On Tuesday 15 November 2016 07:04, ojacob...@heroku.com wrote: > On Monday, November 14, 2016 at 12:21:00 AM UTC-5, Steven D'Aprano wrote: > >> Don't tell me to make SPAMIFY a parameter of the function. I know that. >> That's what I would normally do, but *occasionally* it is still useful to >> have a global configuration setting, and those are the cases I'm talking >> about. > > This is the motivation behind Racket's parameters system > <http://docs.racket-lang.org/reference/parameters.html>. A _parameter_ has > the following properties: [snip] > Parameterizing a call means that changes to the "global variables" > implemented as parameters have predictable scope and can be reliably restored > to their prior values, meaning they're a fairly safe way to implement > "config" globals.
Sounds more like Python's "with" syntax and context managers, but I'll have a read over it the docs and see. -- Steven 299792.458 km/s — not just a good idea, it’s the law! -- https://mail.python.org/mailman/listinfo/python-list
