Mathematica (mma) is a
expression. Most other languages cannot have such symbolic expressions.
In Perl, a string is choosen instead as the experssion, and it is being
evalutade later as code. This may not be a practical choice but anyway
it's just a exercise. Each other language should choose appropriate
design for this emulation...
Perl, Python, Java solutions will be posted by me in the coming days.
Xah
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if i have
mytext.replace(a,b)
how to find out many many occurances has been replaced?
Xah
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l in processing tree structures, such as XML and many other things
spurn from it today.
Disclaimer: this project is not affiliated with Wolfram Research Inc.
Xah
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how can i define a function with variable parameters? For example,
f(a) would return [a]
f(a,b) would return [a,b]
f(a,b,...) would return [a,b,...]
One solution is of course to make the argument as a list. i.e.
f([a,b,...])
but are there other solutions?
Xah
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∑ http
e.org/perl-python/re-write_notes.html
Xah
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i wanted to find out if Python supports eval. e.g.
somecode='3+4'
print eval(somecode) # prints 7
in the 14 hundred pages of python doc, where am i supposed to find this
info?
Xah
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Apparently i tried it before posting
eval '3'
and got misleading errors because i forgot the parenthesis...
This is a easy one to find in the doc...
The unhelpful doc organization and past experiences confounded this
case.
Thanks.
Xah
[EMAIL PROTECTED]
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dustry
geeking moron's need to computer-sciency speak with implementation
infatuation. And in part it came to that really because they are
comparative morons.
for a more sincere, detailed account, please see:
http://xahlee.org/perl-python/re-write_notes.html
Thanks.
Xah
[EMAIL PROTEC
[this post is a excerpt from
The Modernization of Emacs, Xah Lee, 2006-04 at
http://xahlee.org/emacs/modernization.html
]
The Modernization of Emacs
THE PROBLEM
Emacs is a great editor. It is perhaps the most powerful and most
versatile text editor. And
emacs palpable to the vast number of
people who ever need to use a computer to write.
Xah
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e design issues into popularity
vs elegance.
Xah
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it is openly
questionable that emacs's ways of operation induced by its default
user interface allows faster or more efficient operation than a user
interface based on modern software conventions.
Xah
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the
menus), [T] (for Transfer), [L] (for Load). Suppose Microsoft hired a
third party to release a variant called MS AquaWord. This would not
help Microsoft Word the software itself, and is likely to complicate
the issue around Microsoft Word.
Xah
[EMAIL PROTECTED]
∑ http://xahlee.
" name is a major point
of confusion for getting people to learn Emacs. The abbreviation C-
and M- to represent keyboard shortcuts should similarly be
updated to the more easy-to-understand and universal Ctrl- and
Alt-.
Xah
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reciate other examples you know in the above languages, and
or in particular if Java, Lisp, Haskell.
This article is a modified excerpt from
“Linden Scripting Language Problems” at
http://xahlee.org/sl/ls-prob.html
Xah
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age design book or latest computer
engineering practice guide or forum argumentation or wiki or Open
Sourcing zeitgeist fuck, to read a text book or learn on the above
topics.
Xah
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Xah Lee wrote:
«
...
“Ignorance And Intolerance In Online Computing Communities”
http://xahlee.org/Netiquette_dir/ignorance_intolerance.html
... As i have indicated in my post, it is non-trivial to implement a
function that returns the positive angle of a vector
»
I have now coded this. I
ar as i know, does not exist in some
other high-level functional programing languages such as Haskell. I'm
not familiar with many functional languages except Lisp and
Mathematica. I'm curious, as to how Haskell, which itself is quite
with capable of symbolic computation i think, deals with
The Concepts and Confusions of Prefix, Infix, Postfix and Fully
Functional Notations
Xah Lee, 2006-03-15
[This articles explains away the confusion of common terms for
notation systems used in computer languages: prefix, infix, postfix,
algebraic, functional. These notation's relation t
ble Perl both in theory AND in practice. (in lisp, its power of
syntax variation comes in the guise of macros.) And, more importantly,
Perlers clamor about Perl's “expressiveness” more or less on the
syntax level but don't realize that semantic expressibility is far
more important.
