I need to invert the bits in a (very) large bitstring. Doing so is easy enough:

$bits = ~$bits;

[download]

The problem is that involves duplicating the entire bitstring and then copying it.

What I want is $bits ~= ?; but that obviously doesn't exist.

I could xor it with an equal length string of 1s, but same problem.

Can anyone think of a way of doing this whilst avoiding doubling the memory requirement?

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In reply to In-place bitwise NOT? by BrowserUk

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