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module ActiveScaffold::DataStructures
class Set
include Enumerable
include ActiveScaffold::Configurable
def initialize(*args)
set_values(*args)
end
def initialize_dup(other)
@set = other.set.dup
end
def set_values(*args)
@set = []
add(*args)
end
# the way to add items to the set.
def add(*args)
args.flatten! # allow [] as a param
args.each do |arg|
arg = arg.to_sym if arg.is_a? String
@set << arg unless @set.include? arg # avoid duplicates
end
end
alias << add
# the way to remove items from the set.
def exclude(*args)
args.flatten! # allow [] as a param
args.collect!(&:to_sym) # symbolize the args
# check respond_to? :to_sym, ActionColumns doesn't respond to to_sym
@set.reject! { |c| c.respond_to?(:to_sym) && args.include?(c.to_sym) } # reject all items specified
end
alias remove exclude
# returns an array of items with the provided names
def find_by_names(*names)
@set.find_all { |item| names.include? item }
end
# returns the item of the given name.
def find_by_name(name)
# this works because of `def item.=='
@set.find { |c| c == name }
end
alias [] find_by_name
def each(&block)
@set.each(&block)
end
# returns the number of items in the set
def length
@set.length
end
def empty?
@set.empty?
end
def +(other)
self.class.new(@set, *other)
end
protected
attr_reader :set
end
end
Version data entries
6 entries across 6 versions & 1 rubygems