tjeden

def average(*values)
  values.inject(:+)/values.size.to_f if !values.empty?
end

tjeden

def fizz_buzz(n)
  result = ""
  (1..n).to_a.each do |i|
    x = ""
    x += "Fizz" if i % 3 == 0
    x += "Buzz" if i % 5 == 0
    x = i.to_s if x == ""
    result += x
  end
  result

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class Product < ActiveRecord::Base
  validates :price, presence: true, numericality: { greater_than: 0, less_than_or_equal_to: 100 }
  validates :description, presence: true
  validates :title, presence: true, length: { minimum: 4 }, uniqueness: true
end

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module BasiaAttr
  def basia_reader(method_name)
    define_method(method_name) do
      instance_variable_get("@#{method_name}".to_sym)
    end
  end

  def basia_writer(method_name)
    define_method("#{method_name}=") do |value|
      instance_variable_set("@#{method_name}".to_sym, value)

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class ArticlesController < ApplicationController
  def new
    writer = Writer.find(params[:writer_id])
    @article = writer.articles.build
  end
  
  def save
    writer = Writer.find(params[:writer_id])
    @article = writer.articles.build(article_params)
    @article.save

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require 'formula'

class Vim < Formula
  homepage 'http://www.vim.org/'
  url 'ftp://ftp.vim.org/pub/vim/unix/vim-7.3.tar.bz2'
  head 'https://vim.googlecode.com/hg/'
  sha256 '5c5d5d6e07f1bbc49b6fe3906ff8a7e39b049928b68195b38e3e3d347100221d'
  version '7.3.294'

  def features; %w(tiny small normal big huge) end

tjeden

# encoding: UTF-8

contestants = ["piotr3k", "Marcin", "Sławosz", "Nowaker", "Rafał Wrzochol", "Maciej Lotkowski", "regedarek", "Świstak35", "pan_sarin", "jgonera", "Michał Krajewski", "Tomasz Orzechowski", "Piotr Jurczyński", "Maciej Gajewski"]
puts contestants[rand(contestants.length)] 

tjeden

@import url(http://fonts.googleapis.com/css?family=Poly);

body {font-family: 'Poly', serif;}

#preso, .slide {
  background: #fff;
  width: 1920px;
  height: 1080px;
}

tjeden

Aleksander Dąbrowski

Contact details

• Email: aleks@rubysfera.pl
• Twitter: @_tjeden
• Website or Blog: http://rubysfera.pl
• Company: Astarium.pl

Speaker bio

tjeden

module Enumerable
  def inject_with_index(sum = 0)
    each_with_index do |e, i| 
      sum = yield(sum, e , i)
    end
    sum
  end
end

puts ['a', 'b', 'c', 'd'].inject_with_index { |a, e, i| a + i }