如何在Ruby中使用动态方法重构实例方法?
我想重构这个:如何在Ruby中使用动态方法重构实例方法?,ruby,refactoring,dynamic-method,Ruby,Refactoring,Dynamic Method,我想重构这个: class Collection def artists @songs.map { |song| song.artist }.uniq end def albums @songs.map { |song| song.album }.uniq end def names @songs.map { |song| song.name }.uniq end end 变成这样: class Collection song_attribu
class Collection
def artists
@songs.map { |song| song.artist }.uniq
end
def albums
@songs.map { |song| song.album }.uniq
end
def names
@songs.map { |song| song.name }.uniq
end
end
变成这样:
class Collection
song_attributes = [:artist, :album, :name]
song_attributes.each do |song_attribute|
define_method song_attribute do
@songs.map { |song| song.public_send(song_attribute) }.uniq
end
end
end
问题出在第define\u method song\u attribute do
行中,其中song\u attribute
必须是复数。我该怎么做
我只想到了这个,但我想还有更好的办法:
song_attributes = [[:artists, :artist], [:albums, :album], [:names, :name]]
song_attributes.each do |song_attribute|
define_method song_attribute[0] do
@songs.map { |song| song.public_send(song_attribute[1]) }.uniq
end
end
把绳子传进来
.....
song_attributes = [:artist, :album, :name]
song_attributes.each do |song_attribute|
define_method("#{song_attribute}s") do
@songs.map { |song| song.public_send(song_attribute) }.uniq
end
end
.....