bit maske

listen to the pronunciation of bit maske
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bitmask
To mask (a value) using a bitmask
A pattern of bits indicating which bits in a second pattern are to be modified
In computer science, a 'mask' is some data that, along with an operation, is used in order to extract information stored elsewhere. The most common mask used, also known as a 'bitmask', extracts the status of certain bits in a binary string or number (a bit field or bit array)