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 ! ↩
Оказавшиеся в Дубае российские звезды рассказали об обстановке в городе14:52
，详情可参考同城约会
Военный рассказал, что они пытались общаться с наемниками на английском, но потом им дали команду штурмовать.
第一百零三条 公安机关对与违反治安管理行为有关的场所或者违反治安管理行为人的人身、物品可以进行检查。检查时，人民警察不得少于二人，并应当出示人民警察证。