hello world in 99 languages

  • December 26, 2008 – 7:16 am
  • Posted in misc

a post in progress

The purpose of this post is to accumulate references / links to how to get started in 99 programming languages. The objective is a one-stop post that I can refer to in the future to remember how to set up a given programming language environment.

  • C or C++

    Ubuntu:

    apt-get install gcc
apt-get install build-essentials

if not working, then be sure to
apt-get update
first

    #include
int main()
{
  // this is a comment.
  printf("Hello, world") ;
  return 0 ;
}

  • php

    download it
    this was a good tutorial, but is since taken offline. basically the lines you need to add to httpd.conf are:

    # location of the .dll
LoadModule php5_module "C:/Program Files/Apache Software Foundation/Apache2.2/php/php5apache2_2.dll"

# location of the ini directory where php.ini sits
PHPIniDir "C:/Program Files (x86)/Apache Software Foundation/Apache2.2/php/"

# definition of the mime-type:  ADD to the  section:
<IfModule mime_module>
  AddType application/x-httpd-php .php
</IfModule>

    And that’s it. Other things I like to do to PHP.ini when first setting up are:

    • change error_reporting to E_ALL by setting error_reporting = E_ALL
    • turn on the $_ENV array by setting variables_order = "GPCES"

  • perl.

    Get it from activestate.
    you need to edit httpd.conf again to let apache know that anything accessed via a url like:

    http://localhost/cgi-bin/scriptname

    IS a script that needs to be executed/run, and NOT just some static html or image or content file that can be straight delivered.

    So you set up this “ScriptAlias” setting:

    
    # GENERAL FORMAT OF AN ALIAS:
    # Alias /webpath /full/filesystem/path

    # Example of an alias:
    Alias /special-docs C:\specialDocs\
    # above rule means that any requests for
    # http://localhost/special-docs/document.doc
    # would actually map down to a request on
    # the computer hard disk for
    # C:\specialDocs\document.doc
    # so, this ALIAS defines basically a second
    # document root, in a sense... a folder
    # from which apache will serve documents
    # out of OTHER THAN htdocs.

    # now, for a scriptalias:
    ScriptAlias /cgi-bin/ "C:/Program Files (x86)/Apache Software Foundation/Apache2.2/cgi-bin/"
    # this says anything accessed
    # via http://localhost/cgi-bin/WHATEVER.SCRIPT
    # should really be looked up as a SCRIPT TO RUN
    # that is stored on the hard disk at
    # C:/Program Files/Apache Software Foundation/Apache2.2/cgi-bin/WHATEVER.SCRIPT

    # So, you DON'T store perl scripts in htdocs!  You store them IN THE CGI-BIN
    # FOLDER AS DEFINED HERE.  It could be C:/cgi-bin.  Apache doesn't care.

    # Now, allow execution of CGI scripts
    # IN the directory you just specified.
    <Directory "C:/Program Files (x86)/Apache Software Foundation/Apache2.2/cgi-bin/">
      AllowOverride None
      Options +ExecCGI
      Order allow,deny
      Allow from all
    </Directory>

    # FINALLY, a handler
    AddHandler cgi-script .cgi .pl .py
    # so ALL these file extensions (.cgi, .pl or .py)
    # are handled as CGI scripts.

    BUT YOU AIN’T DONE YET!!

    If you try to run your perl scripts, you might see errors like:

    
[Fri Dec 26 13:32:15 2008] [error] [client xx.yy.80.55] (13)Permission denied: exec of '/var/cgi-bin/run.pl' failed
[Fri Dec 26 13:32:15 2008] [error] [client xx.yy.80.55] Premature end of script headers: run.pl

    Now, before you turn into this guy, go to /usr/lib/apache2/ and RENAME suexec to something like suexec.disabled. No time to explain, here’s why.

  • python. get it from python.org. More to come…

  • haskell

    try this

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