Ruby Ruby setter method returns the passed value, regardless the returned value in the method.
RT，Setter 方法返回值为传入参数。很惭愧直到今天才知道。
代码示例
class User
attr_reader :name
def name=(name)
@name = name
self
end
end
original_array = ["aaa", "bbb", "bbb"]
result = original_array.collect { |str| User.new.name = str }
puts result.inspect # => ["aaa", "bbb", "bbb"]
正确写法是
original_array.collect { |str| User.new.tap { |user| user.name = str } }
有点混乱，不明白！
class Object
def bar=(bar)
'bar'
end
end
puts self.bar = 'abc' # => 'abc'
puts self.send(:bar=, 'abc') # => 'bar'
