Jon E. Eguiluz Viroide

The introduction to Reactive Programming you've been missing

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.

(C-x means ctrl+x, M-x means alt+x)

The default prefix is C-b. If you (or your muscle memory) prefer C-a, you need to add this to ~/.tmux.conf:

	function printHierarchy(node, padding="") {
	let newPadding = padding;

	if (node.name) {
	newPadding += " \|";
	console.log(`${padding}-${node.name}`);
	}

	node.children.forEach(child => printHierarchy(child, newPadding));
	}

	#!/bin/bash

	#this script was written to be called with find, something like:
	# find . -type f \( -name .jpg -o -name .png -o -name .JPG -o -name .PNG \) -exec ~/batchImageOptim.sh "{}" \;

	if [[ $# == 1 ]]; then
	input_file="$1"
	else
	echo "no arguments, no party"
	exit 255

	import javax.crypto.Cipher;
	import java.security.NoSuchAlgorithmException;

	public class KeyLengthDetector {
	public static void main(String[] args) {
	int allowedKeyLength = 0;

	try {
	allowedKeyLength = Cipher.getMaxAllowedKeyLength("AES");
	} catch (NoSuchAlgorithmException e) {

	Groovy also has a Time Category class which gives you DSL style syntax for manipulating dates. Here is an example:

	import org.codehaus.groovy.runtime.TimeCategory
	now = new Date()
	println now
	use(TimeCategory) {
	footballPractice = now + 1.week - 4.days + 2.hours - 3.seconds
	}
	println footballPractice
	which will produce output like this: