Tom h2non

Disclaimer: This is an unofficial post by a random person from the community. I am not an official representative of io.js. Want to ask a question? open an issue on the node-forward discussions repo

io.js - what you need to know

io is a fork of node v0.12 (the next stable version of node.js, currently unreleased)
io.js will be totally compatible with node.js
the people who created io.js are node core contributors who have different ideas on how to run the project
it is not a zero-sum game. many core contributors will help maintain both node.js and io.js

The introduction to Reactive Programming you've been missing

(by @andrestaltz)

This tutorial as a series of videos

If you prefer to watch video tutorials with live-coding, then check out this series I recorded with the same contents as in this article: Egghead.io - Introduction to Reactive Programming.

ANNOUNCEMENT

I have moved this over to the Tech Interview Cheat Sheet Repo and has been expanded and even has code challenges you can run and practice against!

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Notational Conventions

This section describes the conventions used here to describe type signatures.

A [T] is an array-like value (only ever used read-only in this API), i.e., one with an integer length and whose indexed properties from 0 to length - 1 are of type T.

A type T? should be read as T | undefined -- that is, an optional value that may be undefined.

	test = map ((*) 2) >>> filter ((>) 15) >>> drop 3 >>> map show
	src1 = [10, 9, 8, 7, 6, 5, 4, 3, 2, 1]
	src2 = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]

	res1 = transduce' test src1 :: [String]
	res2 = transduce' test src2 :: List String

	/**
	* Retrieves all the rows in the active spreadsheet that contain data and logs the
	* values for each row.
	* For more information on using the Spreadsheet API, see
	* https://developers.google.com/apps-script/service_spreadsheet
	*/
	function readRows() {
	var sheet = SpreadsheetApp.getActiveSheet();
	var rows = sheet.getDataRange();
	var numRows = rows.getNumRows();

	/**
	git clone https://github.com/twitter/scalding.git
	cd scalding
	./sbt scalding-repl/console
	*/

	import scala.io.Source
	val alice = Source.fromURL("http://www.gutenberg.org/files/11/11.txt").getLines
	// Add the line numbers, which we might want later
	val aliceLineNum = alice.zipWithIndex.toList

	# Original Rails controller and action
	class EmployeesController < ApplicationController
	def create
	@employee = Employee.new(employee_params)

	if @employee.save
	redirect_to @employee, notice: "Employee #{@employee.name} created"
	else
	render :new
	end

	package main

	import(
	"log"
	"net/url"
	"net/http"
	"net/http/httputil"
	)

	func main() {