Permalink
Find file
Fetching contributors…
Cannot retrieve contributors at this time
30 lines (27 sloc) 958 Bytes
# frozen_string_literal: true
class Object
# Returns true if this object is included in the argument. Argument must be
# any object which responds to +#include?+. Usage:
#
# characters = ["Konata", "Kagami", "Tsukasa"]
# "Konata".in?(characters) # => true
#
# This will throw an +ArgumentError+ if the argument doesn't respond
# to +#include?+.
def in?(another_object)
another_object.include?(self)
rescue NoMethodError
raise ArgumentError.new("The parameter passed to #in? must respond to #include?")
end
# Returns the receiver if it's included in the argument otherwise returns +nil+.
# Argument must be any object which responds to +#include?+. Usage:
#
# params[:bucket_type].presence_in %w( project calendar )
#
# This will throw an +ArgumentError+ if the argument doesn't respond to +#include?+.
#
# @return [Object]
def presence_in(another_object)
in?(another_object) ? self : nil
end
end