duncanbeevers' dweebd » Day-of-week Predicates

Day-of-week Predicates

When business logic dictates that something only happens on Saturday, this snippet can help keep your code and tests legible.

module DatePredicates
  Date::DAYNAMES.each_with_index do |day_name, i|
    define_method "#{day_name}?" do i == wday end
  end
end
 
class Date
  include DatePredicates
end

Date.today.Tuesday?
=> true

June 23rd, 2009

One Comment

Jeremy Voorhis
I’d prefer to have the methods begin with a lower-case letter. This is grammatically correct, but I’ll probably misspell these the first couple of times.

June 23rd, 2009

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