Ruben Nic RubenSandwich

A Guide to Functional Programming Lingo for JavaScripters

Functional programming gets a bad wrap about being too hard for mere mortals to comprehend. This is nonsense. The concepts are actually quite simple to grasp.

The jargon is the hardest part. A lot of that vocabulary comes from a specialized field of mathematical study called category theory (with a liberal sprinkling of type theory and abstract algebra). This sounds a lot scarier than it is. You can do this!

All examples using ES6 syntax. wrap (foo) => bar means:

function wrap (foo) {

Flamegraphs for your node processes on OS X

This document will help you generate flamegraphs for your node processes on OS X.

You can read about the various types of flamegraphs and how they are useful
in Brendan Gregg's wonderful write up here.

By the end of this document, you should have a flamegraph for you node app to play with.

Learning FP the hard way: Experiences on the Elm language

by Ossi Hanhinen, @ohanhi

with the support of Futurice 💚.

Licensed under CC BY 4.0.

Editorial note

System Design Cheatsheet

Picking the right architecture = Picking the right battles + Managing trade-offs

Basic Steps

Clarify and agree on the scope of the system

User cases (description of sequences of events that, taken together, lead to a system doing something useful)
- Who is going to use it?
- How are they going to use it?

Breaking Down Tic-tac-toe

Last week, @RubenSandwich posted an interactive demo on the mailing list capable of playing and scoring tic-tac-toe matches. He provided some great feedback about the issues he ran into along the way. Now that the language is becoming more stable, our first priority is seeing it used and addressing the problems which surface. To that end, his troubles became our guide to making Eve a little friendlier for writing interactive applications in general and tic-tac-toe in specific.

This analysis (and future breakdowns) will be written inline in Eve to make the discussion flow more naturally. Since our blog is capable of rendering Markdown, we can provide a pleasant reading experience directly from the source code. At the moment, Eve's syntax only lends itself to a subset of Markdown, but we plan to make some small changes in the near future to become fully compatible with [GFM][2

	#!/bin/sh

	UNIVERSAL_OUTPUTFOLDER=${BUILD_DIR}/${CONFIGURATION}-universal

	# make sure the output directory exists
	mkdir -p "${UNIVERSAL_OUTPUTFOLDER}"

	# Step 1. Build Device and Simulator versions
	xcodebuild -target "${PROJECT_NAME}" ONLY_ACTIVE_ARCH=NO -configuration ${CONFIGURATION} -sdk iphoneos BUILD_DIR="${BUILD_DIR}" BUILD_ROOT="${BUILD_ROOT}" clean build
	xcodebuild -target "${PROJECT_NAME}" -configuration ${CONFIGURATION} -sdk iphonesimulator ONLY_ACTIVE_ARCH=NO BUILD_DIR="${BUILD_DIR}" BUILD_ROOT="${BUILD_ROOT}" clean build

	#!/usr/bin/env python3

	"""Simple HTTP Server With Upload.

	This module builds on BaseHTTPServer by implementing the standard GET
	and HEAD requests in a fairly straightforward manner.

	see: https://gist.github.com/UniIsland/3346170
	"""

	var active = false;

	function changeRefer(details) {
	if (!active) return;

	for (var i = 0; i < details.requestHeaders.length; ++i) {
	if (details.requestHeaders[i].name === 'Referer') {
	details.requestHeaders[i].value = 'http://www.google.com/';
	break;
	}

	module type CELL = sig
	type 'a cell
	type 'a exp

	val return : 'a -> 'a exp
	val (>>=) : 'a exp -> ('a -> 'b exp) -> 'b exp

	val cell : 'a exp -> 'a cell exp
	val get : 'a cell -> 'a exp

	# Install QEMU OSX port with ARM support
	sudo port install qemu +target_arm
	export QEMU=$(which qemu-system-arm)

	# Dowload kernel and export location
	curl -OL \
	https://github.com/dhruvvyas90/qemu-rpi-kernel/blob/master/kernel-qemu-4.1.7-jessie
	export RPI_KERNEL=./kernel-qemu-4.1.7-jessie

	# Download filesystem and export location