train chapter size: 6820, test chapter size: 1716
In its most recent third quarter report, Reddit reported 116 million daily active users worldwide, an increase of 19% compared to the same period the year before.
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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 ! ↩。关于这个话题，快连下载安装提供了深入分析
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