ruby 心印 : test_sometimes_missing_parentheses_are_ambiguous

Question

我正在完成 Neo 的 Ruby Koans ( http://rubykoans.com/ )。在 about_methods.rb 中，koan 指示更正以下当前已损坏的 eval:

# (NOTE: We are Using eval below because the example code is
  # considered to be syntactically invalid).
  def test_sometimes_missing_parentheses_are_ambiguous
    eval "assert_equal (5), my_global_method (2, 3)" # ENABLE CHECK
    #
    # Ruby doesn't know if you mean:
    #
    #   assert_equal(5, my_global_method(2), 3)
    # or
    #   assert_equal(5, my_global_method(2, 3))
    #
    # Rewrite the eval string to continue.
    #
 end

我的全局方法是

def my_global_method(a,b)
  a + b
end

我需要如何更改评估才能通过此测试？

编辑:RubyKoans: broken koan?询问此代码是否已损坏，虽然它表明问题按预期工作，但没有提供 koan 的答案。

错误如下:

(eval):1: syntax error, unexpected tINTEGER, expecting keyword_do or '{' or '('    (SyntaxError)
assert_equal 5, my_global_method 2, 3

Answer 1

将其更改为:

eval "assert_equal 5, my_global_method(2, 3)"