A question about thunkify

[jerrygg19930312]

Hi tj,I 'm new to nodejs.I don't know the function named done where transfer.I have been very confused

[Equim-chan]

"done" is actually the callback argument of the original function; it's called usually when the async process is done.

[chengling-cl]

hello, tj,
I could not understand the reason for adding script if (called) return;.
what is the condition that args.push() run twice or more ?