lmzach09’s gists

lmzach09 / convert-object-to-json-string.js

Last active July 27, 2019 04:15

Object To String Fail with toString

	let obj = { "key": "value" };
	let myString = obj.toString();
	console.log(myString);

	// '[object Object]'

lmzach09 / convert-object-to-json-string.js

Created July 27, 2019 04:16

Object to JSON string Success in JavaScript

	let obj = { "key": "value" };
	let myString = JSON.stringify(obj);
	console.log(myString);

	// '{"key":"value"}'

lmzach09 / json-stringify-formatted-spaces.js

Last active July 27, 2019 19:00

Stringify a JS object to JSON string with 4 spaces formatting

	let obj = { "key": "value" };
	let myString = JSON.stringify(obj, null, 4); // 4 space indentations
	console.log(myString);

	// {
	// "key": "value"
	// }

lmzach09 / json-stringify-formatted-tabs.js

Created July 27, 2019 04:21

Stringify a JS object to JSON string with tab formatting

	let obj = { "key": "value" };
	let myString = JSON.stringify(obj, null, '\t'); // tab
	console.log(myString);

	// {
	// "key": "value"
	// }

lmzach09 / json-parse-example.js

Last active July 27, 2019 04:23

Parsing a JSON string to JavaScript object example

	let str = '{ "a": 123 }';
	let obj = JSON.parse(str);
	console.log(obj);

	// { a: 123 }

lmzach09 / isolate-import-example.dart

Created August 5, 2019 05:08

Imports needed for Dart/Flutter Isolates, which is asynchronous code that runs in a separate thread.

	import 'dart:async';
	import 'dart:isolate';

lmzach09 / isolate-initializer.dart

Created August 5, 2019 05:12

An init function for creating a Dart/Flutter Isolate. It returns the SendPort so the main thread can send messages to the Isolate. It also listens for messages passed from the Isolate.

	Future<SendPort> initIsolate() async {
	Completer completer = new Completer<SendPort>();
	ReceivePort isolateToMainStream = ReceivePort();

	isolateToMainStream.listen((data) {
	if (data is SendPort) {
	SendPort mainToIsolateStream = data;
	completer.complete(mainToIsolateStream);
	} else {
	print('[isolateToMainStream] $data');

lmzach09 / isolate-function.dart

Last active August 6, 2019 02:03

This is a function that a Dart Isolate can execute. It will listen for messages from the main thread and also send messages to the main thread.

	void myIsolate(SendPort isolateToMainStream) {
	ReceivePort mainToIsolateStream = ReceivePort();
	isolateToMainStream.send(mainToIsolateStream.sendPort);

	mainToIsolateStream.listen((data) {
	print('[mainToIsolateStream] $data');
	});

	isolateToMainStream.send('This is from myIsolate()');
	}

lmzach09 / dart-main-function.dart

Created August 6, 2019 02:08

This Dart main function kicks off an async function to set up a second thread using the Isolate class.

	void main() async {
	SendPort mainToIsolateStream = await initIsolate();
	mainToIsolateStream.send('This is from main()');
	}

lmzach09 / isolate-example.dart

Created August 6, 2019 02:13

Dart/Flutter Isolate example that has two-way message passing ability.

	// Example of bi-directional communication between a main thread and isolate.

	import 'dart:io'; // for exit();
	import 'dart:async';
	import 'dart:isolate';

	Future<SendPort> initIsolate() async {
	Completer completer = new Completer<SendPort>();
	ReceivePort isolateToMainStream = ReceivePort();