In C the shortest and obvious way to avoid conditions is:
int x = 42;
int oneorzero = !!x; /* Will give us a 1 if x is non-zero or 0 if zero */
Is there a similar way in python?
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Zenon
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1`oneorzero = 0 if x == 0 else 1` – Tom Dalton Jun 11 '21 at 13:49
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6`oneorzero = int(bool(x))` should do the trick – Diptangsu Goswami Jun 11 '21 at 13:50
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1I'd say `bool(x)` is pretty decent too. It does not give `int` type, but in Python, there is barely any difference. And it does not obstruct clarity much. – Superior Jun 11 '21 at 13:55
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A boolean is an integer. `isinstance(True, int)` will give you `True`. – Matthias Jun 11 '21 at 13:58
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Does this answer your question? [if x>=1, then 1, otherwise 0, as pure math equation?](https://stackoverflow.com/questions/66516120/if-x-1-then-1-otherwise-0-as-pure-math-equation) – asd-tm Jun 11 '21 at 14:04
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@asd-tm: I don't think so. I was looking more into a bit operations answer like the C solution I describe, and also negative numbers should return a 1. My intention was to avoid branching operations caused by conditions. But I am not sure if a solution like `int(not(not(x)))` in python is better (in terms of speed) than the solution I accepted. – Zenon Jun 11 '21 at 14:30
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@Zenon if you care about speed...don't use Python. – Matt Jun 11 '21 at 14:30
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@Matt: it's for quick prototyping to test different methods, but speed is still important although I admit optimizing such a thing is an overkill. – Zenon Jun 11 '21 at 14:38
2 Answers
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I lately used something like
oneorzero = 1 if x else 0
which has the benefit that x is just tested for its truth value and doesn't necessarily need to be 0 for "false".
glglgl
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