mask()

mask(<number>, <number>) mask(<number>, <number>[, <number>...], <operation>)

Combines whole numbers bit by bit. With two arguments it returns their bitwise AND. With more, the last argument is <operation>, and its first character chooses:

&: AND of every number. Any character not listed here, or none, is &.
|: OR of every number.
^: XOR of every number.
~: the first number with every bit of the others cleared.
1: the ones’ complement of the first number. The other numbers must be numbers, but may be negative, and are not used.
2: the two’s complement of the first number.

The answer is an unsigned 32-bit number. A number that is negative, or an argument that is not a number, returns #-1. A number with a fraction uses its whole part. mask() comes from RhostMUSH.

> think mask(12,10) mask(12,10,|) mask(12,10,^) mask(12,10,~)
8 14 6 4
> think mask(5,0,1)
4294967290

Output: 12 is 1100 and 10 is 1010 in binary.

::: seealso

band()
bor()
bxor()
tobin() :::