Rubinius无法识别File类中的方法

Question

I have a project that has alot of file manipulation. I am trying out Rubinius because I need to be able to compile the code. When I try to run code that includes

if Dir.exist?(file_path)

I get this error:

NoMethodError: undefined method `exist?' on Dir (Class)

Is there something I need to include to get this recognized? Btw, I have also tried Dir.exists? since it is an alias, and that didn't work either. Is the issue that this method didn't exist in 1.8.7? I can't seem to find a list of

Answer 1

问题是Rubinius正在使用1.8.7，而这种方法当时并不存在。