Програмиране с Ruby

Курс във Факултета по Математика и Информатика към СУ

Решение на Втора задача от Слав Керемидчиев

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Резултати

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

Код

class Task
attr_accessor :status, :description, :priority, :tags
def initialize(status, description, priority, *tags)
@status = status.strip.downcase.to_sym
@description = description.strip
@priority = priority.strip.downcase.to_sym
@tags = tags.first.nil? ? [] : tags.first.split(',').map(&:strip)
end
def status
@status
end
def description
@description
end
def priority
@priority
end
def tags
@tags
end
def ==(other)
status == other.status and
description == other.description and
priority == other.priority and
tags == other.tags
end
alias eql? ==
end
class Criterion
def &(other)
Conjunction.new self, other
end
def |(other)
Disjunction.new self, other
end
def !
Negation.new self
end
end
class Conjunction < Criterion
def initialize(left, right)
@left = left
@right = right
end
def met_by?(task)
@left.met_by?(task) and @right.met_by?(task)
end
end
class Disjunction < Criterion
def initialize(left, right)
@left = left
@right = right
end
def met_by?(task)
@left.met_by?(task) or @right.met_by?(task)
end
end
class Negation < Criterion
def initialize(criterion)
@criterion = criterion
end
def met_by?(task)
not @criterion.met_by?(task)
end
end
module Criteria
def self.status(description)
StatusMatches.new description
end
class StatusMatches < Criterion
def initialize(status)
@status = status
end
def met_by?(task)
task.status == @status
end
end
def self.priority(description)
PriorityMatches.new description
end
class PriorityMatches < Criterion
def initialize(priority)
@priority = priority
end
def met_by?(task)
task.priority == @priority
end
end
def self.tags(description)
TagsMatches.new description
end
class TagsMatches < Criterion
def initialize(tags)
@tags = tags
end
def met_by?(task)
@tags.all? { |tag| task.tags.include?(tag) }
end
end
end
class TodoList
include Enumerable
include Criteria
attr_accessor :tasks
def initialize(tasks)
@tasks = tasks
end
def each(&block)
@tasks.each(&block)
end
def self.parse(text)
text_modified = text.lines.map { |line| line.split('|') }
tasks = text_modified.map do |status, description, priority, tags|
Task.new status, description, priority, tags
end
new tasks
end
def adjoin(other)
adjoined_tasks = (tasks + other.tasks).uniq
TodoList.new adjoined_tasks
end
def filter(criteria)
TodoList.new @tasks.select { |task| criteria.met_by? task }
end
def tasks_todo
(filter Criteria.status(:todo)).to_a.size
end
def tasks_in_progress
(filter Criteria.status(:current)).to_a.size
end
def tasks_completed
(filter Criteria.status(:done)).to_a.size
end
def completed?
all? { |element| element.status == :done }
end
end

Лог от изпълнението

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Finished in 0.05955 seconds
22 examples, 0 failures

История (1 версия и 0 коментара)

Слав обнови решението на 05.11.2013 14:56 (преди около 11 години)

+class Task
+ attr_accessor :status, :description, :priority, :tags
+
+ def initialize(status, description, priority, *tags)
+ @status = status.strip.downcase.to_sym
+ @description = description.strip
+ @priority = priority.strip.downcase.to_sym
+ @tags = tags.first.nil? ? [] : tags.first.split(',').map(&:strip)
+ end
+
+ def status
+ @status
+ end
+
+ def description
+ @description
+ end
+
+ def priority
+ @priority
+ end
+
+ def tags
+ @tags
+ end
+
+ def ==(other)
+ status == other.status and
+ description == other.description and
+ priority == other.priority and
+ tags == other.tags
+ end
+ alias eql? ==
+end
+
+class Criterion
+ def &(other)
+ Conjunction.new self, other
+ end
+
+ def |(other)
+ Disjunction.new self, other
+ end
+
+ def !
+ Negation.new self
+ end
+end
+
+class Conjunction < Criterion
+ def initialize(left, right)
+ @left = left
+ @right = right
+ end
+
+ def met_by?(task)
+ @left.met_by?(task) and @right.met_by?(task)
+ end
+end
+
+class Disjunction < Criterion
+ def initialize(left, right)
+ @left = left
+ @right = right
+ end
+
+ def met_by?(task)
+ @left.met_by?(task) or @right.met_by?(task)
+ end
+end
+
+class Negation < Criterion
+ def initialize(criterion)
+ @criterion = criterion
+ end
+
+ def met_by?(task)
+ not @criterion.met_by?(task)
+ end
+end
+
+module Criteria
+ def self.status(description)
+ StatusMatches.new description
+ end
+
+ class StatusMatches < Criterion
+ def initialize(status)
+ @status = status
+ end
+
+ def met_by?(task)
+ task.status == @status
+ end
+ end
+
+ def self.priority(description)
+ PriorityMatches.new description
+ end
+
+ class PriorityMatches < Criterion
+ def initialize(priority)
+ @priority = priority
+ end
+
+ def met_by?(task)
+ task.priority == @priority
+ end
+ end
+
+ def self.tags(description)
+ TagsMatches.new description
+ end
+
+ class TagsMatches < Criterion
+ def initialize(tags)
+ @tags = tags
+ end
+
+ def met_by?(task)
+ @tags.all? { |tag| task.tags.include?(tag) }
+ end
+ end
+end
+
+class TodoList
+ include Enumerable
+ include Criteria
+
+ attr_accessor :tasks
+ def initialize(tasks)
+ @tasks = tasks
+ end
+
+ def each(&block)
+ @tasks.each(&block)
+ end
+
+ def self.parse(text)
+ text_modified = text.lines.map { |line| line.split('|') }
+ tasks = text_modified.map do |status, description, priority, tags|
+ Task.new status, description, priority, tags
+ end
+ new tasks
+ end
+
+ def adjoin(other)
+ adjoined_tasks = (tasks + other.tasks).uniq
+ TodoList.new adjoined_tasks
+ end
+
+ def filter(criteria)
+ TodoList.new @tasks.select { |task| criteria.met_by? task }
+ end
+
+ def tasks_todo
+ (filter Criteria.status(:todo)).to_a.size
+ end
+
+ def tasks_in_progress
+ (filter Criteria.status(:current)).to_a.size
+ end
+
+ def tasks_completed
+ (filter Criteria.status(:done)).to_a.size
+ end
+
+ def completed?
+ all? { |element| element.status == :done }
+ end
+end