[Home](./index.md) > [@empathyco/x-components](./x-components.md) > [XPriorityQueue](./x-components.xpriorityqueue.md) ## XPriorityQueue interface Data structure to store a list of entries ordered by their priority. **Signature:** ```typescript export interface XPriorityQueue ``` ## Properties | Property | Modifiers | Type | Description | | --- | --- | --- | --- | | [pop](./x-components.xpriorityqueue.pop.md) | | () => [XPriorityQueueNode](./x-components.xpriorityqueuenode.md)<SomeRecord, SomeData> \| undefined | Retrieves and removes the head [node](./x-components.xpriorityqueuenode.md) of the queue. | | [push](./x-components.xpriorityqueue.push.md) | | (key: keyof SomeRecord, priority: number, data?: SomeData) => void | Inserts an element into the queue in the correct position based on its priority. | | [size](./x-components.xpriorityqueue.size.md) | | () => number | Retrieves the number of elements stored in the queue. |