ECMAScript AST recursive visitor

Array#isArray for older browsers

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

process.nextTick but always with args

Resolve any installed ES6 compatible promise

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

Get callsites from the V8 stack trace API

**Note:** More details on user side API can be found in [Jest documentation](https://jestjs.io/docs/mock-function-api).

High-priority task queue for Node.js and browsers

generator async control flow goodness

JSON parse & stringify that supports binary via bops & base64

Make a function mimic another one

Turn a function into an `http.Agent` instance

Build chainable fluent interfaces the easy way... with a freakin' chainsaw!

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

Returns true if a string has an extglob.

Make a callback- or promise-based function support both promises and callbacks.

Throttle a function to limit its execution rate

Try to guess if your terminal supports unicode

delay the evaluation of a paramless async function and cache the result