[每日见闻-2017-07-20]关于self的小细节 - Githubissues

xiaohesong / TIL

本库记录每日所学，README是一些链接；学习是自己的事。

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[每日见闻-2017-07-20]关于self的小细节 #3

Closed xiaohesong closed 6 years ago

xiaohesong commented 7 years ago

self在当前的initialize中直指当前的实例对象

class Foo
def initialize(x)
self.c x
end

def c(x)
puts "c的参数是#{x}"
end
end
f = Foo.new(1)

带给我的感觉 self在很大程度上类似.都是指定当前的实例.给我的感觉就是
```
self == @
!self.eql?(@)
```
类似于coffee js的
```
this && @
```
例如:
```
class Foo
attr_accessor :name
def initialize(x)
@name = "wo"
end
end
```

class Foo attr_accessor :name def initialize(x) self.name = "wo" end end

f = Foo.new(3) puts f.name


再比如
```ruby
class A
  @num = 8
  def show
    puts @num
  end
end

class B < A
  def initialize
    @num = 3
  end
end

b = B.new
b.show

xiaohesong commented 7 years ago

在线学习网站,温故而知新