Low Level Bit Hacks You Absolutely Must Know

Re:Low Level Bit Hacks You Absolutely Must Know by tonyarkles on Friday May 11, 2018 @01:32PM (#17049249)

Javascript as well:

    >> -2 % 2
    -0
    >> -3 % 2
    -1

Edit: well, at least in Firefox JS. I have no idea if that's actually standard-mandated behaviour or if it's an implementation quirk. The -0 is especially weird (I had written odd but...)

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Re:Low Level Bit Hacks You Absolutely Must Know by justin66 on Friday May 11, 2018 @01:40PM (#17049312)

This is pretty interesting. I don't use js but I took a quick look and apparently (x % 2) == 0 as a test for even integers should still work properly there, since a comparison of -0 and 0 will consider them equivalent.

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