Xah
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Why Emacs's Keyboard Shortcuts Are Painful
Xah Lee, 2007-07
A important aspect in designing keyboard shortcuts is to have keyboard
shortcuts for those most frequently used commands, and, the most
frequently used commands should have most easily-pressed keystrokes.
For example, they should
The following article a extended version of previous post.
A HTML version can be found at
http://xahlee.org/emacs/emacs_kb_shortcuts_pain.html
---
WHY EMACS'S KEYBOARD SHORTCUTS ARE PAINFUL
Xah Lee, 2007-07
A important aspect in designing a keyboard shortcu
e needs extra revision
control, a more proper mechanism, one that people actually use, is to
revert to the saved version.
Xah
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out further ado, the article is at:
“Under the spell of Leibniz's dream” (2000) By Edsger W Dijkstra
http://www.cs.utexas.edu/~EWD/ewd12xx/EWD1298.PDF
Xah
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ity of math PHD holders in this world today,
do not have sufficient knowledge about the subject to appreciate what
i wrote.
Xah
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sorting a matrix (i.e. list of lists) is rather common. With
this function, i can have a single interface to deal with any list
(including list of lists).
It is ideal, that a language's function for sort actually are of this
generality.
(See “What is Expressiveness in a Computer Language”, Xah Lee,
hi, just a quick reply.
You are right, the python version i have is really terrible.
I'll look at your solution and possibly reply later.
Thanks for your code. It's great!
Xah
On Aug 29, 9:40 am, Marc 'BlackJack' Rintsch <[EMAIL PROTECTED]> wrote:
> On We
I can of course write a loop then for each string use
"encode("utf-8")", but is there a easier way?
Thx.
Xah
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On Sep 10, 8:12 am, Carsten Haese <[EMAIL PROTECTED]> wrote:
Xah Lee wrote:
If i have a nested list, where the atoms are unicode strings, e.g.
# -*- coding: utf-8 -*-
ttt=[[u"→",u"↑"], [u"αβγ"],...]
print ttt
how can i print it without getting the u'\u
Google groups seems to be stripping my quotation markslately.
Here's a retry to post my previous message.
------
Xah Lee wrote:
If i have a nested list, where the atoms are unicode strings, e.g.
# -*- coding: utf-8 -*-
tt
uot; / Encoding
http://xahlee.org/perl-python/charset_encoding.html
Xah
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ttp://xahlee.org/perl-python/unicodedata_module.html
・ Emacs and Unicode Tips
http://xahlee.org/emacs/emacs_n_unicode.html
・ Java Tutorial: Unicode in Java
http://xahlee.org/java-a-day/unicode_in_java.html
・ Character Sets and Encoding in HTML
http://xahlee.org/js/html_chars.html
Xah
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for some reason message posted thru google groups service since the
past week or so are stripping off the unicode chars double angle
brackets (U+00AB and U+00BB). For that reason, in this msg i've also
used double curly quotes "" whenever i have double angle brackets.
Xah
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On Sep 11, Xah Lee wrote:
i was browsinghttp://en.wikipedia.org/wiki/Comparison_of_computer_shells
quite fucking ridiculous that it contains Python shell and Ruby shell,
and, there's no mentioning of scsh.
Fuck the schemer morons.
someone please add scsh there.
--
2007-
On Java's Interface
Xah Lee, 20050223
In Java the language, there's this a keyword “interface”.
In a functional language, a function can be specified by its name and
parameter specs. For example:
f(3)
f(3, [9,2])
f("some string")
are usage examples of 3 functions all havin
What are OOP's Jargons and Complexities
Xah Lee, 20050128
Classes, Methods, Objects
In computer languages, often a function definition looks like this:
subroutine f (x1, x2, ...) {
variables ...
do this or that
}
In advanced languages such as LISP family, it is not uncommon to
d
REQUIREMENTS FOR A VISUALIZATION SOFTWARE SYSTEM FOR 2010
Xah Lee, 2007-03-16
In this essay, i give a list of requirements that i think is necessary
for a software system for creating scientific visualization for the
next decade (2007-2017).
