Brent Dodson

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Science Humor:

Algebraic symbols are used when you do not know what you are talking about.
-- Philippe Schnoebelen

Chuck Norris Humor:

The universe was created when Chuck Norris roundhouse kicked a star in the face for being too bright.

Jobs:

Need a Job?
Check these out!!!!!
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Tempe Weather Forecast, AZ (85281)

Execute a Unix Command with Node.js -

// http://nodejs.org/api.html#_child_processes
var sys = require('sys')
var exec = require('child_process').exec;
var child;

// executes `pwd`
child = exec("pwd", function (error, stdout, stderr) {
sys.print('stdout: ' + stdout);
sys.print('stderr: ' + stderr);
if (error !== null) {
console.log('exec error: ' + error);
}
});

// or more concisely

var sys = require('sys')
var exec = require('child_process').exec;
function puts(error, stdout, stderr) { sys.puts(stdout) }
exec("ls -la", puts);

Remove all .svn and dot-underscore files -
`find . -name ".svn" -prune -o -name "._*" -exec rm -if {} \;`

linux shell: making the shell alert or beep -
`echo -en '\007'`

Create a daily notes file using a Ruby shell script -
The following snippet launches a new gedit file with todays date when executed from a bash script. gedit `ruby -e "puts %q(m/notes%s.txt) % Time.now.strftime('%d%m%y')"` observed: gedit starts with a new file called notes050210.txt in the ~/m directory.

Install and run a seperate instance of opera including tsocks -
`# download and unzip opera ... % sh install.sh --prefix=/opt/opera-socks # run opera with profile prefix and tsocks: % tsocks /opt/opera-socks/bin/opera -pd socks # opera does not support sockets directly # remember that dns is not routed over socks (afaik) % cat /etc/tsocks.conf local = 10.0.0.0/255.255.255.0 server = 10.0.0.204 server_port = 1080 server_type = 5`

BASH: Re-run previous command performing global substitution -
Re-run the previous command (accessed via !!) replacing 'foo' with 'bar' globally. `!!:gs/foo/bar/`

Launch parallel shell process -

Bash in not specially well suited to run background jobs, but it can be accomplish. This is a simple parallel process launcher:


#!/bin/bash

# Echo to stderr
#
debug() {    
echo "$@" >&2
}

# check_process PID
#
check_process() { kill -0 $1 2>/dev/null; }

# run_parallel NPROCESS FACTORY
#
# Run N parallel proceses, wait until EOF and all running processes are finished
#
#
# FACTORY is a process/function that returns (using stdout) the command to run
# 
# The status code of FACTORY is interpreted like this:
#
#   0: There is more data
#   != 0: There is no more data to process
#
run_parallel() {
NPROCESS=$1  
shift

PIDS=()  
EOF=0
while test $EOF = 0 -0 ${#PIDS[*]} -ne 0; do
if test $EOF = 0 -a ${#PIDS[*]} -lt $NPROCESS; then
if ! COMMAND=$("$@"); then
debug "EOF"
EOF=1
fi
if test "$COMMAND"; then 
$COMMAND &
PID=$!
debug "starting process: $@ ($PID)"
PIDS[$PID]=$PID
fi
fi

debug "active processes: ${PIDS[*]}"
sleep 0.5

for PID in ${PIDS[*]}; do      
if ! check_process $PID; then
wait $PID 
unset PIDS[$PID]
debug "process finished: $PID"
fi
done        
done
}

An example of usage:


process() {
read -t1 SEC &&{ debug "sleep $SEC"; return; } 
test $? -eq 142 &&return || return 1
}

run_parallel 4 process

disk usage statics shell -
// description of your code here dirs=`ls` for dir in $dirs do if [ -d $dir ] then size=`cd $dir;du -sh` echo "$dir $size" fi done

Simple files watch associated to commands -
The is the scenario: you want to run a command wherever a file (or files) is modified. This is the most basic approach (you will need inotify): `#!/bin/bash # Usage: onchange.sh "COMMAND" FILE1 ... [FILEN] set -e RUNFIRSTLOOP=1 COMMAND=$1 shift test "$RUNFIRSTLOOP" &&bash -c "$COMMAND" \|\| { echo "retcode: $?"; } while inotifywait "$@"; do bash -c "$COMMAND" \|\| { echo "retcode: $?"; } done`

open gem with textmate -

open_gem is a rubygem. It adds a Gem Command to easily open a ruby gem with an editor. The Editor is specified with the -c option (or in $GEM_OPEN_EDITOR or $EDITOR). After Installation


$ sudo gem update --system
$ sudo gem install open_gem

this is the Syntax


$ gem open name_of_the_gem_to_open -c name_of_the_editor

and this Example opens 'open_gem' with 'textmate'


$ gem open open_gem -c mate

For any questions or enquiries, i can be reached at my email
I look forward to hearing from you

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