[Home](./index.md) > [rc-js-util](./rc-js-util.md) > [getNumberSpecialization](./rc-js-util.getnumberspecialization.md) ## getNumberSpecialization() function Given a Typed array constructor, get back the associated [StableId](./rc-js-util.stableid.md). **Signature:** ```typescript export declare function getNumberSpecialization(ctor: TFullSetTypedArrayCtor): IdSpecialization; ``` ## Parameters

Parameter	Type	Description
ctor	[TFullSetTypedArrayCtor](./rc-js-util.tfullsettypedarrayctor.md)

**Returns:** [IdSpecialization](./rc-js-util.idspecialization.md)