John Polacek johnpolacek
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.
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| 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
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| { | |
| "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.
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| 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
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| 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
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| 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
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| function loadTemplates() { | |
| var toLoad = [], | |
| loadAll = $.Deferred(); | |
| $.each(arguments, function(i, templateName) { | |
| var filepath = '/path/to/templates/' + templateName + '.html', | |
| loadTemplate = $.Deferred(); | |
| toLoad.push(loadTemplate); |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| 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) { |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| [alias] | |
| co = checkout | |
| cob = checkout -b | |
| coo = !git fetch && git checkout | |
| br = branch | |
| brd = branch -d | |
| brD = branch -D | |
| merged = branch --merged | |
| st = status | |
| aa = add -A . |
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
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| <!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/
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| /** | |
| * 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($) { |