Програмиране с Ruby

Курс във Факултета по Математика и Информатика към СУ

Решение на Втора задача от Цветан Иванов

Обратно към всички решения

Към профила на Цветан Иванов

Резултати

  • 6 точки от тестове
  • 0 бонус точки
  • 6 точки общо
  • 22 успешни тест(а)
  • 0 неуспешни тест(а)

Код

class TodoList
include Enumerable
attr_accessor :collection
def initialize(collection = [])
@collection = collection
end
def self.parse(text)
rows = text.lines.map { |row| row.split("|").map(&:strip) }
todos = rows.map do |status, description, priority, tags|
ToDo.new(status, description, priority, tags)
end
TodoList.new(todos)
end
def filter(criteria)
filtered_todo_list = @collection.select do |todo|
criteria.filter_criteria todo
end
TodoList.new(filtered_todo_list)
end
def each
collection.each{ |todo| yield todo }
end
def adjoin(other)
TodoList.new(collection.concat other.collection)
end
def tasks_todo
count { |todo| todo.status == :todo }
end
def tasks_in_progress
count { |todo| todo.status == :current }
end
def tasks_completed
count { |todo| todo.status == :done }
end
def completed?
all? { |todo| todo.status == :done }
end
end
class ToDo
def initialize(status, description, priority, tags)
@status = status.downcase.to_sym
@description = description
@priority = priority.downcase.to_sym
@tags = tags.split(",").map(&:strip)
end
def status
@status
end
def description
@description
end
def priority
@priority
end
def tags
@tags
end
end
class Criteria
def self.status(status)
StatusCriteria.new(status)
end
def self.priority(current_priority)
PriorityCriteria.new(current_priority)
end
def self.tags(tags)
TagsCriteria.new(tags)
end
def |(other)
Disjunction.new self, other
end
def &(other)
Conjunction.new self, other
end
def !
Negation.new self
end
end
class StatusCriteria < Criteria
def initialize(status)
@status = status
end
def filter_criteria(todo)
todo.status == @status
end
end
class PriorityCriteria < Criteria
def initialize(priority)
@priority = priority
end
def filter_criteria(todo)
todo.priority == @priority
end
end
class TagsCriteria < Criteria
def initialize(tags)
@tags_criteria = tags
end
def filter_criteria(todo)
@tags_criteria.all? { |tag| todo.tags.include? tag }
end
end
class Disjunction < Criteria
def initialize(first, second)
@first = first
@second = second
end
def filter_criteria(todo)
@first.filter_criteria todo or @second.filter_criteria todo
end
end
class Conjunction < Criteria
def initialize(first, second)
@first = first
@second = second
end
def filter_criteria(todo)
@first.filter_criteria todo and @second.filter_criteria todo
end
end
class Negation < Criteria
def initialize(first)
@first = first
end
def filter_criteria(todo)
not @first.filter_criteria todo
end
end

Лог от изпълнението

......................

Finished in 0.04036 seconds
22 examples, 0 failures

История (1 версия и 0 коментара)

Цветан обнови решението на 06.11.2013 12:55 (преди около 11 години)

+class TodoList
+ include Enumerable
+ attr_accessor :collection
+
+ def initialize(collection = [])
+ @collection = collection
+ end
+
+ def self.parse(text)
+ rows = text.lines.map { |row| row.split("|").map(&:strip) }
+ todos = rows.map do |status, description, priority, tags|
+ ToDo.new(status, description, priority, tags)
+ end
+
+ TodoList.new(todos)
+ end
+
+ def filter(criteria)
+ filtered_todo_list = @collection.select do |todo|
+ criteria.filter_criteria todo
+ end
+
+ TodoList.new(filtered_todo_list)
+ end
+
+ def each
+ collection.each{ |todo| yield todo }
+ end
+
+ def adjoin(other)
+ TodoList.new(collection.concat other.collection)
+ end
+
+ def tasks_todo
+ count { |todo| todo.status == :todo }
+ end
+
+ def tasks_in_progress
+ count { |todo| todo.status == :current }
+ end
+
+ def tasks_completed
+ count { |todo| todo.status == :done }
+ end
+
+ def completed?
+ all? { |todo| todo.status == :done }
+ end
+end
+
+class ToDo
+ def initialize(status, description, priority, tags)
+ @status = status.downcase.to_sym
+ @description = description
+ @priority = priority.downcase.to_sym
+ @tags = tags.split(",").map(&:strip)
+ end
+
+ def status
+ @status
+ end
+
+ def description
+ @description
+ end
+
+ def priority
+ @priority
+ end
+
+ def tags
+ @tags
+ end
+end
+
+class Criteria
+ def self.status(status)
+ StatusCriteria.new(status)
+ end
+
+ def self.priority(current_priority)
+ PriorityCriteria.new(current_priority)
+ end
+
+ def self.tags(tags)
+ TagsCriteria.new(tags)
+ end
+
+ def |(other)
+ Disjunction.new self, other
+ end
+
+ def &(other)
+ Conjunction.new self, other
+ end
+
+ def !
+ Negation.new self
+ end
+end
+
+class StatusCriteria < Criteria
+ def initialize(status)
+ @status = status
+ end
+
+ def filter_criteria(todo)
+ todo.status == @status
+ end
+end
+
+class PriorityCriteria < Criteria
+ def initialize(priority)
+ @priority = priority
+ end
+
+ def filter_criteria(todo)
+ todo.priority == @priority
+ end
+end
+
+class TagsCriteria < Criteria
+ def initialize(tags)
+ @tags_criteria = tags
+ end
+
+ def filter_criteria(todo)
+ @tags_criteria.all? { |tag| todo.tags.include? tag }
+ end
+end
+
+class Disjunction < Criteria
+ def initialize(first, second)
+ @first = first
+ @second = second
+ end
+
+ def filter_criteria(todo)
+ @first.filter_criteria todo or @second.filter_criteria todo
+ end
+end
+
+class Conjunction < Criteria
+ def initialize(first, second)
+ @first = first
+ @second = second
+ end
+
+ def filter_criteria(todo)
+ @first.filter_criteria todo and @second.filter_criteria todo
+ end
+end
+
+class Negation < Criteria
+ def initialize(first)
+ @first = first
+ end
+
+ def filter_criteria(todo)
+ not @first.filter_criteria todo
+ end
+end