ollie

def tip(msg); puts; puts msg; puts "-"*100; end

#
# 30 Ruby 1.9 Tips, Tricks & Features:
# http://www.igvita.com/2011/02/03/new-ruby-19-features-tips-tricks/
#

tip "Upgrading to Ruby 1.9 is simple: rvm install 1.9.2 && rvm --default 1.9.2"

tip "Ruby 1.9 supports named captures in regular expressions!"

ollie

'asdščěřžýasd'.mb_chars.upcase
# or
require 'unicode'
Unicode.upcase 'asdščěřžýasd'.upcase

ollie

# Ruby 1.8 Hash syntax:
some_hash = { :person => 'John Doe', :age => 30 } # Hash-Rocket-style

# Ruby 1.9 Hash syntaxes:
some_hash = { :person => 'John Doe', :age => 30 } # Hash-Rocket-style syntax still there.
some_hash = { person: 'John Doe', age: 30 }       # JSON-style syntax, keys are symbols behind the scenes.

# Watch out!
some_hash = { 'person' => 'John Doe', 'age' => 30 } # This will work.
some_hash = { 'person': 'John Doe', 'age': 30 }     # This will not work!

ollie

# Some time-related helpers.
class Fixnum
  # Go back in time from right now.
  #
  #   5.days.ago => 2014-06-12 13:21:38 +0200
  #
  # @return [Time]
  def ago
    before(Time.now)
  end

ollie

class Person
  class << self
    # Make it available from the outside
    attr_reader :traits

    # This removes duplication in this class and subclasses
    def init_variables
      @traits = {}
    end

ollie

#!/usr/bin/env ruby

require 'pathname'
require 'open3'

# Mass-pull git repositories.
#
#   GitPull.mass_pull(Dir.pwd)
class GitPull
  # Check for this string in directory names.

ollie

namespace :db do
  desc 'Find missing table indexes, foreign keys and null false columns'
  task indexes: :environment do
    require 'rainbow'
    require 'tables_health'

    connection    = ActiveRecord::Base.connection
    tables_health = TablesHealth.new(connection)

    tables_health.indexes_report

ollie

require 'net/telnet'

class Client
  # Fetch weather forecast for NYC.
  #
  # @return [String]
  def response
    fetch_all_in_one_response
    # fetch_multiple_responses
  ensure

ollie

# A bunch of statistics-related methods.
#
# @example
#   p Math::Stats.percentile(40, [15, 20, 35, 40, 50]) == 29.0
#   p Math::Stats.percentile(75, [1, 2, 3, 4]) == 3.25
#   p Math::Stats.median([15, 20, 35, 40, 50]) == 35.0
#   p Math::Stats.median([1, 2, 3, 4]) == 2.5
#   p Math::Stats.sum([15, 20, 35, 40, 50]) == 160
#   p Math::Stats.mean([15, 20, 35, 40, 50]) == 32.0
#   p Math::Stats.sample_variance([15, 20, 35, 40, 50]) == 207.5

ollie

# Set language environment
export LC_CTYPE=cs_CZ.UTF-8
export LC_ALL=cs_CZ.UTF-8
export LANG=cs_CZ.UTF-8

# Setup preferred editor
export EDITOR='vim'

# Some handy aliases
alias l="ls -la"