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Versions: 147
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Stored size: 713 Bytes
Contents
# frozen_string_literal: true
class Object
# A duck-type assistant method. For example, Active Support extends Date
# to define an <tt>acts_like_date?</tt> method, and extends Time to define
# <tt>acts_like_time?</tt>. As a result, we can do <tt>x.acts_like?(:time)</tt> and
# <tt>x.acts_like?(:date)</tt> to do duck-type-safe comparisons, since classes that
# we want to act like Time simply need to define an <tt>acts_like_time?</tt> method.
def acts_like?(duck)
case duck
when :time
respond_to? :acts_like_time?
when :date
respond_to? :acts_like_date?
when :string
respond_to? :acts_like_string?
else
respond_to? :"acts_like_#{duck}?"
end
end
end
Version data entries
147 entries across 138 versions & 16 rubygems