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Contents
module Taskinator
class Tasks
include Enumerable
# implements a linked list, where each task references the next task
attr_reader :head
alias_method :first, :head
attr_reader :count
alias_method :length, :count
def initialize(first=nil)
@count = 0
add(first) if first
end
def attach(task, count)
@head = task
@count = count
task
end
def add(task)
if @head.nil?
@head = task
@count = 1
else
current = @head
while current.next
current = current.next
end
current.next = task
@count += 1
end
task
end
alias_method :<<, :add
alias_method :push, :add
def empty?
@head.nil?
end
def each(&block)
return to_enum(__method__) unless block_given?
current = @head
while current
yield current
current = current.next
end
end
def inspect
%([#{collect(&:inspect).join(', ')}])
end
end
end
Version data entries
17 entries across 17 versions & 1 rubygems