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Groups > comp.lang.python > #101967
| From | Jussi Piitulainen <jussi.piitulainen@helsinki.fi> |
|---|---|
| Newsgroups | comp.lang.python |
| Subject | Re: How to simulate C style integer division? |
| Date | 2016-01-21 16:48 +0200 |
| Organization | A noiseless patient Spider |
| Message-ID | <lf5egdbugxm.fsf@ling.helsinki.fi> (permalink) |
| References | <CAJQX3DyoDUtNWbNEpGVJxeKATADWAikP47NRZb7+UaxSwSRZaQ@mail.gmail.com> <mailman.143.1453367498.15297.python-list@python.org> <56a0d24f$0$1614$c3e8da3$5496439d@news.astraweb.com> <lf5mvrzuj5z.fsf@ling.helsinki.fi> <87mvrzc8bx.fsf@elektro.pacujo.net> |
Marko Rauhamaa writes: > Jussi Piitulainen writes: > >> Steven D'Aprano writes: >> >>> So my guess is that the fastest, and certainly the most obvious, way >>> to get the same integer division behaviour as C99 would be: >>> >>> def intdiv(a, b): >>> # C99 style integer division with truncation towards zero. >>> n = a//b >>> if (a < 0) != (b < 0): >>> n += 1 >>> return n >> >> You should only increment if there is a (non-zero) remainder. > > Maybe: > > def intdiv(a, b): > return a // b if (a < 0) == (b < 0) else -(-a // b) Nice.
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Re: How to simulate C style integer division? Ben Finney <ben+python@benfinney.id.au> - 2016-01-21 20:11 +1100
Re: How to simulate C style integer division? Paul Rubin <no.email@nospam.invalid> - 2016-01-21 01:43 -0800
Re: How to simulate C style integer division? Jussi Piitulainen <jussi.piitulainen@helsinki.fi> - 2016-01-21 11:58 +0200
Re: How to simulate C style integer division? Steven D'Aprano <steve@pearwood.info> - 2016-01-21 23:42 +1100
Re: How to simulate C style integer division? Jussi Piitulainen <jussi.piitulainen@helsinki.fi> - 2016-01-21 16:00 +0200
Re: How to simulate C style integer division? Marko Rauhamaa <marko@pacujo.net> - 2016-01-21 16:31 +0200
Re: How to simulate C style integer division? Jussi Piitulainen <jussi.piitulainen@helsinki.fi> - 2016-01-21 16:48 +0200
Re: How to simulate C style integer division? Random832 <random832@fastmail.com> - 2016-01-21 14:52 -0500
Re: How to simulate C style integer division? Marko Rauhamaa <marko@pacujo.net> - 2016-01-21 23:17 +0200
Re: How to simulate C style integer division? Matt Wheeler <m@funkyhat.org> - 2016-01-22 00:51 +0000
Re: How to simulate C style integer division? Wolfgang Maier <wolfgang.maier@biologie.uni-freiburg.de> - 2016-01-21 15:22 +0100
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