(for a HTML version with images, please see
http
Laziness, Perl, and Larry Wall
Xah Lee, 20021124
In the unix community there's quite a large confusion and wishful
thinking about the word laziness. In this post, i'd like to make some
clarifications.
American Heritage Dictionary third edition defines laziness as:
“Resistant to work o
the community is in fact very tolerant in general (which is
to Larry's credit), when compared to the motherfucking Pythoners (who
knew SHIT) as well as many of the self-appointed lisp bigwig
characters.
[disclaimer: my statement about Larry Wall is opinion only.]
With Knowledge, and, Love.
politics, mutual sneering, closed-
mindedness, and careless postings.
References:
“Tech Geekers versus Spammers”
http://xahlee.org/UnixResource_dir/writ/tech_geekers_vs_spammers.html
Netiquette Guidelines, 1995, by S Hambridge. (RFC 1855)
http://tools.ietf.org/html/rfc1855
Xah
[EMAIL PROTECT
Elisp Tutorial: HTML Syntax Coloring Code Block
Xah Lee, 2007-10
This page shows a example of writing a emacs lisp function that
process a block of text to syntax color it by HTML tags. If you don't
know elisp, first take a gander at Emacs Lisp Basics.
HTML version with color and links
bout math? Then, he went on about HIS personal fucking zeal for
physics, in particular injecting the highly quacky “quantum mechanics”
with impunity.
Xah
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king
asses and holes.
Xah
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http://xahlee.org/
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Text Processing with Emacs Lisp
Xah Lee, 2007-10-29
This page gives a outline of how to use emacs lisp to do text
processing, using a specific real-world problem as example. If you
don't know elisp, first take a gander at Emacs Lisp Basics.
HTML version with links and colors is at:
no reason for Perl to be not capable of satisfying this
requirement, but currently Perl needs improvement in this regard.
»
Xah
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Xah Lee wrote in 2006-12-22:
> Of Interest:
>
> Introduction to 3D Graphics Programing
> http://xahlee.org/3d/index.html
Folks, i have expanded my tutorial to several pages in the past nearly
two months, and thank you very much for those who have given
encouragement.
I had plans to
ectly.
I was a technical writer and would not have been able to get away with
that level of quality.
yours truly
<>
------
Xah
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welcome.
Xah
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∑ http://xahlee.org/
# -*- coding: utf-8 -*-
# Python
# © 2006-04 by Xah Lee, ∑ http://xahlee.org/, 2006-04
# Given a webite gallery of photos with hundreds of photos, i want to
generate a thumbnail page so that viewers can get a bird's eye's v
The Python code is archived at:
http://xahlee.org/perl-python/tn_gen.html
Xah
[EMAIL PROTECTED]
∑ http://xahlee.org/
Xah Lee wrote:
> The following is a program to generate thumbnail images for a website.
> Useful, if you want to do that.
>
> It is used to generate the thumb
Criticism versus Constructive Criticism
Xah Lee, 2003-01
A lot intelligent people are rather confused about criticism,
especially in our “free-speech” free-for-all internet age. When
they say “constructive criticisms are welcome” they mostly mean
“bitching and complaints not welcome”. Rarely do
Dear John Bokma,
This is a public notice that what you are trying to do is getting close
to harrassment from the law's perspective.
Thanks.
Xah
[EMAIL PROTECTED]
∑ http://xahlee.org/
John Bokma wrote:
> Eli Gottlieb <[EMAIL PROTECTED]> wrote:
>
> > Oh, God, not a
What Languages to Hate
Xah Lee, 20020718
Dear lisp comrades and other concerned parties,
First, all languages have equal rights. Do not belittle other languages
just because YOUR favorite language is a bit better in this aspect or
that. Different people have different ideas and manners of
Addendum:
Recently I ran into this egregious propaganda:
http://www.ibiblio.org/pub/multimedia/video/obp/IntroducingPython.mpg
folks, take a look. This is a significant part how things move in the
computing community.
