mongoose validation to ensure referenced object id exists

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

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.

Returns true if a npm package exists in global node_modules.

🧩 Pattern matching objects

Check if a name exists on npm registry

Returns existence of key or value in an object

Check if the binary exists on system

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

Check if the node module has exists

allows to verify the existence of any directory on the computer

Utility function to check if a file exists and return a Promise

A Babel plugin which emulates the `a?` existence check from CoffeeScript using the `??` syntax

Check if a filename is in the current working directory.

Test whether a path exists on the filesystem.

Get the existing part of a given path, asynchronously

Checks if given path is a valid URL and resource exists

Check for a Yarn lockfile in the current working directory.

Utility functions that emulate CoffeeScript existence operator

Check if a file exists with a Promise.