Queue

A queue has the logic of waiting in line at the bakery. First in, first out.

Immutable

Queues.immutable creates a queue, returning type Interface IQueueImmutable .


import { Queues } from "https://unpkg.com/@ixfx/collections/bundle"

let q = Queues.immutable();
q = q.enqueue(`a`, `b`); // Add two strings
const front = q.peek;    // `a`, since it's the front of the queue (oldest)
q = q.dequeue();         // q now just consists of `b`

Mutable

Queues.QueueMutable


import { Queues } from "https://unpkg.com/@ixfx/collections/bundle"

const q = new Queues.QueueMutable();
q.enqueue(`a`, `b`);      // Add two strings
const item = q.dequeue(); // Remove & return `a` from front of queue
q.peek; // `b`

QueueMutable class also has events to monitor changes to the data.

Importing

// Sub module
import { Queue } from "@ixfx/collections.js"
// Eg: Queue.immutable();

// Whole module
import * as Collections from "@ixfx/collections.js"
// Eg: Collections.Queue.immutable();

// From bundle
import { Collections } from "@ixfx"
// Eg: Collections.Queue.immutable();

// And within your HTML's <HEAD> </HEAD> block:
<script type="importmap">{ "imports": { "@ixfx":"/ixfx/index.js", "@ixfx/": "/ixfx/" } }</script>

// Sub module from parent
import { Queue } from "@ixfx/collections.js"
// Eg: Queue.immutable();

// Whole parent module
import * as Collections from "@ixfx/collections.js"
// Eg: Collections.Queue.immutable();

// From the bundle
import { Collections } from "@ixfx/bundle.js"
// Eg: Collections.Queue.immutable();

// Sub module from parent
import { Queue } from "https://unpkg.com/@ixfx/collections/bundle"
// Eg: Queue.immutable();

// Whole parent module
import * as Collections from "https://unpkg.com/@ixfx/collections/bundle"
// Eg: Collections.Queue.immutable();

// Single module from the bundle
import { Collections } from "https://unpkg.com/@ixfx/bundle"
// Eg: Collections.Queue.immutable();