kconner

macOS Internals

Understand your Mac and iPhone more deeply by tracing the evolution of Mac OS X from prelease to Swift. John Siracusa delivers the details.

Starting Points

How to use this gist

You've got two main options:

sophiebits

const {useCallback, useEffect, useReducer, useRef} = require('react');

let effectCapture = null;

exports.useReducerWithEmitEffect = function(reducer, initialArg, init) {
  let updateCounter = useRef(0);
  let wrappedReducer = useCallback(function(oldWrappedState, action) {
    effectCapture = [];
    try {
      let newState = reducer(oldWrappedState.state, action.action);

etienne-dldc

import React from 'react';

function onlyChild(children) {
  return Array.isArray(children) ? children[0] : children;
}

export function combineContext(contexts) {
  class Provider extends React.Component {
    render() {
      const init = this.props.children;

enricofoltran

package main

import (
	"context"
	"flag"
	"fmt"
	"log"
	"net/http"
	"os"
	"os/signal"

ruanbekker

Master: Dependencies

apt update && apt upgrade -y
curl https://packages.cloud.google.com/apt/doc/apt-key.gpg | apt-key add -

cat <<EOF > /etc/apt/sources.list.d/kubernetes.list
deb http://apt.kubernetes.io/ kubernetes-xenial main
EOF

djspiewak

Thread Pools

Thread pools on the JVM should usually be divided into the following three categories:

1. CPU-bound
2. Blocking IO
3. Non-blocking IO polling

Each of these categories has a different optimal configuration and usage pattern.

montanaflynn

package main

import (
	"fmt"
	"net/http"
	"sort"
	"time"
)

// a struct to hold the result from each request including an index

threepointone

[based on a true story]

So. Your friend's about to teach you how to make a website. Great!

You make a file, and you save it as 'index.html'. Why it's called 'index' isn't really explained to you, but whatever.

You type the following.

hello world

kentcdodds

slice-js

So far...

A talk by @inconshreveable at The Strange Loop 2016 called "Idealized Commit Logs: Code Simplification via Program Slicing" about the amazing tools that can be built with program slicing inspired me to work on this project. Learn more about program slicing here.

This is actual output from slice-js (not yet open source), a program slicing tool that I'm working on right now. I can't wait to work out more kinks, make it more practically useful and show it to you all!

The match-sorter.js file is the transpiled CommonJS version of match-sorter and you can find that here.

acdlite

// getComponent is a function that returns a promise for a component
// It will not be called until the first mount
function asyncComponent(getComponent) {
  return class AsyncComponent extends React.Component {
    static Component = null;
    state = { Component: AsyncComponent.Component };

    componentWillMount() {
      if (!this.state.Component) {
        getComponent().then(Component => {