IslamAzab

Creating Rails Project

Initialization

# List available rubies, to choose which ruby to use
$ rvm list rubies

# To install new ruby use, for example version '2.4.1'
$ rvm install 2.4.1

IslamAzab

# Extended python -m http.serve with --username and --password parameters for
# basic auth, based on https://gist.github.com/fxsjy/5465353

from functools import partial
from http.server import SimpleHTTPRequestHandler, test
import base64
import os


class AuthHTTPRequestHandler(SimpleHTTPRequestHandler):

IslamAzab

sudo -i
cd
apt-get install build-essential checkinstall && apt-get build-dep imagemagick -y
sudo apt-get install libperl-dev gcc libjpeg-dev libbz2-dev libtiff4-dev libwmf-dev libz-dev libpng12-dev libx11-dev libxt-dev libxext-dev libxml2-dev libfreetype6-dev liblcms1-dev libexif-dev perl libjasper-dev libltdl3-dev graphviz pkg-config
wget http://www.imagemagick.org/download/ImageMagick.tar.gz
tar xf ImageMagick.tar.gz
cd ImageMagick-6.9.2-8/
./configure --prefix=/opt/imagemagick-6.9
make
make install

IslamAzab

BEGIN {

  require 'net/http'
  
  Net::HTTP.module_eval do
    alias_method '__initialize__', 'initialize'
    
    def initialize(*args,&block)
      __initialize__(*args, &block)

IslamAzab

Using better_errors on Ubuntu with SublimeText 3

After I installed the fantastic better_errors gem, I was disappointed to notice that linking to your text editor doesn't work correctly on Ubuntu (at least, it didn't for me). Here's how I fixed it.

First, create a new desktop entry:

# /usr/share/applications/subl-urlhandler.desktop

IslamAzab

#!/bin/bash

echo -e "\nbenchmark.sh -n<number of requests> -c<number of concurrency> <URL1> <URL2> ..."

echo -e "\nEx: benchmark.sh -n100 -c10 http://www.google.com/ http://www.bing.com/ \n"

## Gnuplot settings
echo "set terminal jpeg
set output 'benchmark_${1}_${2}.jpeg'
set title 'Benchmark: ${1} ${2}'

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