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

Create a stream that emits events from multiple other streams

YAML 1.2 parser and serializer

process.nextTick but always with args

Light ECMAScript (JavaScript) Value Notation - human written, concise, typed, flexible

ES2015 `Object.assign()` ponyfill

Use node's fs.realpath, but fall back to the JS implementation if the native one fails

[](https://travis-ci.org/stefanpenner/get-caller-file) [](https://ci.a

A stream that emits multiple other streams one after another.

Fast (and loose) selective `process.env` replacer using js-tokens instead of an AST

Normalize slashes in a file path to be posix/unix-like forward slashes. Also condenses repeat slashes to a single slash and removes and trailing slashes, unless disabled.

Merge multiple streams into one stream in sequence or parallel.

extend like a boss

Buffers events from a stream until you are ready to handle them.

Require module from string

Support for representing 64-bit integers in JavaScript

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

Returns true if a number or string value is a finite number. Useful for regex matches, parsing, user input, etc.

An arbitrary-precision Decimal type for JavaScript.

A cross browser microtask library