This is a difficult problem, I try to make a long story short



As shown in figure in the list. The append add yourself while no error, the result will be in this way,



But if the append other list the problem clearly not


Some people say that the list is the key word, so write illegal





The ghost is still like...

I want to check the source code, haven't had time to worry about can read, hair root root can't find...

The good bosses, if you can help me to answer or give me a source address, little people appreciate!!!!!!

CodePudding user response:

Imagination is great, you learn the programming for so many years, I haven't thought so since the cycle,??????

CodePudding user response:

Ruby is also such, however, this itself from the cycle structure is also hard for computer ha ha, so can only display [...]. Said the cycle, otherwise how you want it show,