Pass two numbers, get a regex-compatible source string for matching ranges. Validated against more than 2.78 million test assertions.

ECMAScript parsing infrastructure for multipurpose analysis

Neo-Async is a drop-in replacement for Async, it almost fully covers its functionality and runs faster

Port of jQuery.extend for node.js and the browser

The Lodash method `_.merge` exported as a module.

utility box for ECMAScript language tools

Array#isArray for older browsers

Recursively iterates over specified directory, require()'ing each file, and returning a nested hash structure containing those modules.

Define a non-enumerable property on an object. Uses Reflect.defineProperty when available, otherwise Object.defineProperty.

HTTP methods that node supports

Extend an object with the properties of additional objects. node.js/javascript util.

Make your own error types!

Returns true if a value is a plain object, array or function.

Determine if an object is a Buffer

Test whether an object looks like a promises-a+ promise

merge() utility function

An Object.keys replacement, in case Object.keys is not available. From https://github.com/es-shims/es5-shim

Promisify a callback-based function

Flatten nested arrays

deterministic `JSON.stringify()` - a faster version of substack's json-stable-strigify without jsonify