Daysleeper

there are two approaches of mutlithreaded programming

For me, In any long running server app, there are only two rules of multithreaded programming:

• I don’t do it.


• I do 200% solid, multithreaded programming with proper test cases, unit tests and simulators to weed out all the race conditions. If i don’t do the above, its gonna suck. Its not a FPS game, that I would expect my users to simply restart.

delete a file and save it in Trash

Here is a quick hackish shell script that serves as an replacement of rm command. It works on directories and files as well.

And the good thing is, when you delete your files/directories it saves it in a folder called trash and if there are duplicate stuff..then gives version to them.

#!/bin/bash
trash=$HOME"/trash"
if [ ! -n "$1" ]
    then
    echo "****** Invalid Arguments *******"
    echo "Usage: delete file/folder."
    exit 0
fi
for arg in "$@"
  do
  if [ ! -e $arg ]
      then
      continue
  fi
  file="$trash""/$arg"
  i=0
  i=`expr $i + 1`
  while true
    do
    if [ -e $file ]
    then
    file=$trash"/"$arg
    file=$file$i
    else
    mv $arg $file
      exit 0
    fi
    i=`expr $i + 1`
  done
done

Drawbacks: doesn’t work on delete style of:
del /var/www/most_important_project_evet

Get rid of those .svn directories

Well, sometimes…you need a quick script to get rid of all those .svn files in your project tree. Here is a quick hack for that. Any drawbacks?

for x in `find.|egrep '\.svn'`
do
  rm -rf "$x"
done

Where are my Programmer's manual?

Well, Ubuntu doesn’t comes bundled with Programmer’s manual pages unlike Fedora that I have used for my lifetime.

Turned out, it was really easy stuff:

#apt-cache search manpages-dev

There goes all the wise words of giants, on whose shoulders we stand.

Metaprogramming

There are programmers and there are meta programmers, I am trying hard to become one.

Some links that may help you out:

Art of Metaprogramming Part-1

Art of Metaprogramming Part2

Uproar on Switching to Ubuntu from Mac OSX

There has been some uproar, when some famous geeks dumped Mac in favour of Ubuntu.I liked the reasoning given by this guy.read on

What's really happening is that Mac "nerds" are becoming versed enough in Unixisms because of OS X that they can take a walk on the wild side with Linux and not get completely freaked out. They have just enough street smarts to take a walk through the OS inner city with the tough nerds, and not get shot or beat up. And they've discovered that, hey, wow there's a lot of cool shit happening on the mean streets of Linuxville.

But what they don't know is that downtown Linuxville hasn't been a rough a place for a few years now. It still clings to its tough reputation, but it's all college kids and coffee bars now. The place is gentrifying, and has a bit of that yuppie stench to it these days. It's not yet all Wonderbread and Wal-mart, like Windowsland, up the highway, but the Windowsland folks are moving in, and it's starting to get that feel.

The old-timers who gave Linux the frightening reputation that it carries, have long since settled down, had kids, and moved out to the leafy lanes and plush lawns of Mactown, to get away from the plastic Windowsland people. As a result, the Mactown folks have realized those Linux guys aren't so scary after all, beards and sandles notwithstanding. Maybe, some of the Mactown folks think, we could get a condo in Linuxville, and try some of that inner city living. Just on weekends for a start.

So they get a luxury condo in Linuxville, right on Ubuntu Street, which was built by a big-name property developer who saw that all the starving artists were living in the area, building cool lofts and studios from the abandoned tenements and factories of old Unixville. So he bottled up that artsy mojo and built a condo development with new appliances, and hardwood floors, and put in a Starbucks on the ground floor, and marketed it heavily to Mactown and Windowsland people looking for a change. Come to Linuxville! Not as scary as you think! But every bit as edgy! Now with taskbars! Sometimes you get contemptuous looks from the mean looking men who still hang out on Slackware Road, but it's best not to go down there if you can help it. If you can avoid them (and ignore the snotty punks on Gentoo Avenue), then it's all terrifically edgy and artsy, and just so-o-o-o nerdy cool in that certain je-ne-sais-quoi kind of way. It feels like they're right on the cutting edge, where the culture is created, where everything happens, just like they read in Wired Magazine in 1996.