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Benx Shen's personal annotations on this page

benxshen
Benxshen bookmarked on 2009-10-24 
  •   class Strawberry
         def Strawberry.color
           return "red"
         end

         def self.size
           return "kinda small"
         end

         class << self
           def shape
             return "strawberry-ish"
           end
         end
       end
       Strawberry.color # -> "red"
       Strawberry.size  # -> "kinda small"
       Strawberry.shape # -> "strawberry-ish"

    Note the three different constructions: ClassName.method_name and self.method_name are essentially the same - outside of a method definition in a class block, self refers to the class itself. The latter is preferred, as it makes changing the name of the class much easier. The last construction, class << self, puts us in the context of the class's "meta-class" (sometimes called the "eigenclass")

This link has been bookmarked by 1 people . It was first bookmarked on 24 Oct 2009, by Benx Shen.

  • 24 Oct 09
    benxshen
    Benx Shen 
    •   class Strawberry
           def Strawberry.color
             return "red"
           end

           def self.size
             return "kinda small"
           end

           class << self
             def shape
               return "strawberry-ish"
             end
           end
         end
         Strawberry.color # -> "red"
         Strawberry.size  # -> "kinda small"
         Strawberry.shape # -> "strawberry-ish"

      Note the three different constructions: ClassName.method_name and self.method_name are essentially the same - outside of a method definition in a class block, self refers to the class itself. The latter is preferred, as it makes changing the name of the class much easier. The last construction, class << self, puts us in the context of the class's "meta-class" (sometimes called the "eigenclass")