词汇：object
n. 宾语；客体；目标；物体
相关场景
- 31. eval; instance_eval定义的是单例方法；:
- def glass_case_of_emotion x="I'm in a " + __method__.to_s.tr('_',' ') binding; binding 可以获得当前的临时域并把这个临时域封装到Binding对象中作为返回结果。这个指定的上下文是eval方法的第二个参数； eval("x", glass_case_of_emotion); class_eval很像是重新打开类，实际上是被定义在Module里面，only被模块和类使用。= moudle_eval; instance_eval访问实例变量；class_eval定义实例方法。 class Widget attr_accessor(:name, :quantity) def initialize(&block) instance_eval(&block) if block end ;;; w= Widget.new do |widget| widget.name= "Elbow Grease" ; @quantity = 0; end ; instance_exec, class_exec, moudle_exec; only accept 代码块， no string； object.instance_eval("@#{name} = DEFAULT")
module Reset def self.reset_var (object, name) object.instance_exec("@#{name}.to_sym") do |var| const = self.class.const_get(:DEFAULT); instance_variable_set(var, const) end ...>> Effective Ruby- 30.define_method or method_missing:
- 如果没有找到任何方法，method_missing就会被执行；但是因为又super的原因，这里会有迷惑。def method_missing(name, *args, &block) if @hash.respond_to?(name) @hash.send(name, *args, &block) else super end end; Hash.public_instance_methods(false).each do |name| define_method(name) do |*args, &block| @hash.send(name, *args, &block) end; h.public_methods(false).sort.take(5); 实现了Hash的方法。
AuditDecorator @logger = Logger.new($stdout); private def method_messing(name, *arg, &block) @logger.info("calling '#{name}' on #{@object.inspect}"); @object.send(name, *args, &block); define_method更加适合做这个了。 mod=Module.new do object.public_methods.each do |name| define_method(name) do |*args, &block| @logger.info("") @object.send(name, *args, &block) end end end extend(mod) ; 创建了一个匿名的模块。 —— define_method恢复了内省方法。。 respond_to? and respond_to_missing?>> Effective Ruby- 11.namespace:
- 定义类和打开修改类是一种写法，ruby里的类是可以修改的。命名空间是一种保证常量唯一性的方式。module Notebooks; sytle= Notebooks::Binding.new； ::Array 和 Cluster::Array 是不同的；Object::Array === ::Array; 命名空间就是为了程序之间的和平相处。>> Effective Ruby
- 6.Object:
- 对象是变量的容器，称为实例变量，并代表对象的状态，特殊内部变量-连接唯一的类；类是方法和常量的容器，是它的所有实例的方法。 超类就是类的父类，有特殊变量跟踪超类。模块和类的区别是模块没有new方法；单例类。。。再定义类的方法self..会生成一个匿名的类在实例的链条上.
BasicObject> Kernel> Object >SomeModuleInPerson > Person > Customer.
Customer.singleton_class.instance_methods(false) 查看单例类。
Customer.superclass; Customer.ancestors; Customer.included_modules;>> Effective Ruby- As you can see here, there is now a full WYSIWYG interface for creating the body. It comes with a default set of styles for the toolbar, you can change those, those styles are generated straight into your application, so you can make it look nice for yourself. Let's give some bold and italic text here, you see, that was all that was needed. but I think what's even nicer to look at here is if we do an upload and we add a file, you will see that file gets added with a preview directly to the WYSIWYG editor. And if we save that and we update the post, it is added to the post itself. And that then went through the whole process of doing a direct upload of the file when we dropped it into the editor, that uploads it straight to active storage. And then, we have access to that, and rendering it directly from whatever storage backend active storage is using. In this example , we're just storing on disk, but you could be storing your active storage in S3 or another object storage.>> Rails 8.0.1 You are in good company
- If we jump into the post model, you'll see there's actually nothing here. Everything in the post model is made available through introspection. So, a new post model will look at the schema for that table, and it will know that there is a title and there is a body, and we can access that title and that body directly through this post object.>> Rails 8.0.1 You are in good company
- He said that someone might be spying on the station and the pilot was ordered to keep track of the strange object.>> 91-Three Men in a Basket
- the commanding officer; a Royal Air Force station; he informed the station at once. spy on the station; keep track of the strange object. circle the balloon ;>> 91-Three Men in a Basket
- Last, three young Poles, carrying long objects wrapped in newspaper.>> 钢琴家 The Pianist Movie Script
- INT. WAREHOUSE - DAY Szpilman and the others bring their piles of things into the warehouse, which is crammed with similar objects, an Aladdin's cave.>> 钢琴家 The Pianist Movie Script
- But technical stuff about java, about programming, about DevOps, about computers having in mind that majority of those books are written by people who don't have English as a first language, like myself, Elegant objects is written in English, even though it's not my first language.
但是，关于java、编程、DevOps和计算机的技术知识——请记住，这些书中的大多数都是由像我这样没有英语作为第一语言的人写的，Elegant对象是用英语写的.>> You don't need perfect- It is already published in Russian and it will be published in other languages and people sometimes keep asking me where I can find a localized version of Elegant objects and I point them to Russian shops and they go there and buy.>> You don't need perfect
- Recommendation number one,:
- I read technical books only in English, about object-oriented programming, software development, design, DevOps, everying, you can ,of course find them in translated versions. Like you can find a translated version of Elegant objects, my book.>> You don't need perfect
- Address enclosed... and a list of... the above-mentioned objects.>> 邮差 Postino Il Movie Script
- Dear Sir... I ask you to send me... some objects belonging to... signor Pablo Neruda... which are to be found in the house where he lived... during his... stay in Italy.>> 邮差 Postino Il Movie Script
- A poet needs to know the object of his inspiration!>> 邮差 Postino Il Movie Script
- Surprisingly, she calmly places the massice stone in the palm of his hand, while still holding onto the necklace. Lovett gazes at the object of his quest. An infinity of cold scalpels glint in its blue depths. It is mesmerizing. It fits in his hand just like he imagined.>> 泰坦尼克号 Titanic (1997) Movie Script
- Hundreds of passengers, clinging to every fixed object on deck, huddle on their knees around FATHER BYLES, who has his voice raised in prayer. They are praying, sobbing, or just staring at nothing, their minds blank with dread.>> 泰坦尼克号 Titanic (1997) Movie Script
- ISMAY (V.O.) She is the largest moving object ever made by the hand of man in all history...>> 泰坦尼克号 Titanic (1997) Movie Script
- Laid out on a worktable are fifty or so objects, from mundane to valuable.>> 泰坦尼克号 Titanic (1997) Movie Script
- ON THE SCREEN, in the glare of the lights, is the object of their quest: a small STEEL COMBINATION SAFE.>> 泰坦尼克号 Titanic (1997) Movie Script
- Lewis grips a wardrobe door, lying at an angle in a corner, and pulls it with Snoop's gripper. It moves reluctantly in a cloud of silt. Under it is a dark object. The silt clears and Snoop's cameras show them what was under the door...>> 泰坦尼克号 Titanic (1997) Movie Script
- Bodine is watching the sidescan sonar display, where the outline of a huge pointed object is visible. Anatoly lies prone, driving the sub, his face pressed to the center port.>> 泰坦尼克号 Titanic (1997) Movie Script
- Um, this power began the night that you saw the object in the sky?>> 不一样的本能 Phenomenon （1996）Movie Script
- Does any man here object to the nuptials?>> Pirates of the Caribbean: Dead Men Tell No Tales加勒比海盗5：死无对证 Movie Script