$code |= 1 << $_
That's what vec is for. It also works for indexes higher than the computer's native integers.

vec( $code, 1, $_ ) = 1;

⠤⠤ ⠙⠊⠕⠞⠁⠇⠑⠧⠊

In reply to Re^2: Making two 8-bit numbers from indices of set bits by diotalevi
in thread Making two 8-bit numbers from indices of set bits by carcassonne

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