infinite possibility

Another Simple console.log wrapper – debug log for all browsers

naoko — Sun, 19 Feb 2012 04:22:13 +0000

Issues:

1. You can add console.log all day long but at the end of the day you have to remove them.

2. When testing on IE, you got to comment out or remove console.log otherwise it will error out.

3. for IE, you might end up adding Alert(msg). Clicking Alert could become painful.

Solution (might not be the best but works):

So I wrote Another simple console.log wrapper that meets what I need for now (super super simple)

Out put on IE would look like this:

Fun with Debugging

Header

contents here

Advnaced Django Tutorial

naoko — Wed, 08 Feb 2012 01:36:20 +0000

2 years old but worth watching. Good Stuff.

PyCon 2010: Intermediate Tutorial by James Bennett – Django’s release manager, and also contributes to the documentation and provide the occasional bugfix.
Currently, he’s part of the Web development team at Mozilla.

PostgreSQL Utility for EnterpriseDB Installation

naoko — Tue, 31 Jan 2012 05:00:05 +0000

PostgreSQL Installer provided by EnterpriseDB is so handy and make your life very easy for OS X Desktop installation.

Maybe I just don’t know the handy utility but I wrote a shell script to control/display various tasks hence I wanted to share this with you.

NODE_NAME=`uname -n`

NODE_NAME=${NODE_NAME%%\.*local}

NODE_NUMBER=${NODE_NAME##*SQL-}

PGBIN=/Library/PostgreSQL/9.1/bin

PGDATA=/Library/PostgreSQL/9.1/data

pidof(){

# usage: `pidof`

ps -ef | grep postgres | awk '{if ($3==1)print $2}'

start(){

pid=`pidof`

if [ "$pid" == "" ] ; then

echo "Starting postgres..."

su - postgres -c "${PGBIN}/pg_ctl -w start -D ${PGDATA} -l ${PGDATA}/pg_log/startup.log"

else

status

fi

stop(){

pid=`pidof`

if [ "$pid" != "" ] ; then

echo "Stopping postgres..."

su - postgres -c "${PGBIN}/pg_ctl stop -m smart -w -D ${PGDATA}"

else

echo "Postgres is not running"

fi

stopfast(){

pid=`pidof`

if [ "$pid" != "" ] ; then

echo "Stopping postgres..."

su - postgres -c "${PGBIN}/pg_ctl stop -m fast -w -D ${PGDATA}"

else

echo "Postgres is not running"

fi

stopnow(){

pid=`pidof`

if [ "$pid" != "" ] ; then

echo "Stopping postgres..."

su - postgres -c "${PGBIN}/pg_ctl stop -m immediate -w -D ${PGDATA}"

else

echo "Postgres is not running"

fi

status(){

pid=`pidof`

if [ "$pid" != "" ] ; then

echo "postgres is running"

echo `ps -ef | grep postgres | grep -v grep | awk '{if ($3==1) print "Postgres: " $8 ", Data Directory: " $10}'`

else

echo "postgres is not running"

fi

vac_status(){

su - postgres -c "${PGBIN}/psql -c \"select relname, last_autovacuum, last_autoanalyze from pg_stat_user_tables where last_autovacuum IS NOT NULL order by last_autovacuum desc\""

show_connections(){

su - postgres -c "${PGBIN}/psql -c \"SELECT datname, usename, procpid, client_addr, waiting, query_start, current_query FROM pg_stat_activity;\""

version(){

su - postgres -c "${PGBIN}/psql -c \"SELECT version()\""

restore_bak(){

echo "backup file path : "

read BACKUPFILEPATH

echo "database name : "

read DBNMAE

chmod -R 777 $BACKUPFILEPATH

cat ${BACKUPFILEPATH} | gunzip | ${PGBIN}/psql -U postgres ${DBNMAE}

${PGBIN}/psql -d ${DBNMAE} -U postgres < /users.sql

case "$1" in

start)

start

;;

stop)

stop

;;

status)

status

;;

restart)

stop

start

;;

stopfast)

stopfast

;;

stopnow)

stopnow

;;

vac_status)

vac_status

;;

show_connections)

show_connections

;;

restore_bak)

restore_bak

;;

version)

version

;;

*)

echo "Usage: $0 { start | stop | restart | stopfast | stopnow | status | vac_status | show_connections | version | restore_bak }"

exit 1

esac

exit 0

PostgreSQL DB Version Control with apgdiff

naoko — Mon, 30 Jan 2012 04:05:41 +0000

apgdiff (Another PostgreSQL Diff Tool) is so easy to setup and use.

