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const extractIds = items => items.map(item => item.id)

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const extractIds = items => {
  let itemIds = []

  for (let i=0; i<items.length; i++) {
    itemIds.push(items[i].id)
  }

  return itemIds
}

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export const useFirestoreCollectionQuery = (path, renderFn) => {
  const [state, setState] = useState(null)

  const collection = useRef(useFirestoreCollection(path))

  useEffect(() => {
    console.log('useEffect')
    return collection.current.onSnapshot(snapshot => {
      const docs = snapshot.docs.map(x => x.data())
      setState(docs)

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export const useFirestoreCollectionQuery = (path, renderFn) => {
  const [state, setState] = useState(null)

  const collection = useFirestoreCollection(path)

  useEffect(() => {
    console.log('useEffect')
    return collection.onSnapshot(snapshot => {
      const docs = snapshot.docs.map(x => x.data())
      setState(docs)

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export const useFirestoreCollectionQuery = (path, renderFn) => {
  const [state, setState] = useState(null)

  const collection = useFirestoreCollection(path)

  useEffect(() => {
    console.log('useEffect')
    return collection.onSnapshot(snapshot => {
      const docs = snapshot.docs.map(x => x.data())
      setState(docs)

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export const Counter = ({ initialValue, onChange }) => {
  const [count, setCount] = useState(initialValue)

  useEffect(() => onChange(count), [count])

  const incrementCounter = () => setCount(count + 1)

  return (
    <div>
      Count: {count}

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const mapExample = arr => arr.map(square)

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set nocompatible
filetype off

set rtp+=~/.vim/bundle/Vundle.vim
call vundle#begin()
Plugin 'gmarik/Vundle.vim'
Plugin 'tpope/vim-fugitive'
Plugin 'L9'
Plugin 'int3/vim-extradite'
Plugin 'scrooloose/syntastic'

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/* global Obniz */
import React from 'react'
import tokens from './tokens'

class RemoteDevice extends React.Component {
  state = { text: this.props.text || `id: ${this.props.id}` }

  componentDidMount () {
    const { id } = this.props
    const access_token = tokens[id]

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#include <ESP8266WiFi.h>

const char* ssid = "ssid";
const char* password = "password";

WiFiServer server(80);

String header;

int gpio_pins [] = { D0, D1, D2 };