This library is inspired by functional programming - Clojure

• Updated Nov 15, 2023
• Go

The minimum and most straightforward way to check if command exists and where the executable is, without spawning child_process.

• Updated May 1, 2025
• TypeScript

Check if artifact exists in remote maven repository

• Updated Jul 22, 2025
• Java

Joining Tables in SQL

• Updated Jul 30, 2024

mongoose validation to ensure referenced object id exists

• Updated Mar 1, 2023
• JavaScript

🪐 The missing fs.promises.exists(). Also supports case-sensitive/insensitive file paths.

• Updated Oct 12, 2025
• TypeScript

Node module to check if a command-line command exists.

• Updated Sep 28, 2019
• JavaScript

DEPRECATED REPO!! New place at https://github.com/tunnckocore/opensource! Next release soon will be published! Return positive value if any of passed values exists in array, or optionally an index.

• Updated May 27, 2018
• JavaScript

Returns true if a npm package exists in global node_modules.

• Updated Jun 2, 2017
• JavaScript

Laravel validation rule to check if a custom route key exists.

• Updated Nov 6, 2017
• PHP

🧩 Pattern matching objects

• Updated Aug 27, 2020
• JavaScript

Check if a name exists on npm registry

• Updated Dec 10, 2017
• JavaScript

Elaborated examples concerning functional concepts e.g. gadt, eadt, church encodings

• Updated Oct 16, 2024
• PureScript

A validation module checking for Gmail account existence

• Updated Oct 17, 2025
• C#

[OBSOLETE] Checks if an e-mail address exists or not

• Updated Aug 24, 2017
• Python

Returns existence of key or value in an object

• Updated Apr 5, 2021
• JavaScript

Solves routine array actions: get value by key if exists or default; set key if not exists. PHP 5, 7

• Updated Jun 8, 2018
• PHP

Check if the node module has exists

• Updated Feb 16, 2017
• JavaScript

allows to verify the existence of any directory on the computer

• Updated Apr 16, 2020
• JavaScript

🧲 Provides ways of properly checking if a path exists inside a given array of files/directories both on Windows and UNIX-like operating systems. 🗺

• Updated Aug 30, 2025
• TypeScript