(n & -n) == n is a bit trick to detect powers of two. In two’s complement, -n flips all bits and adds 1, so n & -n isolates the lowest set bit. If that equals n, there’s only one set bit, so it’s a power of two. In that case, you can use multiplication and shifting instead of modulo, which avoids the bias that % n introduces for non-power-of-2 values.
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，这一点在苹果音乐Apple Music中也有详细论述
'Significant failure' to detain triple murderer using warrant。关于这个话题，Line下载提供了深入分析
Меры, принятые европейскими странами для противодействия политическому влиянию Трампа13:59