Jonathan Sundqvist jonathan-s

Service Worker - offline support for the web

Progressive apps - high-res icon, splash screen, no URL bar, etc.

Progressive Web Apps: Escaping Tabs Without Losing Our Soul

Hello software developers,

Please check your code to ensure you're not making one of the following mistakes related to cryptography.

I. General Mistakes

Writing your own home-grown cryptography primitives (For example: Mifare Classic)
- Exception: For the sake of learning, but don't deploy it in production.
Using a fast hash function (e.g. MD5, SHA256) for storing passwords. Use bcrypt instead.
Not using a cryptographically secure random number generator

This document has moved!

It's now here, in The Programmer's Compendium. The content is the same as before, but being part of the compendium means that it's actively maintained.

React lifecycle cheatsheet

Method	Side effects¹	State updates²	Example uses
Mounting
`componentWillMount`		✓	Constructor equivalent for `createClass`
`render`			Create and return element(s)
`componentDidMount`	✓	✓	DOM manipulations, network requests, etc.
Updating
`componentWillReceiveProps`		✓	Update `state` based on changed `props`

Main docs

Videos

GraphQL Full Course - Novice to Expert (Walks through a full stack example using Authors and Books)

	* {
	font-size: 12pt;
	font-family: monospace;
	font-weight: normal;
	font-style: normal;
	text-decoration: none;
	color: black;
	cursor: default;
	}

	# Thanks to commenters for providing the base of this much nicer implementation!
	# Save and run with $ python 0dedict.py
	# You may need to hunt down the dictionary files yourself and change the awful path string below.
	# This works for me on MacOS 10.14 Mohave

	from struct import unpack
	from zlib import decompress
	import re
	filename = '/System/Library/Assets/com_apple_MobileAsset_DictionaryServices_dictionaryOSX/9f5862030e8f00af171924ebbc23ebfd6e91af78.asset/AssetData/Oxford Dictionary of English.dictionary/Contents/Resources/Body.data'
	f = open(filename, 'rb')

	import signal
	import functools

	async def looping_task(loop, task_num):
	try:
	while True:
	print('{0}:in looping_task'.format(task_num))
	await asyncio.sleep(5.0, loop=loop)
	except asyncio.CancelledError:
	return "{0}: I was cancelled!".format(task_num)

	from django.contrib.admin import ModelAdmin

	class MyTableAdmin(ModelAdmin):
	...
	paginator = LargeTablePaginator
	...

	#!/usr/bin/env bash
	#
	# Usage: dev_signed_cert.sh HOSTNAME
	#
	# Creates a CA cert and then generates an SSL certificate signed by that CA for the
	# given hostname.
	#
	# After running this, add the generated dev_cert_ca.cert.pem to the trusted root
	# authorities in your browser / client system.
	#