Re^3: Functional Programming & method rewriting

Nope, they close very briefly around @args, as wrong as that is, they do. Whether they are used once or twice or thrice is indifferent to the fact that @args is lexically picked up.

Comment on Re^3: Functional Programming & method rewriting

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Re^4: Functional Programming & method rewriting by revdiablo (Prior) on Oct 29, 2004 at 19:07 UTC
That's true, but if you used that as the definition of "closure", then every subroutine that is in a lexical environment is a closure. That makes the term practically useless. I think it's more useful to consider a closure to be a subroutine that closes around its lexical environment, and uses it to maintain state between invocations. It may not be as technically accurate, but it captures the meaning I think is most common, and definitely more useful.	[reply]

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Re^4: Functional Programming & method rewriting
by revdiablo (Prior) on Oct 29, 2004 at 19:07 UTC

That's true, but if you used that as the definition of "closure", then every subroutine that is in a lexical environment is a closure. That makes the term practically useless.

I think it's more useful to consider a closure to be a subroutine that closes around its lexical environment, and uses it to maintain state between invocations. It may not be as technically accurate, but it captures the meaning I think is most common, and definitely more useful.

[reply]