jvidalba1

Introduction to Ruby

Things about Ruby

• Everything in Ruby is an Object (except blocks) and everything has methods.
• In Ruby, {} are generally interchangeable with the keywords do and end.
• There is no method overloading, the last one declared is invoked, because it overrides the others.
• Instance variables (attributes) are trapped inside the instance and need to be published throught attribute accessors methods, for instance.

The Ruby style guide

rderoldan1

  t.integer :int                 # int (4 bytes, max 2,147,483,647)
  t.integer :int1, :limit => 1   # tinyint (1 byte, -128 to 127)
  t.integer :int2, :limit => 2   # smallint (2 bytes, max 32,767)
  t.integer :int3, :limit => 3   # mediumint (3 bytes, max 8,388,607)
  t.integer :int4, :limit => 4   # int (4 bytes)
  t.integer :int5, :limit => 5   # bigint (8 bytes, max 9,223,372,036,854,775,807)
  t.integer :int8, :limit => 8   # bigint (8 bytes)
  t.integer :int11, :limit => 11 # int (4 bytes)

ryansobol

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.

runlevel5

How to install Ruby 1.9.3-p392 on Mac OSX 10.8+

RVM:

rvm get stable && rvm reload

Firstly, the OpenSSL comes with your OSX 10.8+ is outdated, you need to get latest version

rderoldan1

###This error can appear when you try to install ruby gems follow this steps:

###Error: no such file to load --zlib 1. sudo apt-get install zlib1g zlib1g-dev 2. cd /usr/src/ruby-1.9.2-p180/ext/zlib/ 3. sudo ruby extconf.rb 4. sudo make 5. sudo make install

nhocki

# Los nombres de las CLASES y MODULOS debe empezar con mayúscula
# Se considera buena práctica poner estos nombres en un CamelCaseConMayusculaAlPrincipio

module Nameable
  
  # El método self.included se llama cuando una clase INCLUYE este módulo
  # El parámetro 'base' es la CLASE que incluye el método
  # En este caso es la clase 'Car' y la clase 'User'
  # NOTA: No existe un hook similar para extend (no existe self.extended(base)).
  def self.included(base)