Renumber steps past Hello World??
- From: rem642b@xxxxxxxxx (Robert Maas, see http://tinyurl.com/uh3t)
- Date: Wed, 29 Jun 2005 18:48:59 -0700
Please take a look at:
http://www.rawbw.com/~rem/HelloPlus/hellos.html
Note that up to now I've lumped together the original Hello World
program, which was just a local display of a brief message, or even a
flashing light, with my own efforts to make sure such a program is
accessible from the Web via a regular URL (http://host/dir/name.html or
http://host/acct/cgi-bin/name.cgi etc.), and that the output is
directed back to the same browser that activated it, generating proper
HTTP header with mime type text/plain or text/html so that it can be
viewed by the remote user who invoked it. I also have, in each case, a
CGI script that displays a program source listing for all source and
indirection files involved, as well as directory listing for those and
any binaries which are generated by compiling the source, clearly
documenting what files are needed, where they should be located, and
what the file protection bits need to be. In summary, I'm not only
proving my own ability to generate Hello World programs in several
langauges, but I've created an online tutorial how anyone else could do
the same too. This is a lot more than what a novice programming student
typically writes as a first program. While just about every first-year
computer programming student writes a simple Hello World, hardly any
makes any effort to make the program accessible over the Web, nor sets
up a WebPage fully documenting the accomplished task.
But because I've lumped my online tutorials in the same category as
various collections of simple first-program Hello World examples, some
people have gotten the mistaken idea that I've done nothing worthwhile.
I think I have. For example none of the existing PHP tutorials I was
able to find mentionned that not only does the Hello.php file need to
be located somewhere in the tree below the public HTML directory, but
also a .htaccess file with appropriate content must be located at the
root of the HTML directory tree, and it must have group/other read
permission set. Because of the deficiency in the other people's
tutorials, I was unable to get a PHP working until a few days ago when
I asked somebody on a newsgroup who then told me part of the info in
one response then the next part in another response until I finally had
it working. Now my own documented example can serve as a tutorial for
anyone trying to do the same thing, and I *do* show clearly both the
PHP file and the .htaccess file, so that nobody following my example
would have the same trouble that I did. I think by providing full
examples of Hello World in various languages, I've done a service to
the programming students worldwide, at least any that happen upon my
examples file.
So given the wide difference between a simple hello-world program on a
single machine inaccessible and undocumented, and my remotely-runnable
and fully-documented examples, I'm thinking that there's already a step
beyond Hello World in what I've done. So maybe I should increase the
numbering by one on all my examples. The other people's simple
undocumented unrunnable examples would be isolated at level zero, and
my Hello World Online examples would be moved to "One step beyond Hello
World", and my present one-step-beyond-HW (output that varies by
time-of-day or IP-of-client/browser) would become "Two steps beyond
Hello World", and my present two-steps-beyond-HW (response to user's
request by simple sub-string matching) would become "Three steps beyond
Hello World", and my present three-steps-beyond-HW (fully decoded HTML
form into associative array with random access per key to obtain
associated value) would become "Four steps beyond Hello World", and my
upcoming four-or-more-steps-beyond-HW (language-independent exploration
of data types and common/useful data-processing methods, showing how
the same kind of data is similar and different in various programming
languages, and which common d/p methods are available in some languages
but not in others except if you program them yourself out of more
primitive operations, and setting up an interactive "pocket calculator"
that can handle not just numbers but all kinds of data types common in
today's high-level programming languages, whereby the user of my
calculator could write programs in a language-independent manner
without having to decide upon any particular programming language, and
then at some point could have their programs expressed in any language
that provides the particular services they are using) would become
"Five or more steps beyond Hello World".
In summary, the current:
Table of contents:
* The classic 'Hello World!' (always the same text output)
txt t/h html php sh* perl python lisp awk c c++ java (many more)
* One step beyond (non-static, output varies with time or IP number)
php sh* perl python lisp c c++ java
* Two steps beyond (responsive, output depends on user input)
html / php sh* awk lisp
* Three steps beyond (proper decoding of HTML-form contents, so that
program can be correctly responsive to user input)
lisp
* Four or more steps beyond (exploration of different types of data
available in various programming languages, and how to perform
common manipulations on such datatypes, contrasting how to do the
same operation on equivalent data using different programming
languages)
would be changed like this:
Table of contents:
* The classic 'Hello World!' (local machine, always the same text output)
ACM's collection / WikiPedia's / cuillin / wolfram / esoteric
* One step beyond (static output again, but live Web-accessible app'l)
txt t/h html php sh* perl python lisp awk c c++ java (many more)
* Two steps beyond (non-static, output varies with time or IP number)
php sh* perl python lisp c c++ java
* Three steps beyond (responsive, output depends on user input)
html / php sh* awk lisp
* Four steps beyond (proper decoding of HTML-form contents, so that
program can be correctly responsive to user input)
lisp
* Five or more steps beyond (exploration of different types of data
available in various programming languages, and how to perform
common manipulations on such datatypes, contrasting how to do the
same operation on equivalent data using different programming
languages)
So do you-all think that numbering change, to clearly separate my
online examples from the traditional just-starting examples would be a
good idea or not?
.
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