Docker on Rails 7
Simple dev bootstrap rails with docker-compose. You’ll be up and running as quickly as 1..2…3!
Recent Posts
Dockerize your own blog using jekyll
Bootstrap your own jekyll blog with docker-compose
github and multiple oauth provider
Allowing users to login with multiple authentication providers brings great benefits but also results in some annoying edge cases. For example, what happens ...
Rails integrate with Google analytics Api
Here is serveral usefull source:
Using nano as a editor
Installing(if not available) nano for mac/ubuntu
Javascript Vs Ruby methods
source
4 ways to call a ruby method
There is 4 ways to excute ruby method. Two of them can excute private method out of self class.
ruby timeout
standard timeout require 'timeout' begin complete_results = Timeout.timeout(1) do sleep(2) end rescue Timeout::Error puts 'Print me something ...
rspec test failed after changing to capybara-webkit
problem as written some RSpec test for my rails 3.2 application and because I was annyoed by the Browser popping up ich tried to change from firefox to capyb...
capybara webkit or selenium or watir to simulate browser behavior
Sometimes we want to simulate browser behavior. The situation can be test or automation script.
heroku deploy procedure
Just keep record of the procedure to deploy heroku install heroku heroku gem(deprecated) or toolbelt sudo aptitude install heroku-toolbelt #or for ubuntu wge...
Sudo vs RVMSudo
RVM is a great command-line tool which allows you to easily install, manage, and work with multiple ruby environments from interpreters to sets of gems. Thi...
generate random string in ruby
Sometimes we need to generate a ‘n’ character random string.
generate random number in ruby
Sometimes we would also need to generate x random numbers from n to m
Installing rvm on a Mac - Issues With gcc
While installing RVM on a mac, one of the major problems we face are due to missing Xcode. We usually get the error below:
Passing Command Line Arguments to Rake Tasks
Sometimes, we need to rake tasks that inserts a paticular user entered value into multiple databases.
Using NET to Post API Calls With or Without Secure Connections
Using Net module is the best and the eaiest ways to post data or make api calls to urls. Here’s an example
Timestamps strftime vs strptime
###strftime###
Working with Digests and Signatures
###MD5 digests### MD5 is a one-way hashing algorithm for creating digest “signatures” or checksums of strings. MD5 digests are 128 bit (16 byte) signatures. ...
Applying Common Filtering for Rails Api Based Applications
Sometimes there are common sets of fields and id’s that we would like the api to filter before sending the details to the client. It would be great if we can...
Initializing Custom YML Configuration Variables for Different Environments in Rails
Another common problem that rails developers face while developing web applications that connect to multiple external systems and api’s is configuring the th...
Extend vs Include in Ruby Module
Extend vs. Include Modules are used for mixins, ruby’s way of handling muliple inheritance without the complications. There are two ways to mixin, either in...
Ruby Comparison Operators
There has been lots of questions on the comparison operators. So we yanked it for you..
Working with Processes in Unix
There are two commands heavily used by developers for checking their pocesses in unix.
Setting up a development mailer for Rails with a gmail account
Setting up the rails mailer for development purposes is much easier. using the action mailer to configure the gmail services, is just a few commands and conf...
using screen to keep unix sessions active
In Unix, what is screen, and how do I use it?
Using nohup to prevent processes stopping on disconnect
nohup is an unix command which prevents “hangups on logout” which also means that if you decide you need to logoff the from the session with the server, the ...
Understanding Ruby Object Model
classes store methods
binding pry to rails console
Add the following lines to make the rails console to use pry. make sure that
cases and switches in ruby
One of the common questions that we get about people coming from other programing languages is with the way switch cases work in ruby.
Debugging using pry
Add the following gems to the Gemfile and bundle install
Change Computer/Host Name Mac OsX
One of the most common problems that we come across is when the programmer tries to setup the Mac OS X - name/hostname for the computer, since it takes up mo...
Setting up Heroku
##Here are the steps to push a rails project to Heroku##
RVM Setup and Environments
RVM is the Ruby environment manager. Here are some of the commonly used commands.
Using Deligate in ActiveRecord to avoid dots
##Adding deligate method in the model##
Setting up RSpec and Cucumber
##Including RSpec in your code:##
Configuring Mac Vim for Programming
Download and install the latest mvim from
Git alias
Following are some of the common git aliases, people use. Add them to ~/.bash_profile
Mountain Lion and Homebrew
SOURCE
GCC command line tools
When the bundling gems fail in Mac OS X, Download the latest GCC standalone file from the link below:
Learning regular expressions
Learning Regular expressions require regular practice. Here are a few ways to practice:
how to use observer and call back
Add configuration
some ruby on rails interview questions
what’s N+1 problem, how to solve the problem ```ruby clients = Client.limit(10) clients.each do |client| puts client.address.postcode end
octopress no lexer error
just got error /Users/ken/.rvm/gems/ruby-1.9.3-p327/gems/rubypython-0.5.3/lib/rubypython/rubypyproxy.rb:198:in `method_missing’: ClassNotFound: no lexer f...
retry and retry code blocks
simple way to rescue and retry several tries = 0 begin # some routine rescue tries += 1 retry if tries <= 3 puts "no dice!" end #or 3.times do b...
webkit and rspec without x server
capybara-webkit
ruby selenium-webdriver watir-webdriver
There are many other Selenium gems out there, but this is the only official, maintained gem. If you’re looking for a slightly higher level API built on the s...
create ruby dynamic class
```ruby dynamic_name = “TestEval2”
basic metaprogramming ruby class_eval and instance_eval
```ruby class A
how to revert git commit remote
First, There are serveral revert situation: Local: # this will detach your HEAD, i.e. leave you with no branch checked out. git checkout 0d1d7fc32 git checko...
happy number and prime
A happy number is defined by the following process. Starting with any positive integer, replace the number by the sum of the squares of its digits, and repea...
triangle problem
Starting at the top of the triangle below and moving to adjacent numbers on the row below, the maximum total from top to bottom is 23.
learn by practice extend and include
Here is some examples to help understand extend and include ```ruby module M_A def test puts true end end
some command line tools
Some frequently use:
how to use submodule brief instruction
```ruby get the submodule initially git submodule add ssh://bla submodule_dir git submodule init