I see this in code now and then:
1<<16-1
Python and C interpret that as "1 << (16 - 1)", which is 32768.
The programmer usually means "(1 << 16) - 1", which is 65535.
There's a big difference, especially if you are using these for bit masks:
32768 = 1000000000000000
65535 = 1111111111111111
Tom
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