我很好奇send
和public_send
有什么区别。例如:
class Klass
def hello(*args)
"Hello " + args.join(' ')
end
end
k = Klass.new
k.send :hello, "gentle", "readers" #=> "Hello gentle readers"
k.public_send :hello, "gentle", "readers" #=> "Hello gentle readers"
最佳答案
Unlike send, public_send calls public methods only.
例子:
class Klass
private
def private_method
puts "Hello"
end
end
k = Klass.new
k.send(:private_method)
# => "Hello"
k.public_send(:private_method)
# => `public_send': private method `private_method' called for #<Klass:0x007f5fd7159a80> (NoMethodError)
您可能希望使用 #public_send
而不是 #send
,以免规避私有(private)/ protected 可见性。
关于ruby - Ruby 的 send 和 public_send 方法有什么区别?,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/30401970/