为什么切片带有负位置值的方法在Ruby中无法正常工作? [英]Why doesn't slicing with negative position values work as expected in Ruby?
直到刷新页面,Ruby on Rails send_file才起作用? [英]Ruby on Rails send_file doesn't work until i refresh the page?
试图了解Ruby中的线程。 测试代码无法正常工作,为什么? [英]Trying to understand Threading in Ruby. Test Code doesn't work as expected, why?