Програмиране с Ruby

Курс във Факултета по Математика и Информатика към СУ

Решение на Втора задача от Любомир Ятански

Обратно към всички решения

Към профила на Любомир Ятански

Резултати

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

Код

class Collection
include Enumerable
def initialize collection
@collection = collection
end
def Collection.parse text
songs = []
text.split(/^[\s]*$\n/).each { |song| songs << Song.new(song) }
Collection.new songs
end
def each &block
@collection.each{ |member| block.call member }
end
def filter criteria
Collection.new select { |song| criteria.call song }
end
def adjoin collection
Collection.new zip(collection).flatten.compact
end
def names
@collection.map { |song| song.name }.uniq
end
def artists
@collection.map { |song| song.artist }.uniq
end
def albums
@collection.map { |song| song.album }.uniq
end
end
class Song
def initialize text
@song_data = text
end
def name
@song_data.split("\n")[0]
end
def artist
@song_data.split("\n")[1]
end
def album
@song_data.split("\n")[2]
end
end
class Criteria
def initialize criteria
@criteria = criteria
end
def & other
Criteria.new proc { |song| @criteria.call(song) and other.call(song) }
end
def | other
Criteria.new proc { |song| @criteria.call(song) or other.call(song) }
end
def !
Criteria.new proc { |song| not @criteria.call song }
end
def call song
@criteria.call song
end
def Criteria.name name
Criteria.new proc { |song| name == song.name }
end
def Criteria.artist artist
Criteria.new proc { |song| artist == song.artist }
end
def Criteria.album album
Criteria.new proc { |song| album == song.album }
end
end

Лог от изпълнението

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Finished in 0.01053 seconds
11 examples, 0 failures

История (1 версия и 0 коментара)

Любомир обнови решението на 31.10.2012 02:45 (преди около 12 години)

+class Collection
+ include Enumerable
+
+ def initialize collection
+ @collection = collection
+ end
+
+ def Collection.parse text
+ songs = []
+ text.split(/^[\s]*$\n/).each { |song| songs << Song.new(song) }
+ Collection.new songs
+ end
+
+ def each &block
+ @collection.each{ |member| block.call member }
+ end
+
+ def filter criteria
+ Collection.new select { |song| criteria.call song }
+ end
+
+ def adjoin collection
+ Collection.new zip(collection).flatten.compact
+ end
+
+ def names
+ @collection.map { |song| song.name }.uniq
+ end
+
+ def artists
+ @collection.map { |song| song.artist }.uniq
+ end
+
+ def albums
+ @collection.map { |song| song.album }.uniq
+ end
+end
+
+class Song
+ def initialize text
+ @song_data = text
+ end
+
+ def name
+ @song_data.split("\n")[0]
+ end
+
+ def artist
+ @song_data.split("\n")[1]
+ end
+
+ def album
+ @song_data.split("\n")[2]
+ end
+end
+
+class Criteria
+ def initialize criteria
+ @criteria = criteria
+ end
+
+ def & other
+ Criteria.new proc { |song| @criteria.call(song) and other.call(song) }
+ end
+
+ def | other
+ Criteria.new proc { |song| @criteria.call(song) or other.call(song) }
+ end
+
+ def !
+ Criteria.new proc { |song| not @criteria.call song }
+ end
+
+ def call song
+ @criteria.call song
+ end
+
+ def Criteria.name name
+ Criteria.new proc { |song| name == song.name }
+ end
+
+ def Criteria.artist artist
+ Criteria.new proc { |song| artist == song.artist }
+ end
+
+ def Criteria.album album
+ Criteria.new proc { |song| album == song.album }
+ end
+end