Aleksey-Danchin

!(function () {
	class Lever {
		constructor(data) {
			const lever = this;

			lever.canvas = document.getElementById(data.canvasId);
			lever.context = lever.canvas.getContext('2d');

			lever.canvas.width = data.width;
			lever.canvas.height = data.height;

Aleksey-Danchin

const svg = d3.select("body").append('svg')
	.attr('width', 500)
	.attr('height', 500);

const data = [
	{cx: 10, cy: 10},
	{cx: 490, cy: 50},
	{cx: 50, cy: 490}
];

Aleksey-Danchin

Aleksey-Danchin

class Point {
	constructor () {
		const point = this;
		
		point.x = 0;
		point.y = 0;
		point.color = 'red';
	}
	
	moveTo (x, y) {

Aleksey-Danchin

function showPerson1 (name, family, age) {
	console.log(name, family, age);
}

function showPerson2 ({name, family, age}) {
	showPerson1(name, family, age);
}

const name = 'Aleksey', family = 'Danchin', age = 24;

Aleksey-Danchin

Array.isEqual = function (...arrays) {
	if (arrays.length == 0) return false;
	if (arrays.length == 1) return true;

	const ctrl = arrays[0]
		, length = ctrl.length;

	for (let i = 1; i < arrays.length; i++) {
		const array = arrays[i];

Aleksey-Danchin

Object.defineProperty(Map.prototype, 'toJSON', {
	  enumerable: false
	, configurable: true
	, get: () => function () {
		const obj = {};
	
		for (const key of this.keys())
			obj[key] = this.get(key);
		
		return obj;

Aleksey-Danchin

class User {
	constructor (isAdmin = false) {
		const user = this;
		
		user.isAdmin = isAdmin;
		User.all.push(user);
	}
	static get admins () {
		return User.all.filter(user => user.isAdmin);
	}

Aleksey-Danchin

const n = 1000;

const buff = new Int16Array(n + 1);
for (let i = 3; i < buff.length; i += 2) {
	buff[i - 1] = 1;
	
	if (buff[i] == 0)
		for (let j = i + i; j < buff.length; j += i)
			buff[j] = 1;
}

Aleksey-Danchin

Object.defineProperty(Array.prototype, 'first', {
	  enumerable: false
	, configurable: true
	, get: function () { return this[0]; }
	, set: function (value) {
		return this.length ? this[0] = value : this.push(value) && value;
	}
});

Object.defineProperty(Array.prototype, 'last', {