[Home](./index.md) > [rc-js-util](./rc-js-util.md) > [dictionaryPush](./rc-js-util.dictionarypush.md) ## dictionaryPush() function Used with dictionary that store arrays. Where an array exists for a given key the value will be appended to that array, otherwise a new array will be created containing the value. **Signature:** ```typescript export declare function dictionaryPush(dict: IDictionary, key: keyof typeof dict, value: TItem): void; ``` ## Parameters

Parameter	Type	Description
dict	[IDictionary](./rc-js-util.idictionary.md)<TItem\[\]>	The object to check. May be modified.
key	keyof typeof dict	The key to lookup in `dict`.
value	TItem	The value to push.

**Returns:** void ## Remarks See [dictionaryPush()](./rc-js-util.dictionarypush.md).