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于 2012-7-6 14:50, steve donovan 写道:

The short answer: require() is like dofile(), in that the source is
separately compiled, but it looks up the source on the _module path_.

steve d.

and what's more, `require' will load a chunk only once:

the first time you `require' some module, it load the chunk,
and caches the result (or simply a `true' if no result)

all subsequent call to `require' will return the cached value.