IslamAzab

sudo -i
apt-get update
apt-get install -y python-pip python-dev build-essential 
pip install psycopg2 
pip install psutil
pip install setuptools
git clone https://github.com/julmon/pg_activity.git 
cd pg_activity/
python setup.py install --with-man

IslamAzab

[1] pry(#<#<Class:0x000000068defe0>>)> quit-program
/home/myuser/.rvm/gems/ruby-2.0.0-p451@mygemset/gems/activesupport-3.2.18/lib/active_support/notifications.rb:125: [BUG] Segmentation fault
ruby 2.0.0p451 (2014-02-24 revision 45167) [x86_64-linux]

-- Control frame information -----------------------------------------------
c:0062 p:0002 s:0343 e:000342 EVAL   /home/myuser/.rvm/gems/ruby-2.0.0-p451@mygemset/gems/activesupport-3.2.18/lib/active_support/notifications.rb:125 [FINISH]
c:0061 p:---- s:0341 e:000340 CFUNC  :eval
c:0060 p:0010 s:0337 E:002598 BLOCK  /home/myuser/.rvm/gems/ruby-2.0.0-p451@mygemset/gems/better_errors-2.1.1/lib/better_errors/raised_exception.rb:37 [FINISH]
c:0059 p:---- s:0331 e:000330 CFUNC  :map

IslamAzab

[user]
        name =
        email =
[color]
        ui = true
[merge]
        log = true
        tool = meld
[alias]
        st = status -s -uno

IslamAzab

-- POSTGRESQL check for duplicate primary keys due to
-- BUG #11141: Duplicate primary key values corruption
-- http://www.postgresql.org/message-id/20140811083748.2536.10437@wrigleys.postgresql.org

-- Select all tables (excluding schema_migrations table)
-- SELECT TABLE_NAME AS tablename
-- FROM information_schema.tables
-- WHERE table_schema = 'public'
--  AND TABLE_NAME != 'schema_migrations'
-- ORDER BY TABLE_NAME;

IslamAzab

# http://guides.rubygems.org/command-reference/#gem-environment
--- 
gem: --no-document --verbose --backtrace
update_sources: true
backtrace: true

IslamAzab

I'm hunting for the best solution on how to handle keeping large sets of DB records "sorted" in a performant manner.

Problem Description

Most of us have work on projects at some point where we have needed to have ordered lists of objects. Whether it be a to-do list sorted by priority, or a list of documents that a user can sort in whatever order they want.

A traditional approach for this on a Rails project is to use something like the acts_as_list gem, or something similar. These systems typically add some sort of "postion" or "sort order" column to each record, which is then used when querying out the records in a traditional order by position SQL query.

This approach seems to work fine for smaller datasets, but can be hard to manage on large data sets with hundreds (or thousands) of records needing to be sorted. Changing the sort position of even a single object will require updating every single record in the database that is in the same sort group. This requires potentially thousands of wri

IslamAzab

  def self.reindex!
    model_name      = self.name.to_s
    total           = self.count
    indexed         = 0.to_f
    progress        = 0.to_f
    row_length      = 100.to_f
    log_level       = Sunspot::Rails::LogSubscriber.logger.level
    time_start      = Time.now
    each_second     = Time.now
    per_second      = 0

IslamAzab

# Make gems available
require 'rubygems'

begin
  require "ap"
  alias pp ap
rescue LoadError
  puts "Please install the 'awesome_print' gem."
end

IslamAzab

sudo apt-get install libfribidi0 libfribidi-dev

Download the appropriate package from here

vim /usr/share/applications/gnome-terminal.desktop

add this

Terminal=true

Exec=/usr/bin/bicon.bin

IslamAzab

Originally published in June 2008

When hiring Ruby on Rails programmers, knowing the right questions to ask during an interview was a real challenge for me at first. In 30 minutes or less, it's difficult to get a solid read on a candidate's skill set without looking at code they've previously written. And in the corporate/enterprise world, I often don't have access to their previous work.

To ensure we hired competent ruby developers at my last job, I created a list of 15 ruby questions -- a ruby measuring stick if you will -- to select the cream of the crop that walked through our doors.

What to expect

Candidates will typically give you a range of responses based on their experience and personality. So it's up to you to decide the correctness of their answer.