jesseruder

Starter apps:
Download http://expo.io/--/api/v2/versions/download-template/tabs or http://expo.io/--/api/v2/versions/download-template/blank
Extract and open in XDE

iOS Simulator build:
Download http://expo.io/--/api/v2/versions/download-ios-simulator-build
Extract to .app
Open simulator
`xcrun simctl install booted [PATH TO .app]`

developit

/** Async version of Array.prototype.reduce()
 *  await reduce(['/foo', '/bar', '/baz'], async (acc, v) => {
 *    acc[v] = await (await fetch(v)).json();
 *    return acc;
 *  }, {});
 */
export async function reduce(arr, fn, val, pure) {
  for (let i=0; i<arr.length; i++) {
    let v = await fn(val, arr[i], i, arr);
    if (pure!==false) val = v;

PaulKinlan

function monitorEvents(element) {
  var log = function(e) { console.log(e);};
  var events = [];
  
  for(var i in element) {
    if(i.startsWith("on")) events.push(i.substr(2));
  }
  events.forEach(function(eventName) { 
    element.addEventListener(eventName, log); 
  }); 

joepie91

By the way, I'm available for tutoring and code review :)

Table of contents

1. What Promises library should I use?
2. How do I create a Promise myself?
3. How do I use new Promise?
4. How do I resolve a Promise?
5. But what if I want to resolve a synchronous result or error?
6. [But what if it's at the start of a chain, and I'm not in a .then callback yet?](https://gist.github.com/joepie91/4c3a10629a4263a522e3bc4839a28c83#6-but

ericclemmons

Using <details> in GitHub

Suppose you're opening an issue and there's a lot noisey logs that may be useful.

Rather than wrecking readability, wrap it in a <details> tag!

<details>
 Summary Goes Here

graceavery

alias accio=wget
alias avadaKedavra='rm -f'
alias imperio=sudo
alias priorIncantato='echo `history |tail -n2 |head -n1` | sed "s/[0-9]* //"'
alias stupefy='sleep 5'
alias wingardiumLeviosa=mv

alias sonorus='set -v'
alias quietus='set +v'

jamischarles

#!/usr/bin/env bash #adding this to force silly gist highlighting. REMOVE THIS

# This is a modified version of the script generated by https://docs.npmjs.com/cli/completion to include `npm install` autocompletion.
# Basically we added `if` blocks to check for `install` subcommand.

###-begin-npm-completion-###
#
# npm command completion script
#
# Installation: npm completion >> ~/.bashrc  (or ~/.zshrc)

rcugut

DEPRECATED as of macOS 10.13 (High Sierra). See the new GUIDE to install nvm and yarn for macOS (updated July 2019)

Fixing npm On Mac OS X for Homebrew Users

Installing node through Homebrew can cause problems with npm for globally installed packages. To fix it quickly, use the solution below. An explanation is also included at the end of this document.

Solution

This solution fixes the error caused by trying to run npm update npm -g. Once you're finished, you also won't need to use sudo to install npm modules globally.

rauschma

// Demo: converting a thenable to a Promise

const fulfilledThenable = {
    then(reaction) {
        reaction('hello');
    }
};
const promise = Promise.resolve(fulfilledThenable);
console.log(promise instanceof Promise); // true
promise.then(x => console.log(x)); // hello

wesbos

# Put this in your .zshrc or .bashrc file
# Install `tree` first — brew install tree
function t() {
  # Defaults to 3 levels deep, do more with `t 5` or `t 1`
  # pass additional args after
  tree -I '.git|node_modules|bower_components|.DS_Store' --dirsfirst --filelimit 15 -L ${1:-3} -aC $2
}