From: "Jan E." <lists@...>
Date: 2012-03-29T23:00:57+09:00
Subject: Re: Why z = Complex(1,2) rather than z = Complex.new(1,2)?

Hi,

You *can* define upper-case methods, but when you call them, you always 
have to use parenthesis so that Ruby doesn't confuse them with 
constants:

####
def Hallo
  puts 'Hallo Welt!'
end

Hallo()
####

However, this violates the naming conventions of Ruby, so you shouldn't 
do it. Why not define a [] method?

####
class MyClass
  def initialize value
    @value = value
  end
  attr_reader :value
  def self.[] value
    new value
  end
end

a = MyClass[4]
puts a.value
####

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