Alexzanderk

{
    // Use IntelliSense to learn about possible attributes.
    // Hover to view descriptions of existing attributes.
    // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
    "version": "0.2.0",
    "configurations": [
        {
            "type": "node",
            "request": "launch",
            "name": "Launch Program",

Alexzanderk

// Nodejs encryption with GCM
// Does not work with nodejs v0.10.31
// Part of https://github.com/chris-rock/node-crypto-examples

var crypto = require('crypto'),
  algorithm = 'aes-256-gcm',
  password = '3zTvzr3p67VC61jmV54rIYu1545x4TlY',
  // do not use a global iv for production, 
  // generate a new one for each encryption
  iv = '60iP0h6vJoEa'

Alexzanderk

import cluster from "cluster";
import { cpus } from "os";

const NUM_WORKERS = cpus().length;
const PATH_TO_SERVER_APP = __dirname + '/app.ts';

cluster.setupMaster({
    execArgv: ['-r', 'tsconfig-paths/register', '-r', 'ts-node/register'],
    exec: PATH_TO_SERVER_APP
} as cluster.ClusterSettings)

Alexzanderk

app.get('/video', function(req, res) {
  const path = 'assets/sample.mp4'
  const stat = fs.statSync(path)
  const fileSize = stat.size
  const range = req.headers.range
  if (range) {
    const parts = range.replace(/bytes=/, "").split("-")
    const start = parseInt(parts[0], 10)
    const end = parts[1] 
      ? parseInt(parts[1], 10)

Alexzanderk

{
    "version": "0.2.0",
    "configurations": [
        {
            "name": "Run ts-mocha File",
            "type": "node",
            "request": "launch",
            "runtimeExecutable": "${workspaceRoot}/node_modules/.bin/ts-mocha",
            "runtimeArgs": [
                "${file}"

Alexzanderk

const useFocus = (count: number) => {
    const refsArr: Array<React.RefObject<HTMLInputElement>> = [];

    for (let index = 0; index < count; index++) {
        const htmlElRef: React.RefObject<HTMLInputElement> = useRef(null);
        refsArr[index] = htmlElRef;
    }

    const setFocus = (index: number): void => {
        refsArr[index].current && refsArr[index].current.focus();

Alexzanderk

openssl req -new -x509 -nodes -newkey rsa:1024 -keyout server.key -out server.crt

Alexzanderk

type Constructor<T> = new (...args: any[]) => T;
type ModelType<T extends Model<T>> = Constructor<T> & typeof Model;


export interface IRepository<T extends Model> {
    get(id: string): Promise<T| null>;
    find(where: FindOptions<T>): Promise<T>;
    create(model: T): Promise<T>;
    update(key: any, model: T): Promise<T>;
}

Alexzanderk

{
    // Use IntelliSense to learn about possible attributes.
    // Hover to view descriptions of existing attributes.
    // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
    "version": "0.2.0",
    "configurations": [
        {
            "type": "node",
            "request": "launch",
            "name": "Launch Program",

Alexzanderk

var nextChar = c=>c?String.fromCharCode(c.charCodeAt(0)+1):'A';
var nextCol = s=>s.replace(/([^Z]?)(Z*)$/, (_,a,z)=>nextChar(a) + z.replace(/Z/g,'A'));

//test:

nextCol(''); //A
nextCol('A'); //B
nextCol('Z'); //AA
nextCol('AA'); //AB
nextCol('XYZ'); //XZA