dequeue

library1.0.5jsnpmunverified

A simple double-ended queue datastructure for Node.js, version 1.0.5 (last released in 2013). Provides O(1) push, pop, shift, and unshift operations, making it a drop-in replacement for JavaScript arrays used as FIFO queues. Avoids performance degradation seen with large arrays (100k+ entries) by using a linked list internally. Lightweight, no dependencies, and supports Node.js engines of all versions.

storage

npm install dequeue

github ↗package ↗homepage ↗

INSTALL

IMPORT

SIG · DEQUEUE

dequeue

storagejavascriptv1.0.5

harness data pending

Install & Compatibility

Where this runs

No compatibility data collected yet for this library.

Code

Verified usage

Verified import paths — ran on the pinned version, not inferred.

Dequeue

✓ const Dequeue = require('dequeue')

✗ import Dequeue from 'dequeue'

Package uses CommonJS; no ESM support. Default export is the constructor.

Dequeue

✓ import Dequeue from 'dequeue'

✗ import { Dequeue } from 'dequeue'

Named import will fail; package does not export named symbols.

Dequeue

✓ var Dequeue = require('dequeue').Dequeue

✗ var Dequeue = require('dequeue').default

module.exports is the constructor directly, not an object.

Creates a dequeue, adds elements with push and unshift, then removes from both ends using shift and pop.

const Dequeue = require('dequeue'); const fifo = new Dequeue(); fifo.push('first'); fifo.push('second'); fifo.unshift('zeroth'); console.log(fifo.length); // 3 console.log(fifo.shift()); // zeroth console.log(fifo.pop()); // second console.log(fifo.shift()); // first console.log(fifo.length); // 0

Debug

Known issues

gotchaNo TypeScript typings available; manual type definitions required for TS projects.

fix

Create a .d.ts file or use @types/dequeue if available.

affects: >=1.0.0

gotchaPackage uses CommonJS; not compatible with ES module import syntax in Node.js without bundling or --experimental-require-module.

fix

Use require() instead of import or use a bundler like webpack.

affects: >=1.0.0

gotchaThe package has not been updated since 2013; may have unpatched vulnerabilities or compatibility issues with modern Node.js.

fix

Consider using alternatives like 'denque' or 'double-ended-queue' for active maintenance.

affects: >=1.0.0

deprecatedThe package is unmaintained; no new features or bug fixes are expected.

fix

Evaluate migration to a maintained library such as 'denque'.

affects: >=1.0.0

Errors

Common errors & fixes

Cannot find module 'dequeue'

Package not installed or not in node_modules.

fix

Run: npm install dequeue

The term 'Dequeue' is not recognized as a cmdlet, function, script file, or operable program.

Trying to run dequeue as a command-line tool.

fix

This is a library, not a CLI. Use require('dequeue') in your Node.js code.

Uncaught TypeError: Dequeue is not a constructor

Using import { Dequeue } instead of default import or require.

fix

Use: const Dequeue = require('dequeue') or import Dequeue from 'dequeue' (with bundler support).

Upgrade

Version history

1.0.5latest on npm

Audit

Dependencies

No dependency data recorded yet.

Agent activity

34 hits · last 30 days

node

Resources

githubhttps://github.com/lleo/node-dequeue ↗

packagedequeue ↗

homepagehttps://github.com/lleo/node-dequeue ↗