[Home](./index.md) > [rc-js-util](./rc-js-util.md) > [dictionaryCollect](./rc-js-util.dictionarycollect.md) ## dictionaryCollect() function Like `Array.reduce` but for dictionaries and without the requirement to return the value in the callback. **Signature:** ```typescript export declare function dictionaryCollect(items: TProperty, collected: TRet, collect: (collected: TRet, item: TItem, key: TKey, index: number) => void, keys?: readonly TKey[]): TRet; ``` ## Parameters

Parameter	Type	Description
items	[TProperty](./rc-js-util.tproperty.md)<TKey, TItem>
collected	TRet
collect	(collected: TRet, item: TItem, key: TKey, index: number) => void
keys	readonly TKey\[\]	_(Optional)_

**Returns:** TRet ## Remarks See [dictionaryCollect()](./rc-js-util.dictionarycollect.md).