guest271314

• V8

V8 is Google’s open source high-performance JavaScript and WebAssembly engine, written in C++. It is used in Chrome and in Node.js, among others. It implements ECMAScript and WebAssembly, and runs on Windows 7 or later, macOS 10.12+, and Linux systems that use x64, IA-32, ARM, or MIPS processors. V8 can run standalone, or can be embedded into any C++ application.

• SpiderMonkey

SpiderMonkey is Mozilla’s JavaScript and WebAssembly Engine, used in Firefox, Servo and various other projects. It is written in C++, Rust and JavaScript. You can embed it into C++ and Rust projects, and it can be run as a stand-alone shell. It can also be [compiled](https://bytecodealliance.org/articles/making-javascript-run-fast-on

reconbot

// Adapted from https://gist.github.com/jakubriedl/812c2a7b26927a2249a4719555d9a0ca
import DataLoader from 'dataloader'
import { Exchange, Operation } from 'urql'
import { pipe, map } from 'wonka'

interface BatchRequest {
  url: RequestInfo | string
  options?: RequestInit
}

threepointone

https://twitter.com/snookca/status/1073299331262889984?s=21

‪“‬In what way is JS any more maintainable than CSS? How does writing CSS in JS make it any more maintainable?”

‪Happy to chat about this. There’s an obvious disclaimer that there’s a cost to css-in-js solutions, but that cost is paid specifically for the benefits it brings; as such it’s useful for some usecases, and not meant as a replacement for all workflows. ‬

‪(These conversations always get heated on twitter, so please believe that I’m here to converse, not to convince. In return, I promise to listen to you too and change my opinions; I’ve had mad respect for you for years and would consider your feedback a gift. Also, some of the stuff I’m writing might seem obvious to you; I’m not trying to tell you if all people of some of the details, but it might be useful to someone else who bumps into this who doesn’t have context)‬

So the big deal about css-in-js (cij) is selectors.

swalkinshaw

Moved to Shopify/graphql-design-tutorial

sebmarkbage

The Rules of React

All libraries have subtle rules that you have to follow for them to work well. Often these are implied and undocumented rules that you have to learn as you go. This is an attempt to document the rules of React renders. Ideally a type system could enforce it.

What Functions Are "Pure"?

A number of methods in React are assumed to be "pure".

On classes that's the constructor, getDerivedStateFromProps, shouldComponentUpdate and render.

cathyxz

iOS restrictions re: bringing up the keyboard on programmatic focus

I can't find exact specifications on this, but it seems that iOS restricts bringing up the keyboard via programmatically focusing on <input>. It only brings up the keyboard in response to explicit user interaction.

1. iOS focus on input field only brings up keyboard when called inside a click handler.
2. It doesn’t work if the focus is async.

This presents a curious problem when you want to autofocus an input inside a modal or lightbox, since what you generally do is click on a button to bring up the lightbox, and then focus on the input after the lightbox has been opened. Without anything fancy, it actually works ok. The problem shows up when you try to add something fancy like a setTimeout or a promise.then(). I don't know why people would want to use a setTimeout here, but waiting for a promise is actually a pretty common use case. E.g. we try to batch dom manipulations like getting a lightbox to show up inside `requestAnimati

dimkir

Running nightmare on Amazon Linux

You may have thought of running nightmare on AWS Lambda. But before we can run it on Lambda, we need first to make it run on Amazon Linux.

Provision instance which replicates Lambda environment

According to AWS Documentation on Lambda Execution Environment and available Libraries we would need this AMI image with this alias amzn-ami-hvm-2016.03.3.x86_64-gp2. Keep in mind that AMI-image-id for this instance would be different in different regions (eg):

• In eu-west-1 - ami-f9dd458a
• In us-east-1 - ami-6869aa05

iscgar

#!/usr/bin/sudo ruby

# 
# revealer.rb -- Deobfuscate GHE .rb files.
# 
# This is simple:
# Every obfuscated file in the GHE VM contains the following code:
# 
# > require "ruby_concealer.so"
# > __ruby_concealer__ "..."

techgaun

Last updated: 2017-03-22 : Update to 1.2.2

The following assumes you're executing as a root user

Pre-install

yum update
yum install -y git
mkdir -p /opt/influx/{wal,data,ssl}

bomberstudios

This is what Craft does:

function loadFramework(pluginRoot) {
  if (NSClassFromString('PanelsManager') == null) {
    var mocha = [Mocha sharedRuntime];
    return [mocha loadFrameworkWithName:'Panels' inDirectory:pluginRoot];
  } else {
    return true;
 }