BitSet

Efficient bit storage and manipulation. See samples: https://public.datagrok.ai/js/samples/data-frame/aggregation

Constructors

new BitSet()

new BitSet(dart): BitSet

Creates a BitSet from the specified Dart object.

Parameters

Parameter	Type
dart	any

Returns

BitSet

Source

src/dataframe.ts:1705

Properties

Property	Modifier	Type
dart	public	any

Accessors

anyFalse

get anyFalse(): boolean

Whether any bits are set to false.

Returns

boolean

Source

src/dataframe.ts:1767

---

anyTrue

get anyTrue(): boolean

Whether any bits are set to true.

Returns

boolean

Source

src/dataframe.ts:1764

---

falseCount

get falseCount(): number

Number of unset bits

Returns

number

Source

src/dataframe.ts:1759

---

length

get length(): number

Number of bits in a bitset

Returns

number

Source

src/dataframe.ts:1749

---

onChanged

get onChanged(): Observable<any>

Returns

Observable<any>

• fires when the bitset gets changed.

Source

src/dataframe.ts:1897

---

trueCount

get trueCount(): number

Number of set bits

Returns

number

Source

src/dataframe.ts:1754

---

version

get version(): number

Version of the bitset

Returns

number

Source

src/dataframe.ts:1770

Methods

and()

and(other, notify): BitSet

Modifies this bitset by performing the bitwise AND operation against the specified bitset. Returns this.

Parameters

Parameter	Type	Default value
other	BitSet	undefined
notify	boolean	true

Returns

BitSet

Source

src/dataframe.ts:1787

---

andNot()

andNot(other, notify): BitSet

Modifies this bitset by performing the bitwise AND_NOT operation against the specified bitset. Returns this.

Parameters

Parameter	Type	Default value
other	BitSet	undefined
notify	boolean	true

Returns

BitSet

Source

src/dataframe.ts:1808

---

clone()

clone(): BitSet

Clones a bitset

Returns

BitSet

Source

src/dataframe.ts:1774

---

copyFrom()

copyFrom(b, notify): BitSet

Copies the content from the other BitSet.

Parameters

Parameter	Type	Default value
b	BitSet	undefined
notify	boolean	true

Returns

BitSet

Source

src/dataframe.ts:1887

---

findNext()

findNext(i, x): number

Finds the first index of value x, going forward from i-th position.

Parameters

Parameter	Type	Description
i	number	index
x	boolean	-

Returns

number

Source

src/dataframe.ts:1822

---

findPrev()

findPrev(i, x): number

Finds the first index of value x, going forward from i-th position, or -1 if not found.

Parameters

Parameter	Type	Description
i	number	Index to start searching from.
x	boolean	Value to search for.

Returns

number

• index of the first bit set to x, or -1 if not found

Source

src/dataframe.ts:1830

---

fireChanged()

fireChanged(): void

Returns

void

Source

src/dataframe.ts:1892

---

get()

get(i): boolean

Gets i-th bit

Parameters

Parameter	Type
i	number

Returns

boolean

Source

src/dataframe.ts:1835

---

getBuffer()

getBuffer(): Int32Array

Returns the underlying storage. Be careful with the direct manipulations, as some statistics (set count, etc) are cached.

Returns

Int32Array

Source

src/dataframe.ts:1739

---

getSelectedIndexes()

getSelectedIndexes(): Int32Array

Indexes of all set bits. The result is cached.

Returns

Int32Array

Source

src/dataframe.ts:1882

---

handleClick()

handleClick(rowIndexPredicate, mouseEvent, modifiedSelectOnly): void

Parameters

Parameter	Type	Default value
rowIndexPredicate	IndexPredicate	undefined
mouseEvent	MouseEvent	undefined
modifiedSelectOnly	boolean	false

Returns

void

Source

src/dataframe.ts:1914

---

init()

init(f, notify): BitSet

Sets all bits by setting i-th bit to the results of f(i)

Parameters

Parameter	Type	Default value	Description
f	IndexPredicate	undefined	function that accepts bit index and returns bit value
notify	boolean	true	whether BitSet's changed event should be fired

Returns

BitSet

• this

Source

src/dataframe.ts:1864

---

invert()

invert(notify): BitSet

Inverts a bitset.

Parameters

Parameter	Type	Default value
notify	boolean	true

Returns

BitSet

Source

src/dataframe.ts:1780

---

or()

or(other, notify): BitSet

Modifies this bitset by performing the bitwise OR operation against the specified bitset. Returns this.

Parameters

Parameter	Type	Default value
other	BitSet	undefined
notify	boolean	true

Returns

BitSet

Source

src/dataframe.ts:1794

---

set()

set(i, x, notify): void

Sets i-th bit to x

Parameters

Parameter	Type	Default value	Description
i	number	undefined
x	boolean	undefined
notify	boolean	true	whether BitSet's changed event should be fired

Returns

void

Source

src/dataframe.ts:1844

---

setAll()

setAll(x, notify): BitSet

Sets all bits to x

Parameters

Parameter	Type	Default value	Description
x	boolean	undefined	-
notify	boolean	true	whether BitSet's changed event should be fired

Returns

BitSet

Source

src/dataframe.ts:1815

---

similarityTo()

similarityTo(b, metric): number

Finds the value of similarity between two BitSets.

Parameters

Parameter	Type	Default value	Description
b	BitSet	undefined	second BitSet.
metric	"tanimoto" | "dice" | "cosine" | "sokal" | "russel" | "rogot-goldberg" | "kulczynski" | "mc-connaughey" | "asymmetric" | "braun-blanquet"	SIMILARITY_METRIC.TANIMOTO	similarity metric to use.

Returns

number

• similarity value

Source

src/dataframe.ts:1905

---

toBinaryString()

toBinaryString(): string

Returns

string

Source

src/dataframe.ts:1743

---

toString()

toString(): string

Returns

string

• string representation of this bitset, like '0110'.

Source

src/dataframe.ts:1910

---

xor()

xor(other, notify): BitSet

Modifies this bitset by performing the bitwise XOR operation against the specified bitset. Returns this.

Parameters

Parameter	Type	Default value
other	BitSet	undefined
notify	boolean	true

Returns

BitSet

Source

src/dataframe.ts:1801

---

create()

static create(length, f?): BitSet

Creates a BitSet of the specified length with all bits set to false.

Parameters

Parameter	Type	Description
length	number	Number of bits.
f?	null | IndexPredicate	when specified, Sets all bits by setting i-th bit to the results of f(i)

Returns

BitSet

Source

src/dataframe.ts:1730

---

fromBytes()

static fromBytes(buffer, bitLength): BitSet

Creates a BitSet from the ArrayBuffer representing the bitset.

Parameters

Parameter	Type	Description
buffer	ArrayBuffer	An array containing 1 and 0.
bitLength	number	count of bits.

Returns

BitSet

Source

src/dataframe.ts:1720

---

fromString()

static fromString(zerosOnes): BitSet

Creates a BitSet from the string representing the bitset.

Parameters

Parameter	Type	Description
zerosOnes	string	A string containing '1' and '0'.

Returns

BitSet

Source

src/dataframe.ts:1712