dns.getServers() Returns an array of IP address strings that are being used for name resolution.

Class: fs.WriteStream WriteStream is a Writable Stream.

Stability: 2 - Stable A stream is an abstract interface implemented by various objects in Node.js. For example a request to an HTTP server is a stream, as is process.stdout. Streams are readable, writable, or both. All streams are instances of EventEmitter. You can load the Stream base classes by doing require('stream'). There are base classes provided for Readable streams, Writable streams, Duplex streams, and Transform streams. This document is split up into 3 sections: The first section e

socket.bytesWritten The amount of bytes sent.

fs.rename(oldPath, newPath, callback) Asynchronous rename(2). No arguments other than a possible exception are given to the completion callback.

emitter.addListener(eventName, listener) Alias for emitter.on(eventName, listener).

process.getgroups() Note: this function is only available on POSIX platforms (i.e. not Windows, Android) Returns an array with the supplementary group IDs. POSIX leaves it unspecified if the effective group ID is included but Node.js ensures it always is.

worker.id <Number> Each new worker is given its own unique id, this id is stored in the id. While a worker is alive, this is the key that indexes it in cluster.workers

assert.fail(actual, expected, message, operator) Throws an AssertionError. If message is falsy, the error message is set as the values of actual and expected separated by the provided operator. Otherwise, the error message is the value of message. const assert = require('assert'); assert.fail(1, 2, undefined, '>'); // AssertionError: 1 > 2 assert.fail(1, 2, 'whoops', '>'); // AssertionError: whoops

assert.equal(actual, expected[, message]) Tests shallow, coercive equality between the actual and expected parameters using the equal comparison operator ( == ). const assert = require('assert'); assert.equal(1, 1); // OK, 1 == 1 assert.equal(1, '1'); // OK, 1 == '1' assert.equal(1, 2); // AssertionError: 1 == 2 assert.equal({a: {b: 1}}, {a: {b: 1}}); //AssertionError: { a: { b: 1 } } == { a: { b: 1 } } If the values are not equal, an AssertionError is thrown with a message property