B . bryanbanda

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.~~

This is explaining stuff relevant to AOC 2021 day 6

How is a matrix used to count fish?

First lets do fibonacci numbers because it's smaller (2x2 matrix instead of 9x9) and it's familiar ground.

So you can implement fibs like this:

def fib(n):

INTRO

Concurrency is a domain I have wanted to explore for a long time because the locks and the race conditions have always intimidated me. I recall somebody suggesting concurrency patterns in golang because they said "you share the data and not the variables".

Amused by that, I searched for "concurrency in golang" and bumped into this awesome slide by Rob Pike: https://talks.golang.org/2012/waza.slide#1 which does a great job of explaining channels, concurrency patterns and a mini-architecture of load-balancer (also explains the above one-liner).

Let's dig in:

	//
	// DotPatternView.swift
	// x.com/mickces
	//
	// Created by mick on 4/27/25.
	//

	import SwiftUI

	public struct DotPatternView: View {

	import SwiftUI

	extension Color {
	static var background: Color {
	return Color(uiColor: .systemBackground)
	}

	static var secondaryBackground: Color {
	return Color(uiColor: .secondarySystemBackground)
	}

	<html>
	<head>
	<title>Stripe Gradient</title>
	</head>
	<body>
	<canvas id="gradient-canvas" data-js-darken-top data-transition-in>
	<!--
	Remove data-js-darken-top to keep the same brightness in the upper part of the canvas
	-->
	</canvas>

	# On slow systems, checking the cached .zcompdump file to see if it must be
	# regenerated adds a noticable delay to zsh startup. This little hack restricts
	# it to once a day. It should be pasted into your own completion file.
	#
	# The globbing is a little complicated here:
	# - '#q' is an explicit glob qualifier that makes globbing work within zsh's [[ ]] construct.
	# - 'N' makes the glob pattern evaluate to nothing when it doesn't match (rather than throw a globbing error)
	# - '.' matches "regular files"
	# - 'mh+24' matches files (or directories or whatever) that are older than 24 hours.
	autoload -Uz compinit


	# Some of these settings came from http://cheat.errtheblog.com/s/git
	[alias]
	br = branch
	brav = branch -avv
	brv = branch -vv
	ci = commit
	co = checkout
	contributors = shortlog -se
	df = diff

	# Copyright 2017, Google, Inc.
	# Licensed under the Apache License, Version 2.0 (the "License")
	FROM node:6-onbuild
	EXPOSE 3000
	ENV LANGUAGE English
	ENV API_KEY 123-456-789

	# set the base image to Debian
	# https://hub.docker.com/_/debian/
	FROM debian:latest

	# replace shell with bash so we can source files
	RUN rm /bin/sh && ln -s /bin/bash /bin/sh

	# update the repository sources list
	# and install dependencies
	RUN apt-get update \

B . bryanbanda

Stuff I wish I'd known sooner about service workers

Use Canary for development instead of Chrome stable

How is a matrix used to count fish?

INTRO

Goroutines