alecat88’s gists

alecat88 / logical_or_assignment_operator.js

Created March 2, 2022 00:05

ES12

	// In the example, the \|\|= will check if the songsCount is false (0).
	// If false, then the right value will be assigned to the left variable.
	let myPlaylist = {songsCount: 0, songs:[]};
	myPlaylist.songsCount \|\|= 100;
	console.log(myPlaylist); // This will print: {songsCount: 100, songs: Array(0)}

alecat88 / promise_any.js

Created March 2, 2022 00:04

ES12

	// Create a Promise.
	const promise1 = new Promise((resolve, reject) => {
	// After 2 seconds resolve the first promise.
	setTimeout(() => resolve("The first promise has been resolved."), 2000);
	});

	// Create a Promise.
	const promise2 = new Promise((resolve, reject) => {
	// After 1 second resolve the second promise.
	setTimeout(() => resolve("The second promise has been resolved."), 1000);

alecat88 / private_class_methods.js

Created March 2, 2022 00:04

ES12

	// Let's create a class named User.
	class User {
	constructor() {}

	// The private methods can be created by prepending '#' before
	// the method name.
	#generateAPIKey() {
	return "d8cf946093107898cb64963ab34be6b7e22662179a8ea48ca5603f8216748767";
	}

alecat88 / private_accessors.js

Created March 2, 2022 00:03

ES12

	// Let's create a class named Str.
	class Str {
	// The private attributes can be created by prepending '#'
	// before the attribute name.
	#uniqueStr;

	constructor() {}

	// A private Setters can be created by prepending '#' before
	// the Setter name.

alecat88 / nullish_coalescing_assignment_operator.js

Created March 2, 2022 00:03

ES12

	// In the example, the ??= will check if the lastname is null or undefined.
	// If null or undefined, then the right value will be assigned to the left variable.
	let userDetails = {firstname: 'Katina', age: 24}
	userDetails.lastname ??= 'Dawson';
	console.log(userDetails); // This will print: {firstname: 'Katina', age: 24, lastname: 'Dawson'}

alecat88 / logical_and_assignment_operator.js

Created March 2, 2022 00:02

ES12

	// In the example, the &&= will check if the filesCount is true.
	// If true, then the right value will be assigned to the left variable.
	let myFiles = {filesCount: 100, files:[]};
	myFiles.filesCount &&= 5;
	console.log(myFiles); // This will print: {filesCount: 5, files: Array(0)}

alecat88 / handle_promise_any_aggregrate_error.js

Created March 2, 2022 00:02

ES12

	// Create a Promise.
	const promise1 = new Promise((resolve, reject) => {
	// After 1 second reject the first promise.
	setTimeout(() => reject("The first promise has been rejected."), 1000);
	});

	// Create a Promise.
	const promise2 = new Promise((resolve, reject) => {
	// After 500 miliseconds reject the second promise.
	setTimeout(() => reject("The second promise has been rejected."), 500);

alecat88 / numeric_separtors.js

Created March 2, 2022 00:01

	// Decimal integer literal with digits grouped by thousand.
	let n1 = 1_000_000_000;
	console.log(n1); // This will print: 1000000000

	// Decimal literal with digits grouped by thousand.
	let n2 = 1_000_000_000.150_200
	console.log(n2); // This will print: 1000000000.1502

	// Hexadecimal integer literal with digits grouped by byte.
	let n3 = 0x95_65_98_FA_A9

alecat88 / replace_all.js

Created March 1, 2022 23:57

Medium

	// Declare a variable and store some value.
	const orgStr = 'JavaScript, often abbreviated as JS, is a programming language that conforms to the ECMAScript specification. JavaScript is high-level, often just-in-time compiled and multi-paradigm.';

	// To replace single instance, use replace().
	let newStr = orgStr.replace('JavaScript', 'TypeScript');
	console.log(newStr);

	// To replace all instances, use replaceAll().
	let newStr2 = orgStr.replaceAll('JavaScript', 'TypeScript');
	console.log(newStr2);