#6 Shortcut Blocks with Symbol to_proc

2019独角兽企业重金招聘Python工程师标准>>>

def self.all_names
  find(:all).collect{|obj| obj.name }
end

#优化

def self.all_names
  find(:all).collect(&:name)
end

转载于:https://my.oschina.net/themorecolor/blog/129090