ObjectSpace

Returns all the classes in the object space. Optionally, a block can be passed, for example the following code would return the classes that start with the character "A":

ObjectSpace.classes do |klass|
  if klass.to_s[0] == "A"
    klass
  end
end

# File lib/padrino-core/support_lite.rb, line 125
def classes(&block)
  rs = Set.new

  ObjectSpace.each_object(Class).each do |klass|
    if block
      if r = block.call(klass)
        # add the returned value if the block returns something
        rs << r
      end
    else
      rs << klass
    end
  end

  rs
end

Returns a list of existing classes that are not included in "snapshot" This method is useful to get the list of new classes that were loaded after an event like requiring a file. Usage:

snapshot = ObjectSpace.classes
# require a file
ObjectSpace.new_classes(snapshot)

# File lib/padrino-core/support_lite.rb, line 152
def new_classes(snapshot)
  self.classes do |klass|
    if !snapshot.include?(klass)
      klass
    end
  end
end