Storied camera brand Leica has been involved with Xiaomi’s phones for a few years and its newest flagship doesn’t disappoint in that regard, because this is another Xiaomi device dedicated to photography.
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 ! ↩
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Yet in practice, it sometimes turns out that a setup of some complex scenarios, especially corner cases, takes too much effort/code. Or there are algorithms that, for the time being, are used only with limited parameters, but we should exercise the whole implementation in tests. There might be a similar situation with complex Value Objects. In such cases it’s worthwhile to go one level below Sociable Unit Tests and create a suite of Overlapping Unit Tests.。关于这个话题，搜狗输入法2026提供了深入分析
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