Xah
[EMAIL PROTECTED]
∑ http://xahlee.org/
Xah Lee wrote:
> W
Python, Lambda, and Guido van Rossum
Xah Lee, 2006-05-05
In this post, i'd like to deconstruct one of Guido's recent blog about
lambda in Python.
In Guido's blog written in 2006-02-10 at
http://www.artima.com/weblogs/viewpost.jsp?thread=147358
is first of all, the title “Languag
nd other algorithmic mathematical art, please let me know!
Xah
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Tabs versus Spaces in Source Code
Xah Lee, 2006-05-13
In coding a computer program, there's often the choices of tabs or
spaces for code indentation. There is a large amount of confusion about
which is better. It has become what's known as “religious war” —
a heated fight over trivi
issue. SLIME doesn't
cut it, either, as beautiful as SLIME is. Can't use it on Windows to
save your life, for instance. But that's one of a thousand problems
with the Lisp IDE situation; it's pointless to try to discuss them all
in blogger. It's probably pointless to discuss them at all, because
it's just going to make me more miserable that no decent IDE exists for
Lisp, except for Emacs-as-Elisp-IDE. Which is why I get my Lisp fix by
hacking elisp these days.
This post is archived at:
http://steve-yegge.blogspot.com/2006/04/software-needs-philosophers.html
and
http://xahlee.org/Periodic_dosage_dir/_p/software_phil.html
This essay is reported with permission.
Xah
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o replace all spaces to tabs. But
also, many unix languages contains a so-called construct of
“heredoc” as a mean to embed a literal block of text. For example,
here's a PHP construct of heredoc:
$novelText = <<http://xahlee.org/
Xah Lee wrote:
> Tabs versus Spaces in Source Code
>
ml
If you believe this lobbying to my webhosting provider is unjust,
please write to my web hosting provider [EMAIL PROTECTED]
Your help is appreciated. Thank you.
Xah
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source_dir/writ/lisp_problems.html
For more detail on the nested syntax problem for function chaining,
see
the section “How Purely Nested Notation Limits The Language's Utility”
at:
• The Concepts and Confusions of Prefix, Infix, Postfix and Fully
Nested Notations
http://xahlee.org/UnixResource_dir/writ/notations.html
Xah
∑ http://xahlee.org/
☄
--
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On Jan 17, 9:16 am, Xah Lee wrote:
> Here's a interesting toy problem posted by Drew Krause to
> comp.lang.lisp:
> ...
The code in my previous elisp code got a bump. It should be:
(defun read-lines (file)
"Return a list of lines in FILE."
(with-temp-buffer
(i
On Jan 17, 9:34 am, Xah Lee wrote:
> The code in my previous elisp code got a bump. It should be:
> ...
> • A Ruby Illustration of Lisp Problems
> http://xahlee.org/UnixResource_dir/writ/lisp_problems_by_ruby.html
Sorry again. More correction:
(defun read-lines (file)
"Retur
Xah Lee wrote:
> • A Ruby Illustration of Lisp Problems
> http://xahlee.org/UnixResource_dir/writ/lisp_problems_by_ruby.html
On Jan 17, 12:30 pm, André Thieme wrote:
> In the Lisp style Clojure for example one does exactly the same as
> Jillian James (JJ) did in Ruby:
> (m
hars. The
issue is about the irregularities in lisp's syntax damaged its power
of its otherwise believed superior regular syntax.
• Fundamental Problems of Lisp
http://xahlee.org/UnixResource_dir/writ/lisp_problems.html
Xah
∑ http://xahlee.org/
☄
--
http://mail.python.org/mailman/listinfo/python-list
http://xahlee.org/perl-python/list_comprehension.html
• Lambda in Python 3000
http://xahlee.org/perl-python/python_3000.html
Xah
∑ http://xahlee.org/
☄
--
http://mail.python.org/mailman/listinfo/python-list
but I can't seem to find anything on
> the sending to and capturing from an external program.
>
> Any suggestions would be greatly appreciated.
