Module: IfcDateClassMethods

Included in:
IfcDate
Defined in:
lib/ifc_date/class_methods.rb

Instance Method Summary collapse

Instance Method Details

#is_leap_year?(year) ⇒ Boolean 



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# File 'lib/ifc_date/class_methods.rb', line 2

def is_leap_year?(year)
  return false unless (year % 4).zero?
  return true unless (year % 100).zero?
  (year % 400).zero?
end

#memoize(method_name) ⇒ Object

Do not execute computational expensive operations more than once. NOTE: only use for explicitly non nil return methods, false is fine



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# File 'lib/ifc_date/class_methods.rb', line 10

def memoize(method_name)
  unmemoized_name = "_unmemoized_#{method_name}"
  cache_key = method_name.end_with?('?') ? "is_#{method_name[0..-2]}" : "#{method_name}"
  alias_method unmemoized_name, method_name
  define_method method_name do |*args, &block|
    @_memoized_methods ||= {}
    return @_memoized_methods[cache_key] if @_memoized_methods.has_key?(cache_key)
    evaluated_result = send(unmemoized_name, *args, &block)
    @_memoized_methods[cache_key] = evaluated_result
  end
end