johnpolacek’s gists

johnpolacek / stockBuySell.js

Last active August 31, 2020 16:52

Given an array of numbers that represent stock prices (where each number is the price for a certain day), find 2 days when you should buy and sell your stock for the highest profit.

	const stockBuySell = (days) => {
	const best = days.reduce((bestResult, price, i) => {
	const buyDays = days.slice(i+1)
	if (buyDays.length) {
	const highest = Math.max.apply(null, days.slice(i+1))
	const roi = highest - price
	if (roi > bestResult.roi) {
	bestResult = {buyDay: i, sellDay: days.indexOf(highest), roi}
	}
	}

johnpolacek / prettier.package.json

Created August 15, 2020 02:25

NPM prettier format and format-watch script

	{
	"scripts": {
	"format": "prettier --write \"*/.{js,jsx,json,md}\"",
	"format-watch": "npm run format && onchange \"*/.{js,jsx,json,md}\" -- prettier --write {{changed}}",
	},
	"devDependencies": {
	"onchange": "^7.0.2",
	"prettier": "^2.0.5"
	}
	}

johnpolacek / _app.js

Created May 17, 2020 20:54

Moving your context providers into _app.js prevents re-rendering of your context consuming components when navigating between pages in Next.js.

	import { ThemeProvider } from "theme-ui"
	import theme from "../components/theme"
	import { UserProvider } from "../components/context/UserContext"

	function MyApp({ Component, pageProps }) {
	return (
	<ThemeProvider theme={theme}>
	<UserProvider user={pageProps.user}>
	<Component {...pageProps} />
	</UserProvider>

johnpolacek / React component for controlling widows in line breaks in your text

Created February 24, 2019 21:34

	import React from 'react'

	export default (props) => {
	const words = props.children.split(' ')
	return <>{words.map((word, i) => word + (i > words.length-((props.widows \|\| 1)+1) ? '\u00a0' : ' ')).join('')}</>
	}

johnpolacek / ResponsiveWidows.js

Created February 24, 2019 21:33

React component for controlling widows for responsive line breaks in your text

	import PropTypes from 'prop-types'
	import React from 'react'

	class ResponsiveWidows extends React.Component {
	constructor() {
	super()
	this.state = {}
	}

	componentDidMount() {

johnpolacek / jsrender.loadTemplates.js

Created June 2, 2017 12:10

Load and cache multiple external jsrender templates

	function loadTemplates() {
	var toLoad = [],
	loadAll = $.Deferred();

	$.each(arguments, function(i, templateName) {
	var filepath = '/path/to/templates/' + templateName + '.html',
	loadTemplate = $.Deferred();

	toLoad.push(loadTemplate);

johnpolacek / gist:c7b4a1807623fb84173e

Created May 30, 2015 13:38

Selenium Wait For Page Load

	public static void waitForPageLoad(WebDriver drv) {
	sleep(50); // Make sure new page init has started...
	try {
	(new WebDriverWait(drv, 5))
	.until(new ExpectedCondition<Boolean>() {
	public Boolean apply(WebDriver d) {
	return ((JavascriptExecutor)d).executeScript("return document.readyState").equals("complete");
	}
	});
	} catch (TimeoutException ex) {

johnpolacek / .gitconfig

Last active March 8, 2025 22:15

My current .gitconfig aliases

	[alias]
	recent = "!git for-each-ref --sort=-committerdate refs/heads/ --format='%(committerdate:short) %(refname:short)' \| head -n 10"
	co = checkout
	cob = checkout -b
	coo = !git fetch && git checkout
	br = branch
	brd = branch -d
	brD = branch -D
	merged = branch --merged
	st = status

johnpolacek / Fun Data-Binding with jQuery

Last active August 29, 2015 13:59

Simple jQuery Pattern for doing cool data-binding stuff using jQuery.on() and jQuery.trigger() - see the demo at http://cdpn.io/mhCai

	<!DOCTYPE html>
	<html lang="en">
	<head>
	<meta charset="utf-8">
	<title>title</title>
	</head>
	<body>
	<p>Simple jQuery Pattern for doing cool data-binding stuff using <code>jQuery.on()</code> and </code>jQuery.trigger()</code></p>
	<h1>Messages</h1>
	<div id="output"></div>

johnpolacek / imageFill.js

Last active February 6, 2018 16:47

The jQuery plugin for making an image fill its container (and be centered) - see http://johnpolacek.github.io/imagefill.js/

	/**
	* imageFill.js
	* Author & copyright (c) 2013: John Polacek
	* Dual MIT & GPL license
	*
	* This gist is out of date now. I've turned this into a proper Github project at http://johnpolacek.github.io/imagefill.js/
	*
	*/
	;(function($) {

John Polacek johnpolacek