[Home](./index.md) > [rc-js-util](./rc-js-util.md) > [DirtyCheckedUniqueCollection](./rc-js-util.dirtycheckeduniquecollection.md) ## DirtyCheckedUniqueCollection class Provides a unique array with O(1) add & remove, with dirty checking on `getArray`. **Signature:** ```typescript export declare class DirtyCheckedUniqueCollection implements IDirtyCheckedUniqueCollection, ISetLike ``` **Implements:** [IDirtyCheckedUniqueCollection](./rc-js-util.idirtycheckeduniquecollection.md)<TItem>, [ISetLike](./rc-js-util.isetlike.md)<TItem> ## Constructors

Constructor	Modifiers	Description
[(constructor)(itemsToCopy)](./rc-js-util.dirtycheckeduniquecollection._constructor_.md)		Constructs a new instance of the `DirtyCheckedUniqueCollection` class

## Properties

Property	Modifiers	Type	Description
[isDirty](./rc-js-util.dirtycheckeduniquecollection.isdirty.md)		boolean
[size](./rc-js-util.dirtycheckeduniquecollection.size.md)	`readonly`	number

## Methods

Method	Modifiers	Description
[add(item)](./rc-js-util.dirtycheckeduniquecollection.add.md)
[clear()](./rc-js-util.dirtycheckeduniquecollection.clear.md)
[delete(item)](./rc-js-util.dirtycheckeduniquecollection.delete.md)
[getArray()](./rc-js-util.dirtycheckeduniquecollection.getarray.md)
[getSet()](./rc-js-util.dirtycheckeduniquecollection.getset.md)
[has(item)](./rc-js-util.dirtycheckeduniquecollection.has.md)
[mapInitializeAdd(map, key, value)](./rc-js-util.dirtycheckeduniquecollection.mapinitializeadd.md)	`static`
[mapInitializeAdd(map, key, value)](./rc-js-util.dirtycheckeduniquecollection.mapinitializeadd_1.md)	`static`
[reportingAdd(item)](./rc-js-util.dirtycheckeduniquecollection.reportingadd.md)