Nicola Malizia unnikked

What is the appeal of dynamically-typed languages?

Kris Nuttycombe asks:

I genuinely wish I understood the appeal of unityped languages better. Can someone who really knows both well-typed and unityped explain?

I think the terms well-typed and unityped are a bit of question-begging here (you might as well say good-typed versus bad-typed), so instead I will say statically-typed and dynamically-typed.

I'm going to approach this article using Scala to stand-in for static typing and Python for dynamic typing. I feel like I am credibly proficient both languages: I don't currently write a lot of Python, but I still have affection for the language, and have probably written hundreds of thousands of lines of Python code over the years.

Build a scalable Twitter clone with Django and GetStream.io

In this tutorial we are going to build a Twitter clone using Django and GetStream.io, a hosted API for newsfeed development.

We will show you how easy is to power your newsfeeds with GetStream.io. For brevity we leave out some basic Django-specific code and recommend you refer you to the Github project for the complete runnable source code. At the end of this tutorial we will have a Django app with a profile feed, a timeline feed, support for following users, hashtags and mentions.

I assume that you are familiar with Django. If you're new to Django the [official tutorial] (https://docs.djangoproject.com/en/2.0/intro/) explains it very well.

Revival Minimal Theme for Github Pages

I was tired of the unreadable minimal theme by @orderedlist so I overhauled the font sizing and typography to generate this beautiful modern style for forward thinking open source projects to use.

If you've ever used Gitbook, you'll be familiar with my modern / crisp styling and attention to detail.

Install

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.

	/*
	P-code for PL/0 machine

	[ref] https://en.wikipedia.org/wiki/P-code_machine
	[ref] http://blackmesatech.com/2011/12/pl0/pl0.xhtml

	The PL/0 virtual machine was originally specified by Nicklaus Wirth in his book
	Algorithms + Data Structures = Programs; it's used as the target machine for a
	PL/0 compiler.

	package turingmachine;

	public enum Direction {
	LEFT(-1),RIGHT(1);

	private final int vector;
	private Direction(int vector){
	this.vector = vector;
	}

	#!/usr/bin/env python

	"""
	Usage:

	using ~/.slackmerc file:
	$ slackme some info # with `default` profile
	$ slackme --profile alert some info # using `alert` profile

	put profile in filename:

	# The MIT License (MIT)
	# Copyright (c) 2016 Vladimir Ignatev
	#
	# Permission is hereby granted, free of charge, to any person obtaining
	# a copy of this software and associated documentation files (the "Software"),
	# to deal in the Software without restriction, including without limitation
	# the rights to use, copy, modify, merge, publish, distribute, sublicense,
	# and/or sell copies of the Software, and to permit persons to whom the Software
	# is furnished to do so, subject to the following conditions:
	#

	# There are many patterns in python where a decorator is used to add a function to a registry,
	# without altering it at all. Often, the function doesn't need to exist outside of the registry,
	# and a minimal def is supplied- just enough to be decorated. The functools.singledispatch
	# decorator is an example of this:

	@singledispatch
	def func(arg):
	print(arg)

	from contextlib import contextmanager

	class SwitchError(RuntimeError):
	pass

	@contextmanager
	def switch(switch_value, *, ignore_nomatch=True):
	blocks = {}
	blocks.default = None