bitwise-operation
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bitwise-operation is a JavaScript library that provides useful bitwise operation helpers without converting integer to an array.
Node.js npm install --save bitwise-operation
Require.js require(["bitwise"], ...
Require in Node var Bitwise = require('bitwise-operation');
Broser <script src="/node_modules/bitwise-operation/bitwise.js"></script>
new Bitwise(value)
Bitwise(value)
Create a bitwise object to chain operations.
Example:
var Bitwise = require('bitwise-operation')
Bitwise(0b0100)
.and(0b1100)
.or(0b0010)
.valueOf();
=> 0b0110
Bitwise([0, 0, 1, 0])
.valueOf();
=> 0b0100
Bitwise("1011")
.valueOf();
=> 0b1011
Bitwise.not(value) Bitwise(value).not()
Performs a logical NOT of this target bit set.
Truth table:
| a | NOT a |
|---|---|
| 0 | 1 |
| 1 | 0 |
Example:
var Bitwise = require('bitwise-operation')
Bitwise.not(0b1010);
Bitwise(0b1010)
.not()
.valueOf();
=> 0b0101
Bitwise.and(...values)
Bitwise(value).and(value)
Performs a logical AND of this target bit set with the argument bit set.
Truth table:
| a | b | a AND b |
|---|---|---|
| 0 | 0 | 0 |
| 0 | 1 | 0 |
| 1 | 0 | 0 |
| 1 | 1 | 1 |
Example:
var Bitwise = require('bitwise-operation')
Bitwise.and(0b0111, Bitwise(0b0101), 0b1100);
Bitwise(0b0111)
.and(Bitwise(0b0101))
.and(0b1100)
.valueOf();
=> 0b0100
Bitwise.nand(...values) Bitwise(value).nand(value)
Clears all of the bits in this BitSet whose corresponding bit is set in the specified BitSet.
Truth table:
| a | b | a NAND b |
|---|---|---|
| 0 | 0 | 1 |
| 0 | 1 | 1 |
| 1 | 0 | 1 |
| 1 | 1 | 0 |
Example:
var Bitwise = require('bitwise-operation')
Bitwise.nand(0b0010, 0b0110);
Bitwise(0b0010)
.nand(0b0110)
.valueOf();
=> 0b1101
Alias: andNot()
Bitwise.or(...values)
Bitwise(value).or(value)
Performs a logical OR of this bit set with the bit set argument.
Truth table:
| a | b | a OR b |
|---|---|---|
| 0 | 0 | 0 |
| 0 | 1 | 1 |
| 1 | 0 | 1 |
| 1 | 1 | 1 |
Example:
var Bitwise = require('bitwise-operation')
Bitwise.or(0b0010, 0b0110);
Bitwise(0b0010)
.or(0b0110)
.valueOf();
=> 0b0110
### nor()
**Bitwise.nor(...values)**
**Bitwise(value).nor(value)**
Performs a logical **NOR** of this bit set with the bit set argument.
Truth table:
| a | b | a NOR b |
|---|---|---------|
| 0 | 0 | 1 |
| 0 | 1 | 0 |
| 1 | 0 | 0 |
| 1 | 1 | 0 |
Example:
```js
var Bitwise = require('bitwise-operation')
Bitwise.nor(0b0010, 0b0110);
Bitwise(0b0010)
.nor(0b0110)
.valueOf();
=> 0b1001
Bitwise.xor(...values)
Bitwise(value).xor(value)
Performs a logical XOR of this bit set with the bit set argument.
Truth table:
| a | b | a XOR b |
|---|---|---|
| 0 | 0 | 0 |
| 0 | 1 | 1 |
| 1 | 0 | 1 |
| 1 | 1 | 0 |
Example:
var Bitwise = require('bitwise-operation')
Bitwise.xor(0b0010, 0b0110);
Bitwise(0b0010)
.xor(0b0110)
.valueOf();
=> 0b0100
Bitwise.xnor(...values) Bitwise(value).xnor(value)
Performs a logical XNOR of this bit set with the bit set argument.
Truth table:
| a | b | a XNOR b |
|---|---|---|
| 0 | 0 | 1 |
| 0 | 1 | 0 |
| 1 | 0 | 0 |
| 1 | 1 | 1 |
Example:
var Bitwise = require('bitwise-operation')
Bitwise.xor(0b0010, 0b0110);
Bitwise(0b0010)
.xor(0b0110)
.valueOf();
=> 0b1011
Alias: nxor()
Bitwise.mask([fromIndex= 0,] toIndex)
Bitwise(value).mask([fromIndex= 0,] toIndex)
Sets the bits not in the specified fromIndex (inclusive) to the specified toIndex (inclusive) to false.
Example:
var Bitwise = require('bitwise-operation')
Bitwise.mask(1, 5); // => 0b00011110
Bitwise(0b1011011)
.mask(1, 5) // => 0b00011110
.valueOf();
// Equal to: Bitwise(0b1011011).and(Bitwise.mask(1, 5)).valueOf()
=> 0b00011010
Bitwise(value).clear([fromIndex= 0,] toIndex)
Sets the bits from the specified fromIndex (inclusive) to the specified toIndex (inclusive) to false.
