park-brian’s gists

park-brian / importDynamoDBTable.js

Last active July 19, 2021 23:49

Uses parallel batchWrite requests to quickly load data into DynamoDB.

	function sleep(ms) {
	return new Promise((resolve) => setTimeout(resolve, ms));
	}

	async function insertDynamoDBItems(documentClient, tableName, items) {
	if (!items.length) return;
	let responses = [];

	let response = await documentClient
	.batchWrite({

park-brian / index.html

Last active July 6, 2021 15:39

Breast Cancer QQ Plot

	<!doctype html>
	<html lang="en">
	<head>
	<meta charset="utf-8">
	<title>GistRun</title>
	<link rel="stylesheet" href="styles.css">
	</head>
	<body>
	<h1>PLCO QQ Plot</h1>

park-brian / fromCsv.js

Last active June 2, 2021 15:24

CSV utilities

	/**
	* A parser which handles any rfc4180 compliant csv file
	* Configuration takes the following properties
	* delimiter: specifies the field delimiter (default: ",")
	* escape: specifies the escape character (default: ")
	* skipLines: specifies the number of lines to skip (default: 0)
	* transformRow: transform sthe default ouput from an array of strings to your custom format (eg: an array of objects)
	* transformValue: transforms individual values (eg: for custom typecasting logic)
	*/

park-brian / index.html

Last active August 11, 2021 19:00

RWS Editor Test Latest

	<!doctype html>
	<html lang="en">
	<head>
	<meta charset="utf-8">
	<title>GistRun</title>
	<link rel="stylesheet" href="styles.css">
	</head>
	<body>
	<input id="height" placeholder="Height">
	<input id="width" placeholder="Width">

park-brian / index.html

Last active January 30, 2021 20:12

RWS Editor Test 2

	<!doctype html>
	<html lang="en">
	<head>
	<meta charset="utf-8">
	<title>GistRun</title>
	<link rel="stylesheet" href="styles.css">
	</head>
	<body>
	<input id="height" placeholder="Height">
	<input id="width" placeholder="Width">

park-brian / QuadTree.js

Last active October 12, 2020 21:53

A simple quadtree for rapidly fetching spatial data

	/**
	* A simple quadtree for rapidly fetching spatial data
	* @param {number} xMin
	* @param {number} xMax
	* @param {number} yMin
	* @param {number} yMax
	*/
	function QuadTree(xMin, xMax, yMin, yMax) {
	// swap xMin/xMax and yMin/yMax if needed
	if (xMin > xMax) [xMin, xMax] = [xMax, xMin];

park-brian / editor.js

Last active June 23, 2020 14:56

HTML Editor Bookmarklet (highlight and drag into bookmarks bar)

data:text/html,<body oninput="document.querySelector('iframe').srcdoc=h.value+'<style>'+c.value+'</style><script>'+j.value+'</script>'"><style>textarea,iframe{box-sizing:border-box;float:right;width:100%;height:50%;border:1px solid steelblue;}body{margin:0}textarea{width:33.33%;font-size:18;resize:none;}</style><textarea placeholder=JS id=j></textarea><textarea placeholder=CSS id=c></textarea><textarea placeholder=HTML id=h></textarea><iframe>

park-brian / validate.js

Last active June 23, 2020 15:00

A simple utility to validate objects (based off the Angular validation api)

	function validate(object, rules) {
	return Object.entries(object).reduce((errors, [key, value]) => {
	let validators = rules[key];

	if (!validators \|\| validators.length === 0)
	return errors;

	if (typeof validators === 'function')
	validators = [validators];

park-brian / forEachPromise.js

Last active June 23, 2020 15:08

promise-utils

	/**
	* Sometimes, we need a plain es5 function to chain execution of promises (eg: when
	* targeting older browsers using polyfills, while eschewing a build step). This function
	* takes an array of promises or functions which return promises, and applies the supplied
	* callback function against each promise sequentially, waiting for resolution before
	* executing/resolving the next promise.
	*
	* Promises always resolve in their order of appearance. However, this function only
	* defers execution of promises if functions which return promises are provided (eg:
	* using .bind to create bound functions).

park-brian / router.js

Last active May 8, 2020 20:37

Regex Router

	/*
	Routing consists of matching a string against a set of regular expressions to call a function.
	In this case, we can define routes as an array of regular expressions and callbacks.
	For example:
	let routes = [
	[/^\/user\/(\d+)\/?$/, (id) => response({id})],
	[/^\/user\/([a-z0-9-_]+)\/?$/, (name) => response({name})],
	[/^\/user\/([a-z0-9-_]+)\/(\d+)\/?$/, (name, id) => response({id, name})],
	];

Brian Park park-brian