How to remove any non-alpha characters (a to z) from a string using gsub and RegEx

12/05/14  Public, Tricks, Ruby General

For example, let's say that you have a method that determines if a particular word (string) is a palindrome or not. As a fringe case, what if the string happens to contain characters like . or...

Command to create a new controller in Rails

12/01/14  Public, Command Line, Rails General

Here's the command to create a new controller in rails, from the command line.

$ rails g controller welcome index about

This example will be for a controller called welcome. In addition to the controller file, it will create two defau...

How to require and re-load a Ruby file during an IRB session

11/24/14  Public, Command Line, Ruby General

This is so you can upload some existing classes and/or methods that you have written in a file, during an IRB session.

1. Make sure you are in the same directory as the file in question, then start the IRB session, i.e. $ irb
2. Enter into...

Way to test a specific section in a file without using Focus

11/24/14  Public, Tricks, Testing / TDD

Adding a focus to a spec file is good way to just test that specific area. The one drawback is you have to remember to remove the...

Skorks

01/01/15  Public, Online Resources

http://www.skorks.com/2010/05/ruby-procs-and-lambdas-and-the-difference-between-them/

What's the difference between procs/lambdas.

http://weblog.jamisbuck.org/2007/2/23/method-visibility-in-ruby

Method visibility in ruby

Here's an...

Summary of rake database migration commands in development

11/16/14  Public, Command Line, Databases

$ rake db:migrate
$ rake db:migrate VERSION=0 --> Removes all migrations, resetting back to ground zero
$ rake db:migrate VERSION=20141013165213 --> Migrates back down to the specific named migration
$ rake db:migrate:status --> *P...

Very common recurring workflow with Git

11/15/14  Public, Workflows, Git

$ git branch --> Should be on your master branch
$ git checkout -b welcome-controller --> This creates a new branch called welcome-controller. Replace "welcome-controller" with name of your new branch
$ git branch --> *Should be o...

After log in should redirect to a page other than default root

11/16/14  Public, Rails General, Gems

When using Devise, when a registered user logs in, they are, by default, directed to the root.

Here is the code to change this to being directed to a page of your choosing

In `app/controllers/appl...

Create records directly in the database through the rails console

11/15/14  Public, Rails General

In the Rails Console:

First method
1. instantiate an object - $ subject = Subject.new
2. set a value - $ subject.name = “John”
3. save the object to the database - $ subject.save

Second method
1. use the cr...

Rails database column migration methods

11/15/14  Public, Databases, Rails General

add_column(table, column, type, options)

remove_column(table, column)

rename_column(table, column, new_name)

change_column(table, column, type, options)