grafana/docs/sources/packages_api/data/circularvector.md

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title = "CircularVector" keywords = ["grafana","documentation","sdk","@grafana/data"] type = "docs" +++

CircularVector class

Circular vector uses a single buffer to capture a stream of values overwriting the oldest value on add.

This supports adding to the 'head' or 'tail' and will grow the buffer to match a configured capacity.

Signature

export declare class CircularVector<T = any> extends FunctionalVector implements MutableVector<T> 

Import

import { CircularVector } from '@grafana/data';

Constructors

Constructor	Modifiers	Description
constructor(options)		Constructs a new instance of the CircularVector class

Properties

Property	Modifiers	Type	Description
add		(value: T) => void	Add the value to the buffer
length		number

Methods

Method	Modifiers	Description
get(index)
reverse()
set(index, value)
setAppendMode(mode)
setCapacity(v)
toArray()
toJSON()

constructor(options)

Constructs a new instance of the CircularVector class

Signature

constructor(options: CircularOptions<T>);

Parameters

Parameter	Type	Description
options	CircularOptions<T>

add property

Add the value to the buffer

Signature

add: (value: T) => void;

length property

Signature

get length(): number;

get method

Signature

get(index: number): T;

Parameters

Parameter	Type	Description
index	number

Returns:

T

reverse method

Signature

reverse(): void;

Returns:

void

set method

Signature

set(index: number, value: T): void;

Parameters

Parameter	Type	Description
index	number
value	T

Returns:

void

setAppendMode method

Signature

setAppendMode(mode: 'head' | 'tail'): void;

Parameters

Parameter	Type	Description
mode	'head' | 'tail'

Returns:

void

setCapacity method

Signature

setCapacity(v: number): void;

Parameters

Parameter	Type	Description
v	number

Returns:

void

toArray method

Signature

toArray(): T[];

Returns:

T[]

toJSON method

Signature

toJSON(): T[];

Returns:

T[]