Maiar's Vault

All you have to do is call int to change a string to a int my $someint = int($somestring);

Printing is very simple to the standard error sys.stderr.write('Printing to the stderr')

To get into vim insert mode Just type the letter i This will put you in insert mode when you are in command mode. By default your in command mode when you enter vim. To get into command mode just type the escape key ESC

Is actually a elif statement. Here is an example below python else if statement >>> x = int(raw_input("Please enter a number: ")) >>> if x ... x = 0 ... print 'Negative changed to zero' ... elif x == 0: ... print 'Zero' ... elif x == 1: ... print 'Single' ... else: ... print 'More'

python else if statement >>> x = int(raw_input("Please enter a number: ")) >>> if x ... x = 0 ... print 'Negative changed to zero' ... elif x == 0: ... print 'Zero' ... elif x == 1: ... print 'Single' ... else: ... print 'More'

vim how to highlight You can turn on syntax highlighting by typing: >:syntax enable

vim how to go to the end of file. Just type: > g Where is is meant to say you hold down the shift key while pressing g

vim how to quit. That's another easy one. Just type: >:q To quit without saving type: >:q! To save then quit type: >:wq

Vim how to save a file easy. Just type ESC key (this put you in command mode) If you open a file using something like vim SOMEFILENAME Then type >:w If it's a new file just type >:w SOMEFILENAME

All you need to do is type the vim command :edit or you can use the shortcut :e will open the file for editing.

Just use my web page that I setup to escape single quotes in bash http://www.stevemorin.com/utils/bashEscape.html

AMQP http://www.amqp.org http://en.wikipedia.org/wiki/Advanced_Message_Queuing_Protocol

I have started beginner Yoga in downtown San Francisco and love it. I go to http://www.itsyoga.net 307 5th Street Suite A San Francisco, CA 94107 (415) 543-1970 If your a beginner and want a great class you should come. Steve

Python for loop >>> for i in range(10): ... print i ... 0 1 2 3 4 5 6 7 8 9 >>>

I put programming perls in google by accident and this link came up http://homepages.cwi.nl/~tromp/pearls.html Have a few compact and cool programs in particular a cool prime sieve. Steve

If you want to stop one node in a hadoop cluster run the following two commands. /usr/local/hadoop/bin/hadoop-daemon.sh --config /usr/local/hadoop/bin/../conf stop datanode /usr/local/hadoop/bin/hadoop-daemon.sh --config /usr/local/hadoop/bin/../conf stop tasktracker

Here is how to stop a single tasktracker node in a hadoop cluster. /usr/local/hadoop/bin/hadoop-daemon.sh --config /usr/local/hadoop/bin/../conf stop tasktracker

The normal command you are shown shutsdown the entire cluster. To shutdown a single datanode for maintenance run the following command. /usr/local/hadoop/bin/hadoop-daemon.sh --config /usr/local/hadoop/bin/../conf stop datanode

test if variable exists in perl Just use the boundp function (setq x 1) => 1 (boundp 'x) => true

In most cases just use the perl function defined if(defined $somevar) { print "This variable exists\n"; }