require 'benchmark'
include Benchmark

class Weeble
  attr_reader :name, :age, :salary, :language
  def initialize(name, age, salary, language)
    @name, @age, @salary, @language = name, age, salary, language
  end

  def sorter
    [@age || 0, @salary || 0, @language || "", @name || ""]
  end
end

weebles = [
    Weeble.new("Aaron",   24, 60_000, "perl"),
    Weeble.new("Bob",     24, 60_000, "python"),
    Weeble.new("Carl",    24, 80_000, "ruby"),
    Weeble.new("David",   24, 80_000, "ruby"),
    Weeble.new("Edward",  24, 90_000, "ruby"),
    Weeble.new("Frank",   33, 60_000, "perl"),
    Weeble.new("Greg",    33, 60_000, "python"),
    Weeble.new("Hecor",   33, 80_000, "ruby"),
    Weeble.new("Ivan",    33, 80_000, "ruby"),
    Weeble.new("Josh",    33, 90_000, "ruby"),
    Weeble.new("Kevin",   24, 60_000, "perl"),
    Weeble.new("Lewis",   24, 60_000, "python"),
    Weeble.new("Mike",    24, 80_000, "ruby"),
    Weeble.new("Noah",    24, 80_000, "ruby"),
    Weeble.new("Oscar",   24, 90_000, "ruby"),
    Weeble.new("Paul",    33, 60_000, "perl"),
    Weeble.new("Quentin", 33, 60_000, "python"),
    Weeble.new("Ryan",    33, 80_000, "ruby"),
    Weeble.new("Steve",   33, 80_000, "ruby"),
    Weeble.new("Titus",   33, 90_000, "ruby"),
    Weeble.new("Aaron",   24, 42_000, "perl"),
    Weeble.new("Bob",     24, 42_000, "python"),
    Weeble.new("Carl",    24, 42_000, "ruby"),
    Weeble.new("David",   24, 42_000, "ruby"),
    Weeble.new("Edward",  24, 42_000, "ruby"),
    Weeble.new("Frank",   33, 42_000, "perl"),
    Weeble.new("Greg",    33, 42_000, "python"),
    Weeble.new("Hecor",   33, 42_000, "ruby"),
    Weeble.new("Ivan",    33, 42_000, "ruby"),
    Weeble.new("Josh",    33, 42_000, "ruby"),
    Weeble.new("Kevin",   24, 42_000, "perl"),
    Weeble.new("Lewis",   24, 42_000, "python"),
    Weeble.new("Mike",    24, 42_000, "ruby"),
    Weeble.new("Noah",    24, 42_000, "ruby"),
    Weeble.new("Oscar",   24, 42_000, "ruby"),
    Weeble.new("Paul",    33, 42_000, "perl"),
    Weeble.new("Quentin", 33, 42_000, "python"),
    Weeble.new("Ryan",    33, 42_000, "ruby"),
    Weeble.new("Steve",   33, 42_000, "ruby"),
    Weeble.new("Titus",   33, 42_000, "ruby"),
    Weeble.new("Aaron",   27, 60_000, "perl"),
    Weeble.new("Bob",     27, 60_000, "python"),
    Weeble.new("Carl",    27, 80_000, "ruby"),
    Weeble.new("David",   27, 80_000, "ruby"),
    Weeble.new("Edward",  27, 90_000, "ruby"),
    Weeble.new("Frank",   27, 60_000, "perl"),
    Weeble.new("Greg",    21, 60_000, "python"),
    Weeble.new("Hecor",   21, 80_000, "ruby"),
    Weeble.new("Ivan",    21, 80_000, "ruby"),
    Weeble.new("Josh",    21, 90_000, "ruby"),
    Weeble.new("Kevin",   21, 60_000, "perl"),
    Weeble.new("Lewis",   21, 60_000, "python"),
    Weeble.new("Mike",    21, 80_000, "ruby"),
    Weeble.new("Noah",    21, 80_000, "ruby"),
    Weeble.new("Oscar",   27, 90_000, "ruby"),
    Weeble.new("Paul",    27, 60_000, "perl"),
    Weeble.new("Quentin", 27, 60_000, "python"),
    Weeble.new("Ryan",    27, 80_000, "ruby"),
    Weeble.new("Steve",   27, 80_000, "ruby"),
    Weeble.new("Titus",   27, 90_000, "ruby")
  ]

sort_block = Proc.new do |a,b| 
                        if    0 != (comp = ((a.age || 0) <=> (b.age || 0)))
                          comp
                        elsif 0 != (comp = ((a.salary || 0) <=> (b.salary || 0)))
                          comp
                        elsif 0 != (comp = ((a.language || "") <=> (b.language || "")))
                          comp
                        else
                          ((a.name || "") <=> (b.name || ""))
                        end
                      end

bm(16) do |t|
  t.report("sort")          { 10_000.times { weebles.sort { |a,b| a.sorter <=> b.sorter } } }
  t.report("sort_by")       { 10_000.times { weebles.sort_by { |w| w.sorter } } }
  t.report("sort block")    { 10_000.times { weebles.sort(&sort_block) } }
end