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Question: Please describe 3 or 4 of your favorite bitwise operator tricks
Asked by Will (70.173.80.x) on February 16 2014, 1:14am
Reply on February 16 2014, 4:48am (edited at February 17 2014, 5:32pm):
    Hmm I dunno if I really have favorite tricks. x & (x-1) for checking if something is a power of two is somewhat handy. Knowing how "x/2" and "x>>1" differ is important, IMO, as well as "x%2" vs "x&1" (what code is produced by each, and why it matters, depending on types of course). Most recently I discovered this, which had never come up: 
    for (int x=-1;x<sizeof(x);x++) printf("x");
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