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krfong916 / ddd_and_boundaries.java

Created February 28, 2019 07:01

Two topics covered here, DDD and domain model boundary

	public void SubmitOrder(OrderData data) {
	var customer = GetCustomer(data.CustomerId);
	var sendEmail = delegate { /* send email */ };
	// call the domain model for the rest of the regular order submit logic customer.BecamePreferred -= sendEmail;
	// to avoid leaking memory
	customer.BecamePreferred += sendEmail;
	}


	public class CustomerBecamePreferredHandler : Handles<CustomerBecamePreferred> {

krfong916 / class_and_static_keyword.js

Last active May 31, 2019 21:17

es6 classes, prototypical inheritance, static keyword

	class Food {
	static isHealthy() {
	return true
	}
	static isEdible() { // references it's own class
	return this.isHealthy()
	}
	}

	console.log(Food.isEdible())

krfong916 / gist:ef92adbcba573372735fc117d110c69b

Created January 8, 2019 05:54

event loop example, tasks, queueing

	// what is the order of the statements logged to the console?

	console.log('script start');

	setTimeout(function() {
	console.log('setTimeout');
	}, 0);

	Promise.resolve().then(function() {
	console.log('promise1');

krfong916 / index.html

Created January 5, 2019 01:53

JS Bin // source https://jsbin.com/wiliwoq

	<!DOCTYPE html>
	<html>
	<head>
	<meta charset="utf-8">
	<title>JS Bin</title>
	<script src="https://cdnjs.cloudflare.com/ajax/libs/redux/3.3.1/redux.js"></script>
	<script src="https://fb.me/react-with-addons-0.14.7.js"></script>
	<script src="https://fb.me/react-dom-0.14.7.js"></script>
	<script src="https://cdnjs.cloudflare.com/ajax/libs/react-redux/4.4.0/react-redux.js"></script>
	<link href='https://fonts.googleapis.com/css?family=Open+Sans:600,700' rel='stylesheet' type='text/css'>

krfong916 / prototypal_object_creation_1.js

Created November 30, 2018 06:41

prototypal object creation with change of property

	function sideEffects() {
	console.log("this will have a side effect because thats how the object prototype mechanism just works");
	}

	var User = function({first_name, last_name, language, num_friends, num_reports, college, active}) {
	var obj = Object.create(User.prototype)

	obj.first_name = first_name
	obj.last_name = last_name
	obj.language = language

krfong916 / object_prototype_constructor_call.js

Created November 30, 2018 05:39

Ways not to instantiate an object

	function sideEffects() {
	console.log("this will have a side effect because thats how the object prototype mechanism just works");
	}

	function Bar () {
	console.log(`hey no side effects, we're all good!`);
	}

	Bar.prototype = new sideEffects();

krfong916 / gist:2a4a0a7429612a3b64b01bd1e64e8012

Created November 13, 2018 23:59

lexical this and this properties

	// lexical this and this properties
	function test() {
	setTimeout(() => {
	console.log(this.a)
	}, 1000);
	}

	let a = 2;
	test();

krfong916 / index.html

Created October 10, 2018 06:18

JS Bin // source https://jsbin.com/murobul

	<!DOCTYPE html>
	<html>
	<head>
	<meta charset="utf-8">
	<meta name="viewport" content="width=device-width">
	<title>JS Bin</title>
	</head>
	<body>

	<script id="jsbin-javascript">

krfong916 / index.html

Created August 8, 2018 23:09

JS Bin // source http://jsbin.com/gizopez

	<!DOCTYPE html>
	<html>
	<head>
	<meta charset="utf-8">
	<meta name="viewport" content="width=device-width">
	<title>JS Bin</title>
	</head>
	<body>

	<script id="jsbin-javascript">

krfong916 / index.html

Created August 8, 2018 23:03

// source http://jsbin.com

	<!DOCTYPE html>
	<html>
	<head>
	<meta charset="utf-8">
	<meta name="viewport" content="width=device-width">
	<title>JS Bin</title>
	</head>
	<body>

	<script id="jsbin-javascript">