juice49

function promiseOnce () {
  let promise = null

  return function (createPromise) {
    if (promise) {
      return promise
    }

    promise = createPromise()

juice49

.u-ratio
  --ratioX 1
  --ratioY 1
  position relative

  &:before
    display block
    padding-top calc(var(--ratioY) / var(--ratioX) * 100%)
    content ''

juice49

const log = (...message) =>
  console.log.apply(console, [ '[PREFIX]', ...message ])

log('foo', 'bar', 'bat', 1, 2, 3)

// [PREFIX] foo bar bat 1 2 3

juice49

<?php

function l ($name) {
	return function ($line) use ($name) {
		file_put_contents($name, $line . PHP_EOL, FILE_APPEND);
	};
}

juice49

<?php

function b () {
	$start = microtime(true);
	return function () use ($start) {
		$end = microtime(true);
		return $end - $start;
	};
}

juice49

'use strict';

const timeoutPromise = ms => promise => new Promise((resolve, reject) => {
  const timeout = setTimeout(() => {
    reject(new PromiseTimeout());
  }, ms);
  promise.then(
    res => {
      clearTimeout(timeout);
      resolve(res);

juice49

const delay = delayPromise(1000)
delay(() => fetch('/'))
  .then(console.log)

juice49

/*
 * !!! IMPORTANT !!!
 * This has been modified to accept "onRemove" and "onAppend" callbacks.
 * See comments 1, 2, and 3.
 */
/*! appendAround markup pattern. [c]2012, @scottjehl, Filament Group, Inc. MIT/GPL
how-to:
	1. Insert potential element containers throughout the DOM
	2. give each container a data-set attribute with a value that matches all other containers' values
	3. Place your appendAround content in one of the potential containers

juice49

function routeWebsocket(server, controllers = []) {
  server.on('connection', client => {
    client.on('message', ({ event, data }) => {
      const controller = controllers[event];
      if(controller) {
        controller(data);
      }
    });
  });
}

juice49

hashmark

HashMark is a small utility which takes a file (or sdtin) as input, and writes the contents of the input to a file named with a hash digest of the file.

#npm-run-all A CLI tool to run multiple npm-scripts in parallel or sequential.