$bit¶

$bit¶

The $bit operator performs a bitwise update of a field. Only use this with integer fields, as in the following examples:

copy

db.collection.update( { field: NumberInt(1) }, { $bit: { field: { and: NumberInt(5) } } } );

db.collection.update( { field: NumberInt(1) }, { $bit: { field: { or: NumberInt(5) } } } );

Here, the $bit operator updates the integer value of the field named field: in the first example with a bitwise and: 5 operation; and in the second example with a bitwise or: 5 operation. $bit only works with integers.

$bit only supports AND and OR bitwise operations.

Note

All numbers in the mongo shell are doubles, not integers. Use the NumberInt() constructor to specify integers. See NumberInt for more information.

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