3 ms·
He's saying the left hand side of the equation. The order of the items on the right hand side does not matter.
by mipmap04 10y ago
He's saying the left hand side of the equation. The order of the items on the right hand side does not matter.
- mangeletti 10y agoCan an interpreter shirt curcuit a multiplication if the left side is 0? In Python, for instance, is the following: a * b * c * d computed like this?: ((a * b) * c) * d Or is it computed like this?: a * ((b * c) * d) If the former is the case, then the chongli optimization could help, right?
- palunon 10y agoIf you have IEEE compliant floats, you can't, because the right side may result in Infinity, making the complete product NaN.
- mangeletti 10y agoInteresting. We're talking integers here, though (re: Python).
- chrisseaton 10y agoShort circuiting means branching, which is likely to be slower than running operators that you know to result is zero.
- nayuki 10y agoNo, an interpreter cannot short-circuit a zero multiplication. This is because the expressions could be functions that raise exceptions. e.g. 0 * (0/0) e.g. f() * raise_some_exception()
- mangeletti 10y agoAh, of course. In hindsight, I now feel pretty silly even asking that.