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Damm check digit algorithm
Check if argv has a specific flag
Get the native type of a value.
Check if something is a Node.js stream
Check if the character represented by a given Unicode code point is fullwidth
Returns true if a number or string value is a finite number. Useful for regex matches, parsing, user input, etc.
Check if a path is a file, directory, or symlink
Returns `true` if the given string looks like a glob pattern or an extglob pattern. This makes it easy to create code that only uses external modules like node-glob when necessary, resulting in much faster code execution and initialization time, and a bet
Returns true if the value is an object and not an array or null.
Check if the process is running inside Windows Subsystem for Linux (Bash on Windows)
Returns true if a string has an extglob.
type-check allows you to check the types of JavaScript values at runtime with a Haskell like type syntax.
Check if a value is a plain object
Returns true if an object was created by the `Object` constructor, or Object.create(null).
Returns true if a value has the characteristics of a valid JavaScript descriptor. Works for data descriptors and accessor descriptors.
Check if a file path is a binary file
Detect whether the terminal supports Unicode
Returns true if a value is a plain object, array or function.
Check if something is a generator function
Returns true if the platform is windows. UMD module, works with node.js, commonjs, browser, AMD, electron, etc.