Rich-Harris

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.

andrewrk

Zig 0.371 sec
C 0.604 sec


implementations of the RNG are equivalent implementations of MT64

note: I achieved the same performance with zig and C when I used clang with -O3 -fomit-frame-pointer and LTO.

rondy

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?

jevakallio

import Exponent from 'exponent';
import React from 'react';
import { range } from 'lodash';

import {
  StyleSheet,
  Dimensions,
  ScrollView,
  Animated,
  Text,

ljharb

Array Iteration

https://gist.github.com/ljharb/58faf1cfcb4e6808f74aae4ef7944cff

While attempting to explain JavaScript's reduce method on arrays, conceptually, I came up with the following - hopefully it's helpful; happy to tweak it if anyone has suggestions.

Intro

JavaScript Arrays have lots of built in methods on their prototype. Some of them mutate - ie, they change the underlying array in-place. Luckily, most of them do not - they instead return an entirely distinct array. Since arrays are conceptually a contiguous list of items, it helps code clarity and maintainability a lot to be able to operate on them in a "functional" way. (I'll also insist on referring to an array as a "list" - although in some languages, List is a native data type, in JS and this post, I'm referring to the concept. Everywhere I use the word "list" you can assume I'm talking about a JS Array) This means, to perform a single operation on the list as a whole ("atomically"), and to return a new list - thus making it mu

chourobin

Bridging Native & React for iOS & Android

js -> native

• Simple Example
• Callbacks
• Promises
• Properties

native -> js

kiok46

Native Module in React-Native

To get a great grip on how wo build one, read these blogs.

• https://github.com/peggyrayzis/react-native-create-bridge
• https://shift.infinite.red/beginner-s-guide-to-using-cocoapods-with-react-native-46cb4d372995
• http://moduscreate.com/swift-modules-for-react-native/
• http://browniefed.com/blog/react-native-how-to-bridge-an-objective-c-view-component/
• http://brentvatne.ca/react-native-view-component-1/
• http://brentvatne.ca/react-native-view-component-2/

nodkz

/* @flow */
/* eslint-disable */

import mongoose from 'mongoose';

export type MongoId = typeof mongoose.Types.ObjectId | {
  toString(): string,
};
export type MongoOrScalarId = MongoId | string | number;

busypeoples

//
// MIT License
//
// Copyright (c) 2018 Ali Sharif
//
// 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

busypeoples

//
// MIT License
//
// Copyright (c) 2018 Ali Sharif
//
// 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