James Lefrère JamesLefrere

OS X Screencast to animated GIF

This gist shows how to create a GIF screencast using only free OS X tools: QuickTime, ffmpeg, and gifsicle.

Instructions

To capture the video (filesize: 19MB), using the free "QuickTime Player" application:

Stuff I wish I'd known sooner about service workers

I recently had several days of extremely frustrating experiences with service workers. Here are a few things I've since learned which would have made my life much easier but which isn't particularly obvious from most of the blog posts and videos I've seen.

I'll add to this list over time – suggested additions welcome in the comments or via twitter.com/rich_harris.

Use Canary for development instead of Chrome stable

~~Chrome 51 has some pretty wild behaviour related to console.log in service workers. Canary doesn't, and it has a load of really good service worker related stuff in devtools.~~

FWIW: I (@rondy) am not the creator of the content shared here, which is an excerpt from Edmond Lau's book. I simply copied and pasted it from another location and saved it as a personal note, before it gained popularity on news.ycombinator.com. Unfortunately, I cannot recall the exact origin of the original source, nor was I able to find the author's name, so I am can't provide the appropriate credits.

Effective Engineer - Notes

By Edmond Lau
Highly Recommended 👍
http://www.theeffectiveengineer.com/

What's an Effective Engineer?

libp2p discovery options

Module name	node support	browser support	go support	works w/o rendezvous server	true P2P^[1]	works w/o bootstrap
libp2p-mdns	X	O	X	X	X	X
libp2p-railing^[2]	X	X	X^[3]	X	X	O
libp2p-kad-dht	X^[4]	X^[4]	X	X	X	O
libp2p-webrtc-star	X	X	O	O	X	O^[5]
libp2p-websocket-star	X	X	X	O	O	O^[5]

1. no tunnel required

2. this is essentially just bootstrapping, not discovery per se

3. via bootstrap config

4. disabled by default, see: libp2p/js-libp2p-kad-dht#86 and ipfs/js-ipfs#1982

5. you have to bootstrap the star itself

Instructions

Unofficial guide on deploying a custom Optimism rollup on Kovan

⚠️ Notice: Guide updated April 2021. Check out the Optimism discord for additional help and support.

Clone optimism contracts:

git clone [email protected]:ethereum-optimism/optimism.git

	# METEOR CORE:

	Anywhere: Meteor.isClient
	Anywhere: Meteor.isServer
	Anywhere: Meteor.startup(func)
	Anywhere: Meteor.absoluteUrl([path], [options])
	Anywhere: Meteor.settings
	Anywhere: Meteor.release

	// Update: Hey Folks - I've got a full Gulpfile with everything else over at https://github.com/wesbos/React-For-Beginners-Starter-Files

	var source = require('vinyl-source-stream');
	var gulp = require('gulp');
	var gutil = require('gulp-util');
	var browserify = require('browserify');
	var reactify = require('reactify');
	var babelify = require('babelify');
	var watchify = require('watchify');
	var notify = require('gulp-notify');

	// Only trigger enclosing computation if the return value of
	// f is not EJSON.equals to the previuous return value
	Tracker.guard = function(f) {
	if (Meteor.isServer \|\| !Tracker.currentComputation) {
	return f();
	}

	let dep = new Tracker.Dependency(),
	curView = Blaze.currentView,
	tplFunc = Template._currentTemplateInstanceFunc;