Pass-by-reference : Could a C#-like approach work in Python?
Duncan Booth
duncan at NOSPAMrcp.co.uk
Fri Sep 12 05:24:48 EDT 2003
Michael Chermside <mcherm at mcherm.com> wrote in
news:mailman.1063300996.11325.python-list at python.org:
> I started by looking for use cases... where would this proposed
> pass-by-reference actually prove useful? Stephen basically found
> one good use case:
>
> I wish to "transfer ownership" of an object that gets passed
> into a method call, and protect against the caller accidently
> continuing to use the object. [So, we'll use a "ref" parameter and
> set the caller's variable to None.]
That only works if the caller hasn't assigned that object to any other
variables. If they have, they can still accidentally continue to use the
object. Since you have to trust the caller anyway, why not trust them to
stop using the object?
--
Duncan Booth duncan at rcp.co.uk
int month(char *p){return(124864/((p[0]+p[1]-p[2]&0x1f)+1)%12)["\5\x8\3"
"\6\7\xb\1\x9\xa\2\0\4"];} // Who said my code was obscure?
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