reterVision

# Update brew & install the latest postgres first
brew update
brew install postgres

# Shut down the old running postgres
# Assume you previously installed postgres using homebrew
pg_ctl -D /usr/local/Cellar/posgres/9.1.1 stop

# If postgres won't stop, you have to do the following step to unload it from LaunchAgents
launchctl unload -w ~/Library/LaunchAgents/org.postgresql.postgres.plist

reterVision

CREATE ROLE <newuser> WITH LOGIN ENCRYPTED PASSWORD <password>;

CREATE VIEW <viewname> AS SELECT * FROM <yourtable> LIMIT 20;

GRANT CONNECT ON DATABASE "<databasename>" TO <newuser>;

GRANT SELECT ON schemaname.viewname TO <newuser>;


REVOKE ALL PRIVILEGES ON <schemaname> FROM <newuser>;

reterVision

# How to merge other branch to master.

# First fetch the changes from your branch, could be made by others
git fetch

# Then commit your changes.
git commit -m "some"
git push origin my-branch

# Switch to master branch and pull the latest code to your local.

reterVision

# Sometimes we could mistakenly commit something without pull first, so
# here is how we revert this process and keep our master branch clean.

# Reset back to the commit before you last commit.
# git reset --mixed will keep your changes and revert other files back 
# to that commit.
git pull
git reset --mixed HEAD-before-your-last-commit

# Commit your changes again.

reterVision

#!/bin/sh

git status | grep 'modified\|added' | awk '{system("pyflakes "$3)}'
git status | grep 'modified\|added' | awk '{system("pep8 "$3)}'

reterVision

#!/usr/bin/env python

import subprocess
import argparse


parser = argparse.ArgumentParser(description='Do the symbolic for you.')
parser.add_argument('--source', dest='folder',
                   help='Your code directory')
parser.add_argument('--virtual', dest='vfolder',

reterVision

"""
Permulation algorithm implemented in Python.
"""
array = range(1, 4)


def perm(array, lower, upper):
    if lower >= upper:
        print array
    else:

reterVision

from datetime import datetime


class LRUCacheItem(object):
    """Data structure of items stored in cache"""
    def __init__(self, key, item):
        self.key = key
        self.item = item
        self.timestamp = datetime.now()

reterVision

#include <stdio.h>
#include <unistd.h>
#include <fcntl.h>

int main(int argc, char *argv[])
{
    int fd, fdw;
    int pid;

    pid = fork();

reterVision

# Extracted information from below
# http://rbgeek.wordpress.com/2012/05/11/how-to-add-2nd-hard-drive-to-ubuntu/
# http://ubuntuforums.org/showthread.php?t=1659376

# 1. List out all the disk you have in hand now.
sudo fdisk -l

# 2. Create partition on the secondary hard drive.
#    Remember to create logical partition.
sudo fdisk /dev/sdb