# you need at least Java 1.6

$ java -version

java version “1.6.0_29″
Java(TM) SE Runtime Environment (build 1.6.0_29-b11-402-10M3527)
Java HotSpot(TM) 64-Bit Server VM (build 20.4-b02-402, mixed mode)

# download binary and that’s it.

$ curl -O http://apgdiff.startnet.biz/download/apgdiff-2.3-bin.zip
$ unzip apgdiff-2.3-bin.zip

# create SQL dump files

$ pg_dump –host HOST_IP –port 5432 -U DB_USER -s -f new.sql ALPHA_DB
$ pg_dump –host HOST_IP –port 5432 -U USER -s -f old.sql PROD_DB

# generate upgrade statement

$ PATH_TO_APGDIFF=/tmp/apgdiff
$ java -jar $PATH_TO_APGDIFF/apgdiff-2.3.jar –ignore-start-with old.sql new.sql > upgrade.sql

Know how to use Chrome developer tools I – Disable Cache

naoko — Sun, 29 Jan 2012 21:50:37 +0000

1. Open Web Developer Tools
(Option + Command + i) or (Menu > View > Developer > Developer Tools

2. Disable Cache

2.1. Go to Settings

2.1.1. Click Gear icon on lower bottom

2.1.2. Check Disable Cache

Python – Calling Python Function From Terminal

naoko — Fri, 27 Jan 2012 02:00:33 +0000

#!/usr/local/bin/python
# how to call this
# $ python /Users/nreeves/Desktop/test.py greeting “How are you?”
# >> Hello greeting
# $ python /Users/nreeves/Desktop/test.py food “Rice” “Potato”
# >>I want to eat food and food
# $ python /Users/nreeves/Desktop/test.py foo “bar”
# >>programmer error!

import sys

def greeting(arg1):
print‘Hello%s‘% (arg1)

def food(arg1, arg2):
print‘I want to eat%sand%s‘% (arg1, arg2)

def main():
if len(sys.argv) > 1: function=sys.argv[1]
if len(sys.argv) > 2: arg1=sys.argv[1]
if len(sys.argv) > 3: arg2=sys.argv[1]

if function ==“greeting”:
        greeting(arg1)
elif function ==“food”:
        food(arg1, arg2)
else:
        print“programmer error!”

if __name__ == “__main__”:
main()

PostgreSQL – Document PostgreSQL functions

naoko — Sun, 22 Jan 2012 19:25:46 +0000

Yep, documentation is critical. Everyone knows that Search-ability of the documentation is critical as documentation.

We started to document postgreSQL trigger/functions and created view to list function name, definition and comments etc… It is pretty handy and would like to share this with you.

– Add Comments

COMMENT ON FUNCTION my_function(text) IS ‘function description’;

– Search by Comments

SELECT * from pg_catalog.pg_description WHERE description = ‘function description’; — Search for Specific description

– List All Functions along with Comments

SELECT p.proname
,p.proargnames
,obj_description(p.oid)
,pg_get_functiondef(p.oid)
,CASE WHEN p.prorettype=2279 THEN ‘Trigger Function’ ELSE ‘Function’ END as type
FROM pg_proc p
JOIN pg_namespace nspance ON nspance.oid = p.pronamespace
WHERE
nspname=’public’ AND proowner <> 10
– AND proname = ‘my_function’ — Search for Specific function
– AND p.prorettype=2279 — Triggere Function Only
ORDER BY 5, 1

Install Python2.7.2, apache, wsgi on Ubuntu 10.04 LTS

naoko — Wed, 28 Sep 2011 02:30:30 +0000

My initial attept failed miserably as you can see my post from here…

After bunch of help from many intelligent people I successfully setup Python2.7.2, apache, wsgi for Ubunut 10.04 LTS

++++++++++++++++++++++++++++++
+ References:
+ 1. How to install 2.7 comment made by Alen here
+ 2. How to install wsgi
++++

