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

ornicar

/* FOR THE BROWSER
Utility function to read a ND-JSON HTTP stream.
`processLine` is a function taking a JSON object. It will be called with each element of the stream.
`response` is the result of a `fetch` request.
See usage example in the next file.
*/

const readStream = processLine => response => {
  const stream = response.body.getReader();
  const matcher = /\r?\n/;

therightstuff

// A UUID is a 128-bit number which is too large to be represented as a native integer in Javascript.
// The original solution I posted (based on https://github.com/uuidjs/uuid#uuidparsestr ) wasn't good,
// as it converted the given UUID into a byte array and then selected only the first four bytes to be
// used as the integer.

const uuid = require('uuid');

let convertGuidToInt = (uuid) => {
    // parse accountId into Uint8Array[16] variable
    let parsedUuid = uuid.parse(uuid);

raiph

Then mathematical neatness became a goal and led to pruning some features from the core of the language.

— John McCarthy, History of Lisp

If you prefer programming languages with a tidy and tiny core, you're in for a treat. This article drills down to the singleton primitive at the heart of Raku's metamodel ("model of a model") of a model of computation ("how units of computations, memories, and communications are organized")¹.

The reason I've written this article

It began with u/faiface's reddit post/thread "I'm impressed with Raku"². One of their sentences in particular stood out for me:

wongjiahau

/*
Funcords is a feature that combine functions and records.

If you think about it, record is actually a dependently typed function, 
where the output type depends on the input type.

For example,

  r = {'x': 1, 'y': 'yo'}
  

GottZ

const sass = require('node-sass');

// related: https://github.com/UnwrittenFun/svelte-vscode/issues/1

module.exports = {
	preprocess: {
		style: async ({ content, attributes }) => {
			if (!['text/sass', 'text/scss'].some(attributes.type) && !['sass', 'scss'].some(attributes.lang)) return;

			return new Promise((resolve, reject) => {

atoponce

Cryptographic Best Practices

Putting cryptographic primitives together is a lot like putting a jigsaw puzzle together, where all the pieces are cut exactly the same way, but there is only one correct solution. Thankfully, there are some projects out there that are working hard to make sure developers are getting it right.

The following advice comes from years of research from leading security researchers, developers, and cryptographers. This Gist was [forked from Thomas Ptacek's Gist][1] to be more readable. Additions have been added from

brentvatne

/**
 * Sample React Native App
 * https://github.com/facebook/react-native
 */

import React, { Component } from 'react';
import {
  AppRegistry,
  StyleSheet,
  Text,

pascaldekloe

// This is free and unencumbered software released into the public domain.

// Marshals a string to an Uint8Array.
function encodeUTF8(s) {
	var i = 0, bytes = new Uint8Array(s.length * 4);
	for (var ci = 0; ci != s.length; ci++) {
		var c = s.charCodeAt(ci);
		if (c < 128) {
			bytes[i++] = c;
			continue;

brentvatne

NavigationExperimental notes

Containers

RootNavigationContainer

• You pass the reducer to this, it actually ultimately receives all navigation calls via onNavigate, which is mostly equivalent to Redux dispatch. It setState and persisting state. it is like the redux "store"