Програмиране с Ruby

Курс във Факултета по Математика и Информатика към СУ

Решение на Втора задача от Ивайло Сачански

Обратно към всички решения

Към профила на Ивайло Сачански

Резултати

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

Код

class Song
attr_reader :name
attr_reader :artist
attr_reader :genre
attr_reader :subgenre
attr_reader :tags
def initialize attributes
@name = if attributes[0] != nil then attributes[0].strip end
@artist = if attributes[1] != nil then attributes[1].strip end
@genre = if attributes[2] != nil then (attributes[2].split ",") [0].strip end
@subgenre = if attributes[2] != nil then (attributes[2].split ",") [1] end
if @subgenre != nil then @subgenre.strip! end
if @genre != nil then @tags = Array (@genre.downcase) end
if @subgenre != nil then @tags << @subgenre.downcase.strip end
if attributes[3] != nil
(attributes[3].split ",").each { |tag| @tags << tag.strip }
end
end
def matchesCriteria? criteria
all_tags = Array(criteria[:tags])
anti_tags = all_tags.map { |tag| tag.dup}.delete_if {|tag| !tag.end_with? "!"}
tags = all_tags - anti_tags
anti_tags.each { |anti_tag| anti_tag.slice! anti_tag.length - 1}
return (@tags & anti_tags == []) && (tags & @tags == tags) &&
(criteria[:name] == nil || @name == criteria[:name]) &&
(criteria[:artist] == nil || @artist == criteria[:artist]) &&
(criteria[:filter] == nil || (criteria[:filter].call (self)))
end
end
class Collection
def initialize songs_as_string, artist_tags
@songs = []
make_songs songs_as_string
add_artist_tags artist_tags
end
def find criteria
if criteria == {}
return @songs
end
result = []
@songs.each do |song|
if song.matchesCriteria? criteria
result << song
end
end
result
end
private
def make_songs songs_as_string
songs_as_string.lines do |line|
@songs << (Song.new (line.chomp.split '.'))
end
end
def add_artist_tags artist_tags
if artist_tags == nil
return
end
artist_tags.each do |k, v|
@songs.select { |song| song.artist == k }.each do |s|
v.each { |tag| s.tags << tag}
end
end
end
end

Лог от изпълнението

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

Finished in 0.54323 seconds
12 examples, 0 failures

История (1 версия и 0 коментара)

Ивайло обнови решението на 30.10.2011 23:14 (преди около 13 години)

+class Song
+ attr_reader :name
+ attr_reader :artist
+ attr_reader :genre
+ attr_reader :subgenre
+ attr_reader :tags
+ def initialize attributes
+ @name = if attributes[0] != nil then attributes[0].strip end
+ @artist = if attributes[1] != nil then attributes[1].strip end
+ @genre = if attributes[2] != nil then (attributes[2].split ",") [0].strip end
+ @subgenre = if attributes[2] != nil then (attributes[2].split ",") [1] end
+ if @subgenre != nil then @subgenre.strip! end
+ if @genre != nil then @tags = Array (@genre.downcase) end
+ if @subgenre != nil then @tags << @subgenre.downcase.strip end
+ if attributes[3] != nil
+ (attributes[3].split ",").each { |tag| @tags << tag.strip }
+ end
+ end
+
+ def matchesCriteria? criteria
+ all_tags = Array(criteria[:tags])
+ anti_tags = all_tags.map { |tag| tag.dup}.delete_if {|tag| !tag.end_with? "!"}
+ tags = all_tags - anti_tags
+ anti_tags.each { |anti_tag| anti_tag.slice! anti_tag.length - 1}
+ return (@tags & anti_tags == []) && (tags & @tags == tags) &&
+ (criteria[:name] == nil || @name == criteria[:name]) &&
+ (criteria[:artist] == nil || @artist == criteria[:artist]) &&
+ (criteria[:filter] == nil || (criteria[:filter].call (self)))
+ end
+end
+
+class Collection
+ def initialize songs_as_string, artist_tags
+ @songs = []
+ make_songs songs_as_string
+ add_artist_tags artist_tags
+ end
+
+ def find criteria
+ if criteria == {}
+ return @songs
+ end
+ result = []
+ @songs.each do |song|
+ if song.matchesCriteria? criteria
+ result << song
+ end
+ end
+ result
+ end
+
+ private
+
+ def make_songs songs_as_string
+ songs_as_string.lines do |line|
+ @songs << (Song.new (line.chomp.split '.'))
+ end
+ end
+
+ def add_artist_tags artist_tags
+ if artist_tags == nil
+ return
+ end
+ artist_tags.each do |k, v|
+ @songs.select { |song| song.artist == k }.each do |s|
+ v.each { |tag| s.tags << tag}
+ end
+ end
+ end
+end