Ruby将上下文分配给lambda吗? [英] Ruby assign context to lambda?

问题描述

是否可以不将上下文分配给lambda?

Is it possible not to assign context to lambda?

例如:

class Rule
  def get_rule
    return lambda {puts name}
  end
end

class Person
  attr_accessor :name

  def init_rule 
    @name = "ruby"
    Rule.new.get_rule.call() # should say "ruby" but say what object of class Rull, does not have variable name
    # or self.instance_eval &Rule.new.get_rule
  end
end

我的目标是->没有上下文的存储过程对象，并在调用之前在特定位置分配上下文.有可能吗?

My target is -> stored procedure objects without contexts, and assign context before call in specific places. Is it possible?

推荐答案

是的，但是要小心一点，这个确实很容易滥用.我个人会担心这样的代码.

Yeah, but be careful with it, this one is really easy to abuse. I would personally be apprehensive of code like this.

class Rule
  def get_rule
    Proc.new { puts name }
  end
end

class Person
  attr_accessor :name

  def init_rule 
    @name = "ruby"
    instance_eval(&Rule.new.get_rule)
  end
end

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