Op 25-09-17 om 14:24 schreef Steve D'Aprano: > On Mon, 25 Sep 2017 08:05 pm, Antoon Pardon wrote: > >> Pass by reference doesn't imply being able to >> write a swap function. > Really. Do you have a counter-example?
Python, smalltalk, scheme. > > >> A swap function as possible in pascal requires two conditions. >> >> 1) Pass by reference >> 2) Copy-over assignment. > I don't know what you think "copy-over assignment" means, but none of > DuckDuckGo, Google, Bing or Yahoo finds that term except in your post. I think it was clear enough that I was talking about the assignment semantics like in Pascal, where when you assign to a variable the value in the entity refered to, is overwritten by a new value. In contrast with assignments in Python, smalltalk, scheme where the assignment binds the name/variable to a new entity. -- Antoon Pardon. -- https://mail.python.org/mailman/listinfo/python-list
