joe-oli

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what the flock? no status to report, i am not a facebook junkie.

joe-oli / class-vs-functional-component.js

Last active March 20, 2020 12:33

React - Class vs Functional component

	//--before
	class Brief extend React.Component {
	render() {
	let {post} = this.props

	return (
	<div className="brief">
	<Link to={`/apps/blog/posts/${post._id}`} className="title">
	<strong>{post.title}</strong>
	</Link>

joe-oli / truthy-vs-falsy-in-javascript.txt

Created March 19, 2020 02:15

Truthy vs Falsy in JS

	From http://www.sitepoint.com/javascript-truthy-falsy/

	The following values are always falsy:

	* false
	* 0 (zero)
	* "" (empty string)
	* null
	* undefined
	* NaN (a special Number value meaning Not-a-Number!)

joe-oli / LookupDescByCode.js

Created March 19, 2020 02:03

Lookup corresponding Description, given a Code

	/* Usage:
	node LookupDescByCode
	You can ommit '.js'
	Using a constant lookup Structure (either Array or Obj), fetch the Code+Desc, given the Code.
	*/

	const CodeDescArrMap = [
	{Code: 'Z101', Desc: "Apples"},
	{Code: 'Z201', Desc: "Bananas"},
	{Code: 'Z301', Desc: "Oranges"}

joe-oli / ajax-fetch-axios.txt

Created March 11, 2020 05:30

ajax fetch and axios

	<script>
	$(function(){
	$.ajax(
	{
	type: "POST",
	url: "https://testapi.XXXXXXXX.com/auth",
	data: {
	username:'TestUser',
	password: 'TestPwd'
	},

joe-oli / testplayer.java

Created March 10, 2020 09:41

randomly play mp3 file in java

	/*
	* Download from http://www.javazoom.net/javalayer/sources.html
	* Unarchive JLayer into source directory
	*
	* Build with something like:
	* javac -classpath JLayer1.0.1/classes/ RandomMP3Player.java
	* Run with something like:
	* java -classpath .:jl1.0.1.jar RandomMP3Player 10 z.mp3 1.mp3
	*
	*/

joe-oli / promise-async-await-example.js

Last active February 28, 2020 01:07

async-await example vs promise

	/* in both cases, wire the `handleSubmit` FN in the html.form onSubmit event
	<form onSubmit={this.handleSubmit}>
	<input old pwd
	<input new pwd
	<input confirm pwd
	<button etc
	</form>
	*/

	//ALT #1: use Promise.then().catch() syntax

joe-oli / LINQ-and-List-methods.txt

Last active February 20, 2020 05:12

LINQ and List methods

	Just for reference, here is a table of some old .NET 2 style List<> instance methods, and their equivalent extension methods in Linq:

	METHOD IN List<> METHOD IN Linq
	------------------------------------------------------------------------------------------

	list.Contains(item) query.Contains(item)

	list.Exists(x => x.IsInteresting()) query.Any(x => x.IsInteresting())
	list.TrueForAll(x => x.IsInteresting()) query.All(x => x.IsInteresting())

joe-oli / ExpandoObject-example.cs

Last active February 20, 2020 02:55

dynamic and ExpandoObject

	dynamic x = new ExpandoObject();
	x.NewProp = string.Empty;
	Alternatively:

	var x = new ExpandoObject() as IDictionary<string, Object>;
	x.Add("NewProp", string.Empty);

	//=============
	IDictionary<string, object> expando = new ExpandoObject();
	expando["foo"] = "bar";

joe-oli / ExpandoObject-example.cs

Created February 20, 2020 02:13

dynamic and ExpandoObject

	IDictionary<string, object> expando = new ExpandoObject();
	expando["foo"] = "bar";

	dynamic d = expando;
	Console.WriteLine(d.foo); // bar

	//Example use case, convert XML payload. loop over the elements, e.g.

	var doc = XDocument.Load(file);
	IDictionary<string, object> expando = new ExpandoObject();

joe-oli / compare-arrays.js

Created February 19, 2020 12:38

Compare arrays return true/false

	//test #1: exactly the same.
	let myArrayA = [
	{periodSeqNo: 30010, period_month :'jan 2020', start_date: '2020-01-01', end_date: '2020-01-31', opening_bal: 350000.11, opening_rate: 3.100, int_amount_charged: 255.10},
	{periodSeqNo: 30020, period_month :'feb 2020', start_date: '2020-02-01', end_date: '2020-02-29', opening_bal: 360000.12, opening_rate: 3.200, int_amount_charged: 255.20},
	{periodSeqNo: 30030, period_month :'mar 2020', start_date: '2020-03-01', end_date: '2020-03-31', opening_bal: 370000.13, opening_rate: 3.300, int_amount_charged: 255.30},
	];
	let myArrayB = [
	{periodSeqNo: 30010, period_month :'jan 2020', start_date: '2020-01-01', end_date: '2020-01-31', opening_bal: 350000.11, opening_rate: 3.100, int_amount_charged: 255.10},
	{periodSeqNo: 30020, period_month :'feb 2020', start_date: '2020-02-01', end_date: '2020-02-29', opening_bal: 360000.12, opening_rate: 3.200, int_amount_charged: 255.20},
	{periodSeqNo: 30030, period_month :'mar 2020', start_date: '2020-03-01', end_date: '2020-03-31',