Example:
var Bitwise = require('bitwise-operation')
Bitwise(0b1011011)
.clear(1, 5)
.valueOf();
=> 0b1000001
Bitwise(value).length()
Returns the "logical size" of this Bitwise: the index of the highest set bit in the Bitwise plus one.
Example:
var Bitwise = require('bitwise-operation')
Bitwise(0b1011011)
.length();
=> 7
Alias: size()
Bitwise(value).set(idx [, value = true])
Sets the bit at the specified index to the specified value (default true)
Example:
var Bitwise = require('bitwise-operation')
Bitwise(0b0001)
.set(2)
.valueOf();
=> 0b0101
Bitwise(value).set(idx)
Sets the bit at the specified index to false
Example:
var Bitwise = require('bitwise-operation')
Bitwise(0b0101)
.unset(0)
.valueOf();
=> 0b0100
Bitwise(value).get(idx)
Returns the value of the bit with the specified index
Example:
var Bitwise = require('bitwise-operation')
Bitwise(0b0001)
.get(0)
.valueOf();
=> true
Bitwise.toggle(value, ...idx) Bitwise(value).toggle(idx)
Sets the bit at the specified index to the complement of its current value.
Example:
var Bitwise = require('bitwise-operation')
Bitwise.toggle(0b0001, 1);
Bitwise(0b0001)
.toggle(1)
.valueOf();
=> 0b0011
Bitwise.toggle(value, ...[idx1, idx2]) Bitwise(value).swap(idx1, idx2)
Swap bits to index idx1 and idx2
Example:
var Bitwise = require('bitwise-operation')
Bitwise.swap(0b0101, [1, 2]);
Bitwise(0b0101)
.swap(1, 2)
.valueOf();
=> 0b0011
Bitwise(value).equals(value)
Compares this object against the specified object
Example:
var Bitwise = require('bitwise-operation')
Bitwise(0b0101)
.equals(0b0111);
=> false
Bitwise(value).setValue(value)
Replaces the current value of the object with the new value
Example:
var Bitwise = require('bitwise-operation')
Bitwise(0b0101)
.setValue(0b0111)
.valueOf();
=> 0b0111
Bitwise(value).setRange(fromIndex, toIndex )
Sets the bits from the specified fromIndex (inclusive) to the specified toIndex (inclusive) to true.
Example:
var Bitwise = require('bitwise-operation')
Bitwise(0b0101)
.setRange(1, 2)
.valueOf();
=> 0b0111
Bitwise(value).unsetRange(fromIndex, toIndex )
Sets the bits from the specified fromIndex (inclusive) to the specified toIndex (inclusive) to false.
Example:
var Bitwise = require('bitwise-operation')
Bitwise(0b0101)
.unsetRange(1, 2)
.valueOf();
=> 0b0001
Bitwise(value).toggleRange(fromIndex, toIndex )
Sets each bit from the specified fromIndex (inclusive) to the specified toIndex (inclusive) to the complement of its current value.
Example:
var Bitwise = require('bitwise-operation')
Bitwise(0b0101)
.toggleRange(1, 2)
.valueOf();
=> 0b0011
Bitwise(value).copy()
Cloning this Bitwise produces a new Bitwise that is equal to it.
Example:
var Bitwise = require('bitwise-operation')
var a = Bitwise(0b0001);
var b = a;
var c = a.copy();
a.toggle(1);
a.valueOf(); // => 0b0011
b.valueOf(); // => 0b0011
c.valueOf(); // => 0b0001
Alias: clone()
Bitwise(value).valueOf()
Return the current value of this Bitwise.
Example:
var Bitwise = require('bitwise-operation')
Bitwise(0b0101)
.valueOf();
=> 0b0101
Bitwise(value).toString()
Bitwise(value).toString(length, separator)
Returns a string representation of this Bitwise.
Example:
var Bitwise = require('bitwise-operation')
Bitwise(0b0101)
.toString();
=> "0101"
Bitwise(571)
.toString(4, " ");
=> "10 0011 1011"
Bitwise(value).toArray()
Returns a array representation of this Bitwise.
Example:
var Bitwise = require('bitwise-operation')
var bitwise = Bitwise(571);
bitwise.toString(4, " ");
=> "10 0011 1011"
bitwise.toArray();
=> [ 1, 1, 0, 1, 1, 1, 0, 0, 0, 1 ]
Bitwise(value).cardinality()
Returns the number of bits set to true in this Bitwise.
Example:
var Bitwise = require('bitwise-operation')
var bitwise = Bitwise(571);
bitwise.toString(4, " ");
=> "10 0011 1011"
bitwise.cardinality();
=> 6
FAQs
JavaScript's bitwise operation helper library.
The npm package bitwise-operation receives a total of 1 weekly downloads. As such, bitwise-operation popularity was classified as not popular.
We found that bitwise-operation demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 1 open source maintainer collaborating on the project.
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