See:
• Making System Calls in Perl and Python
http://xahlee.org/perl-python/system_calls.html
Xah
∑ http://xahlee.org/
☄
--
http://m
On Jan 19, 4:49 pm, "Rhodri James"
wrote:
> On Sun, 18 Jan 2009 08:31:15 -, Xah Lee wrote:
> > On Jan 17, 10:25 am, Tino Wildenhain wrote:
> >> > [[int(x) for x in line.split()] for line in open("blob.txt")]
>
> > Nice (python code).
>
&
On Jan 19, 11:17 pm, alex23 wrote:
...
Hi Daniel Weinreb,
Xah wrote:
> • A Ruby Illustration of Lisp Problems
> http://xahlee.org/UnixResource_dir/writ/lisp_problems_by_ruby.html
Daniel Weinreb wrote:
> Xah Lee: Elisp is an interesting choice. But without converting the
> strings
Xah Lee wrote:
> > consider code produced by corporations, as opposed to with respect to
> > some academic or philsophical logical analysis. Looked in another way,
> > consider if we can compile stat of all existing pyhton code used in
> > real world, you'll find t
tation/plane_geometry_notation.html
• The Concepts and Confusions of Prefix, Infix, Postfix and Fully
Nested Notations
http://xahlee.org/UnixResource_dir/writ/notations.html
of course, i also have very technical and practical book length
tutorials on emacs lisp, python, perl, java, javascript/ht
de.
Also, one's demeanor must commensurate one's knowledge. If i pamper
you, you might think i'm a whimp, and run on with your opinions and
thoughts unbridled, which, can be considered as a miscommunication on
my part.
Xah
∑ http://xahlee.org/
☄
--
http://mail.python.org/mailman/listinfo/python-list
Rhodri James wrote:
> *plonk*
Please see:
• Killfile Considered Harmful
http://xahlee.org/UnixResource_dir/writ/kill_file_harmful.html
plain text version follows
---
Killfile Considered Harmful
Xah Lee, 2000-02-26
In newsgroups, killfile is a playful word mean
it. See:
• Is Lisp's Objects Concept Necessary?
http://xahlee.org/emacs/lisps_objects.html
• The Concepts and Confusions of Prefix, Infix, Postfix and Fully
Nested Notations
http://xahlee.org/UnixResource_dir/writ/notations.html
)
btw, anyone know the source of that Dijkstra
monad! Simple intro to
monad! Fucking morons, but MONAD!
PS i started a Ocaml learning blog here:
http://xah-ocaml.blogspot.com/
Xah
∑ http://xahlee.org/
☄
--
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For those of you using emacs, here's the elisp code that allows you to
syntax color computer language source code in your blog or website.
http://xahlee.org/emacs/elisp_htmlize.html
to comment, here:
http://xahlee.blogspot.com/2009/01/dehtmlize-source-code-in-emacs-lisp.html
Xah
∑
Language, Purity, Cult, and Deception
Xah Lee, 2009-01-24
[this essay is roughly a 10 years personal retrospect of some
languages, in particular Scheme and Haskell.]
I learned far more Ocaml in the past 2 days than the fucking 2 months
i tried to learn Haskell, with 10 years of “I WANT TO
nixResource_dir/writ/lang_purity_cult_deception.html
http://xahlee.blogspot.com/2009/01/language-purity-cult-and-deception.html
Xah
∑ http://xahlee.org/
☄
--
http://mail.python.org/mailman/listinfo/python-list
s.caltech.edu/courses/cs134/cs134b/book.pdf
Thanks. Am still reading your chapter 1 yet. Will check those out
later.
Xah
∑ http://xahlee.org/
☄
On Jan 23, 4:36 pm, Jon Harrop wrote:
> Xah Lee wrote:
> > ok, i've been reading these Ocaml tutorials in the past few days:
>
>
Function Application is not Currying
Xah Lee, 2009-01-28
In Jon Harrop's book Ocaml for Scientist at
http://www.ffconsultancy.com/products/ocaml_for_scientists/chapter1.html
It says:
Currying
A curried function is a function which returns a function as its
result.
