Flo

#!/usr/bin/env ruby

flo = [ "dividuum", "syb", "fiji", "flowhase" ]

# flos sind keine arrayss1!
for i in 0..3
  eval "flo#{i} = flo[#{i}]"
  puts "flo#{i} == \"" + eval("flo#{i}") + "\""
end

Dieses Perl (*duck*) kann ja keiner lesen!

Stimmt doch gar nicht! Ist ganz einfach:

map printf("%s = %s\n", [flo0..flo3]->[$_], [dividuum, syb, fiji, flowhase]->[$_]), 0..$#{@{[flo0..flo3]}};

Und auch in python kann man Einzeiler schreiben:

print "\n".join(["%s = %s" % (k, v) for k, v in {"flo0":"dividuum", "flo1":"syb", "flo2":"fiji", "flo3":"flowhase"}.items()])

(eval-when (:compile-toplevel :load-toplevel :execute)
  (defvar *flo-sequence* #("dividuum" "syb" "fiji" "flowhase")))

(defmacro make-individual-flo-variables ()
  (cons 'progn
        (loop for flo across *flo-sequence*
              for i from 0
              collect `(defvar ,(read-from-string (format nil "*flo~d*" i)) ,flo))))

(make-individual-flo-variables)

(dotimes (i 4)
    (format t "~&flo~d = ~a" i (eval (read-from-string (format nil "*flo~d*" i)))))

Und nun nochmal Ruby mit viel bloatigem Metaprogramming-Foo

#!/usr/bin/env ruby
class Flo
  def self.metaclass; class << self; self; end; end
  def self.traits(*arr)
    return @traits if arr.empty?
    attr_accessor *arr
    arr.each do |a|
      metaclass.instance_eval do
        define_method( a ) do |val|
          @traits ||= {}
          @traits[a] = val
        end
      end
    end
    class_eval do
      define_method( :initialize ) do
        self.class.traits.each do |k,v|
          instance_variable_set("@#{k}", v)
        end
      end
    end
  end

  traits :name, :skill, :notebook

  def to_s
    s = "#{self.class} is actually #{self.name} and is good at #{self.skill}\n\tHe loves hacking on his #{self.notebook}"
  end
end

class Flo0 < Flo
  name "dividuum"
  skill "DOOM"
  notebook "old Dell"
end

class Flo1 < Flo
  name "Peter"
  skill "math"
  notebook "IBM Thinkpad"
end
class Flo2 < Flo
  name "Fiji"
  skill "WOW"
  notebook "i have no idea"
end

class Flo3 < Flo
  name "flowhase"
  skill "hoppeln"
  notebook "hasIbook"
end

a = [ Flo0.new, Flo1.new, Flo2.new, Flo3.new ]
a.each { |f| puts f }