djanowski

function useMatchMedia(query) {
  const mediaQuery = useMemo(() => window.matchMedia(query), [ query ]);
  const [ matches, setMatches ] = useState(mediaQuery.matches);

  useEffect(() => {
    function onChange({ matches: newMatches }) {
      setMatches(newMatches);
    }

    if (mediaQuery.addEventListener)

djanowski

# Removing old Rubies in preparation for RVM

/usr/bin/gem list | awk '{ print $1 }' | xargs /usr/bin/gem uninstall -a --install-dir=/Library/Ruby/Gems/1.8 --bindir=/usr/bin
/usr/bin/gem list | awk '{ print $1 }' | xargs /usr/bin/gem uninstall -a --install-dir /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/gems/1.8 --bindir=/usr/bin

/opt/local/bin/gem list | awk '{ print $1 }' | xargs /opt/local/bin/gem uninstall -a

for file in $(find /usr/bin -type f); do (head -n1 $file | grep '^#.*ruby' > /dev/null) && echo $file && rm $file; done

port installed | ack '^(j?ruby|rb\-)' | awk '{ print $1, $2 }' | xargs port uninstall

djanowski

$ cd doc
$ wget --mirror --no-host-directories --adjust-extension --convert-links --page-requisites -e robots=off --span-hosts --domains heroku.com,googleapis.com http://redis-io.heroku.com

djanowski

// Throttles an async function.
function throttleAsync(fn, wait) {
  let lastRun    = 0;
  let currentRun = null;

  async function throttled(...args) {
    if (currentRun)
      return currentRun;

    const currentWait = lastRun + wait - Date.now();

djanowski

// Concurrently transform a MongoDB cursor into a stream of bulk MongoDB updates.
//
// Usage:
//
// const users         = db.collection('users');
// const usersToUpdate = users.find({ email: null });
//
// await eachAsyncUpdate(users, usersToUpdate, async function(user) {
//   const userEmail = await findUserEmail(user);
//

djanowski

AL America/Chicago
AK America/Anchorage
AS Pacific/Samoa
AZ America/Denver
AR America/Chicago
CA America/Los_Angeles
CO America/Denver
CT America/New_York
DE America/New_York
DC America/New_York

djanowski

require 'rubygems'
require "sinatra"

enable :sessions
#use Rack::Session::Cookie
#use Rack::Session::Pool

  get '/' do
    if session[:username]
      "hi, #{session[:username]}"

djanowski

#!/usr/bin/env bash

# Monitors your tree and runs tests when anything changes.
#
# `make`, `yarn test`, etc. automatically detected.
#
#   $ autotest
#
# Run a specific command on changes:
#

djanowski

#!/usr/bin/env bash

# Monitors your tree and runs tests when anything changes.
#
# `make`, `yarn test`, etc. automatically detected.
#
#   $ autotest
#
# Run a specific command on changes:
#

djanowski

#!/usr/bin/env bash

# Monitors your tree and runs tests when anything changes.
#
# `make`, `yarn test`, etc. automatically detected.
#
#   $ autotest
#
# Run a specific command on changes:
#