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Ahmad Hassan ahmadhasankhan

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ahmadhasankhan / database.yml.example Oracle
Created September 3, 2014 09:38
Rails 4 database.yml config files.
# Oracle/OCI 8i, 9, 10g
#
# Requires Ruby/OCI8:
# http://rubyforge.org/projects/ruby-oci8/
#
# Specify your database using any valid connection syntax, such as a
# tnsnames.ora service name, or an SQL connect string of the form:
#
# //host:[port][/service name]
#
@ahmadhasankhan
ahmadhasankhan / rails-style-guide.md
Last active August 29, 2019 19:20

The Rails Style Guide

This Rails style guide recommends best practices so that real-world Rails programmers can write code that can be maintained by other real-world Rails programmers. A style guide that reflects real-world usage gets used, and a style guide that holds to an ideal that has been rejected by the people it is supposed to help risks not getting used at all – no matter how good it is.

The guide is separated into several sections of related rules. I've tried to add

@ahmadhasankhan
ahmadhasankhan / db_backup.rb
Last active August 6, 2021 13:36
MySQL DB backup script in Ruby CMD
#1===========First code================
#!/usr/bin/env ruby
databases = {
:local_db => {
:database => 'my_db',
:username => 'root',
:password => 'admin',
:host => 'localhost'
@ahmadhasankhan
ahmadhasankhan / AddTestSuiteInRails.md
Last active December 18, 2015 12:51
Adding Test Suite In Rails -4 with rspec-3
In gem file
group :development, :test do
  gem 'rspec-rails', '~> 3.0.0'
  gem 'factory_girl_rails'
  gem 'capybara'
  gem 'database_cleaner'
end
@ahmadhasankhan
ahmadhasankhan / Ruby and Rails Interview Cheat Sheet.md
Last active April 13, 2024 19:55
This is my Ruby interview cheat sheet. Feel free to fork it, Use it, Share it, or do whatever you want with it. PLEASE let me know if there is any error or if anything crucial is missing. I will keep updating...

Ruby and Rails Interview Questions

Ruby

  • What is a class?
  • What is an object?
  • What is a module? Can you tell me the difference between classes and modules?
  • Can you tell me the three levels of method access control for classes and modules? What do they imply about the method?
  • There are three ways to invoke a method in ruby. Can you give me at least two?
  • Explain this ruby idiom: a ||= b
@ahmadhasankhan
ahmadhasankhan / AuthLogic with Ruby On Rails-4.md
Last active December 20, 2015 07:19
Implementing user registration and session handling using AuthLogic in Rails 4 from scratch.

AuthLogic with Ruby On Rails-4

Implementing user registration and session handling using AuthLogic in Rails 4 from scratch.

Follow along:

Create a new rails application-

$ rails new login_application
$ cd login_application
$ vim Gemfile
@ahmadhasankhan
ahmadhasankhan / RailsDeployment.md
Created December 28, 2015 20:42
Rails server setup for production environment.

Deploy Ruby On Rails on Ubuntu 14.04

Server: Nginx with Phusion Passenger

Ruby Version: 2.1.3

User System: deploy

User System

@ahmadhasankhan
ahmadhasankhan / frog_problem.md
Created February 11, 2016 08:42
Frog Interview Problem 
def solution(a, x, d)
  k = a.size
  position = 0
  if position+d >= x
    return 0;
  end

  (0..k).each do |i|
 if (a[i] - position) <= d
@ahmadhasankhan
ahmadhasankhan / MySql-5.5-installation guide.md
Last active June 10, 2022 17:35
Install MySQL 5.5.xx on Ubuntu
@ahmadhasankhan
ahmadhasankhan / modifies_the_array.md
Last active November 19, 2017 06:33
Write a function which accepts an integer array and its size and modifies the array in the following manner. 
# 1) If the elements of index i and (i+1) are equal then, double the value at index i
# and replace the element at index (i+1) with 0.
# 
#     2) If the element at index i is 0, then ignore it.
# 
#     3) Any number (element in an array) must be modified only once.
# 
#     4) At the end, shift all the zeros (0s) to the right of the array and remaining
# nonzeros to the left of the array.