Commutativity and associativity might sound the same, and indeed most commutative operations are also associative. But there are a few math operations that are only one or the other. Matrix multiplication, for example, is associative but not commutative Matrix multiplication - Wikipedia en.wikipedia.org/wiki/Matrix_multiplication#Non-commutativity . And surprisingly, floating point arithmetic — i.e. any math operator in JavaScript — is commutative but not associative Associative property - Wikipedia en.wikipedia.org/wiki/Associative_property#Nonassociativity_of_floating_point_calculation ! ↩
The battery life of the MacBook Air M5 remains the same as its predecessor. In my experience reviewing laptops, Apple has been killing it with its battery life scores (with the M4 lasting over 18 hours on Engadget’s battery test), so I wouldn’t be too shocked if its claims are accurate. Those are: 18 hours of video streaming and 15 hours of wireless web surfing. I’ve also tested the MacBook Air M4, and that latter time is on point.
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Девушка предала лучшую подругу ради должности и моментально пожалела об этом02:33
17:09, 3 марта 2026Экономика
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