LOL. Th
looking at the eXtreme Programing fuckheads's traffic history:
http://groups.google.com/group/comp.software.extreme-programming/about
for those who are not aware, it was one of the snake oil wildly
popular in around 2001.
Xah
∑ http://xahlee.org/
☄
Jason wrote:
I just started reading O
Xah Lee wrote:
> ...
> if you want software engineering books, i suggest try some books that
> are based on statistical survey, as opposed to some dignitary's
> “opinion” or current fashion & trends that comes with a jargon. These
> type of books are a dime a dozen, ever
the source code. (e.g. much of MathML, and
conversely Microsoft Word with its XML file format)
Xah
∑ http://xahlee.org/
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On Feb 12, 7:28 am, Xah Lee wrote:
> lisp machine keyboards.
>
> • Knite keyboard. I think this is one of the
> earlist.http://world.std.com/~jdostale/kbd/Knight.html
>
> • Symbolics earlier style keyboard (PN 364000), by Peter
> Painehttp://www.asl.dsl.pipex.com/sy
x27;ll be so in the next couple of years.
(btw, for those perlers who wishes to learn Python, see a comparative
tutorial:
• Xah's Perl and Python Tutorial
http://xahlee.org/perl-python/index.html
)
Xah
∑ http://xahlee.org/
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for so long? If it is a social problem, i don't imagine they
would last so long. It must be some technical issue?
Could any compiler expert give some explanation?
Thanks.
Xah
∑ http://xahlee.org/
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heart is something
like a hashtable... namely,
put ‹identifier 1› table
put ‹identifier 2› table
and lookup is just
retrieve ‹identifier› table
and now suppose we introduced namespace, so i imagine the compiler
simply just concat namespace component befor put, and split before
retrieve?
nked. You'll
get a survey of today's languages, what they are, what they do, their
nature, their field, and where the landscape of languages might be
tomorrow.
plain text version follows.
---
Back to Computing and Its People.
Proliferation of Computing Language
Xah Lee wrote:
> > i cannot fathom what could possibly be difficult of
> > introducing or implementing a namespace mechanism into a language. I
> > do not understand, why so many languages that lacks so much needed
> > namespace for so long? If it is a social probl
eneral,
backward compatibility does not fully answer the question of the no
namespace problem. Even if it does, the detail or reason is not given
in the above and is not something obvious at least to me.
Xah
∑ http://xahlee.org/
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Xah Lee wrote:
> i cannot fathom what could possibly be difficult of
> introducing or implementing a namespace mechanism into a language.
Joshua Cranmer wrote:
>> Namespaces go to the very core of a language, name resolution.
>> Retroactively adding such a feature is extremely
dumb and blind can
all still lead a happy and fruitful life.
There is no crisis!
Xah
∑ http://xahlee.org/
☄
On Nov 26, 1:32 pm, Kaz Kylheku <[EMAIL PROTECTED]> wrote:
> On 2008-11-26, Xah Lee <[EMAIL PROTECTED]> wrote:
>
>
>
> > comp.lang.lisp,comp.lang.functional,comp.la
On Nov 26, 4:57 pm, Kaz Kylheku <[EMAIL PROTECTED]> wrote:
> On 2008-11-26, Xah Lee <[EMAIL PROTECTED]> wrote:
>
> > Can you see, how you latched your personal beef about anti software
> > crisis philosophy into this no namespace thread?
>
> I did no such thi
Great to see quality post from real expert once in a while. Thanks!
Xah
∑ http://xahlee.org/
☄
On Nov 29, 9:03 am, Stephane CHAZELAS <[EMAIL PROTECTED]>
wrote:
> There's a common confusion in this in the nature of /bin/sh.
> There's no standard (neither POSIX nor Uni
athematica/analysis/content/ResearchLanguages.html
http://www.wolfram.com/products/mathematica/analysis/content/ScriptingLanguages.html
Note: I'm not affliated with Wolfram Research Inc.
Xah
∑ http://xahlee.org/
☄
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