# ==== Setup Ubuntu 10.04 on VMWare # on server:
# install basic stuff…
sudo apt-get update
sudo apt-get upgrade
sudo apt-get install openssh-server # only if you want to use ssh
sudo apt-get install vim # only if you like vim….
sudo apt-get install libpq-dev
sudo apt-get install curl # only if you like over wget.. I am just so used to curl over wget since os-x (my dev machine) doesn’t have wget
sudo apt-get install build-essential

##### # Install Python 2.7.2 #####

sudo vim /etc/apt/sources.list

# add the following 2 lines at the bottom of the file:

deb http://ppa.launchpad.net/fkrull/deadsnakes/ubuntu lucid main
deb-src http://ppa.launchpad.net/fkrull/deadsnakes/ubuntu lucid main

# issue the following command:

sudo apt-key adv –keyserver keyserver.ubuntu.com –recv-keys DB82666C
sudo apt-get update
sudo apt-get install python2.7 python2.7-dev

# verify instllation

which python >>/usr/local/bin/python
python -V >> Python 2.7.2

# verify the linkage

ldd /usr/local/bin/python2.7

##### # Install Apache #####
# you need to install apache2-dev for wsgi installation

sudo apt-get install apache2 apache2-dev

# then add domain.

sudo vim /etc/apache2/conf.d/fqdn
# add: “ServerName localhost” without quotes

################################
# install wsgi
################################
# if wsgi is installed via apt-get then purge it:

sudo apt-get purge libapache2-mod-wsgi

mkdir tmp # or wherever you want to compile
cd tmp
curl -O http://modwsgi.googlecode.com/files/mod_wsgi-3.3.tar.gz tar xzf mod_wsgi-3.3.tar.gz
rm mod_wsgi-3.3.tar.gz
cd mod_wsgi-3.3 ./configure –with-python=/usr/local/bin/python make sudo make install
# the load declaration for the module needs to go wsgi.load
sudo vim /etc/apache2/mods-available/wsgi.load
# then add the following line: “LoadModule wsgi_module /usr/lib/apache2/modules/mod_wsgi.so” without quotes
# Then you have to activate the wsgi module with:
sudo a2enmod wsgi

# That’s it!

Open SSH (Port 22) on Fedora 15

naoko — Thu, 01 Sep 2011 01:13:14 +0000

So Fedora 15 with GNOME 3 is very beautiful. I really like it. Mac’s spotlight like search is +1.

I had a bit hard time accessing my macbook to Fedora 15 via SSH so I thought I should share this with you.

1. Modify sshd_conf file (/etc/ssh/sshd_config): Find Line “Port 22″ and uncomment the line

2. Restart sshd service by issuing

$ service sshd stop$ service sshd restart

3. Let’s check to see if sshd is running

$ service sshd status# or you could$ ps aux|grep sshd

3. Okay, let’s test it. Go to client (my case is my macbook) and issued $ ssh username@ip_address Connect then I got “Connection Refused” Error. So looks like I need to mess with firewall (iptables).

3.1 Edit file /etc/sysconfig/iptables and add the following line. Note that this should go above the first instance of -A INPUT otherwise other rule might block you as rule will will be read from top down and stops as soon as it meets the rule.

# to open ssh
-A INPUT -m state –state NEW -m tcp -p tcp –dport 22 -j ACCEPT

3.2. Save and close the file and restart iptables as follows:

$ service iptables restart

4. Then try this again: $ ssh username@ip_address Hopefully you are connected….

PostgreSQL – Document Table and Column Description (Comments on Table and Column)

naoko — Thu, 04 Aug 2011 04:08:27 +0000

– Add comment to table

COMMENT ON TABLE fnl is ‘Customer Information’

– Add comment to column

COMMENT ON COLUMN customer.id is ‘customer primary key’

– Retrieve Info Individually

SELECT col_description((select c.oid from pg_catalog.pg_class c where c.relname = ‘customer’), 1)

SELECT obj_description((select c.oid from pg_catalog.pg_class c where c.relname = ‘customer’))

– Retrieve Info for one table

SELECT

cols.column_name

,(select pg_catalog.obj_description(oid) from pg_catalog.pg_class c where c.relname=cols.table_name) as table_comment

,(select pg_catalog.col_description(oid,cols.ordinal_position::int) from pg_catalog.pg_class c where c.relname=cols.table_name) as column_comment

FROM information_schema.columns cols

WHERE cols.table_catalog=’database_name’ and cols.table_name=’customer’