swistak35

class Vehicle
  class << self
    attr_accessor :count
    def finalize(id)
      @count -= 1
    end

    def all #returns an array of all Vehicle objects
      ObjectSpace.each_object(Vehicle).to_a
    end

swistak35

# Functional:

new_person = ->(name,birthdate,gender,title,id=nil) {
  return ->(attribute) {
    return id        if attribute == :id
    return name      if attribute == :name
    return birthdate if attribute == :birthdate
    return gender    if attribute == :gender
    return title     if attribute == :title
    nil

swistak35

# Firstly, install gems: 'evilr' and 'include'

# Example with User in a shop application.
# He has two roles
#   - buyer (with money on the account and so on)
#   - reviewer (he can review books he bought)


require 'evilr'
require 'include'

swistak35

params[:foo] = DecimalSupport.parse_model_decimals(params[:foo], Foo)

swistak35

def before_save(model)
  model.class.columns.each do |column|
    if column.type == :decimal
      int_part, frac_part = model.send(column.name).to_s.split(".")
      new_value = [int_part, frac_part[0...column.scale]].join(".")
      model.send("#{column.name}=", new_value)
    end
  end
end

swistak35

1.9.3p362 :002 > [1,2,3,4,5].find_and_replace(:odd?, &:to_s)
 => ["1", 2, "3", 4, "5"] 
1.9.3p362 :003 > [1,2,3,4,5].find_and_replace(Proc.new(&:odd?), &:to_s)
 => ["1", 2, "3", 4, "5"] 
1.9.3p362 :005 > [1,2,3,4,5].find_and_replace(->(x) { x.odd? }, &:to_s)
 => ["1", 2, "3", 4, "5"]
1.9.3p362 :006 > [1,2,3,4,5].find_and_replace(->(x) { x.odd? }) do |x|
1.9.3p362 :007 >   x.to_s
1.9.3p362 :008?> end
 => ["1", 2, "3", 4, "5"]

swistak35

type ast 	= Cons of ast * ast
			| Write
			| Read

open Printf
open Scanf


let myVar = ref 0
let set_myVar x =

swistak35

~% echo "" > bar 
~% cat bar

~% irb
1.9.3-p547 :001 > f = File.open("bar", "w")
 => #<File:bar> 
1.9.3-p547 :002 > f.write("test1")
 => 5 
1.9.3-p547 :003 > 
zsh: suspended  irb

swistak35

t1 = Thread.new do
  f = File.open("bar", "w")
  sleep(rand(5) + 2)
  f.write("test_1")
  f.close
end


t2 = Thread.new do
  f = File.open("bar", "w")

swistak35

str = "The quick fox and dog trololo"
/fox/.match(str)

def search2(str)
  /and/.match(str)
  puts "Inside method2: #{$&}"
end

def search(str)
  /dog/.match(str)