hook是個(gè)什么東西?干什么用的?
exercise/pre-hook = {code} (initially empty)
The code for the pre exercise hook for exercises of the type “exercise”.
exercise/begin-hook = {code} (initially empty)
The code for the begin exercise hook for exercises of the type “exercise”.
exercise/end-hook = {code} (initially empty)
The code for the end exercise hook for exercises of the type “exercise”.
exercise/post-hook = {code} (initially empty)
The code for the post exercise hook for exercises of the type “exercise”.
這四個(gè)命令是干什么的?有什么作用?
solution環(huán)境也有這四個(gè)命令.
