假设我创建了一个包含方法的类。
class A
def test
puts 'test'
end
end
我想知道test
里面发生了什么.我想从字面上输出:
def test
puts 'test'
end
有没有办法在字符串中输出方法的源代码?
您可以使用 Pry 查看方法
# myfile.rb
require 'pry'
class A
def test
return 'test'
end
end
puts Pry::Method(A.new.method(:test)).source #(1)
# or as suggested in the comments
puts Pry::Method.from_str("A#test").source #(2)
# uses less cpu cycles than #(1) because it does not call initialize - see comments
puts Pry::Method(A.allocate.method(:test)).source #(3)
# does not use memory to allocate class as #(1) and #(3) do
puts Pry::Method(A.instance_method(:test)).source #(4)
然后运行ruby myfile.rb
,您将看到:
def test
return 'test'
end