Hieu Nguyen kerituni12

Reverse Engineering Webpack Apps

Some notes and techniques for reverse engineering Webpack (and a little bit about React/Vue/Angular) apps.

ForRoot

This is useful when the registerAs is required across, so it is best to use it in the AppModule

import databaseConfig from './config/database.config';
@Module({
  imports: [
    ConfigModule.forRoot({
      load: [databaseConfig],
 }),

Why using the `children` prop makes `React.memo()` not work

I've recently ran into a pitfall of [React.memo()][memo] that seems generally overlooked; skimming over the top results in Google just finds it mentioned in passing in a [React issue][regit], but not in the [FAQ] or API [overview][react-api], and not in the articles that set out to explain React.memo() (at least the ones I looked at). The issue is specifically that nesting children defeats memoization, unless the children are just plain text. To give a simplified code example:

const Memoized = React.memo(({ children }) => (<div>{children}</div>));
// Won't ever re-render
<Memoized>bar</Memoized>
// Will re-render every time; the memoization does nothing

Steps:

Download the latest zsh package: https://packages.msys2.org/package/zsh?repo=msys&variant=x86_64

Example:

zsh-5.7.1-1-x86_64.pkg.tar.xz

Depth in Event Loop

For those JavaScript programmers, event loop is an important concept, inevitably.

Literally, event loop is what JavaScritp uses to implement non-blocking execution. Understanding how the event loops works internally would benefit you a lot when programming in JavaScript.

There are two major environments JavaScript runs in: browser and Node.js.

Browser

FYI: Created blog post with more details

How to fix ".gitignore not working" issue?

Sometimes git does not exclude files/folders added .gitignore especially if you had commited them before. Here is how to fix it. I am ignoring node_modules from Angular project as an example

Update .gitignore with the folder/file name you want to ignore. You can use anyone of the formats mentioned below (prefer format1)

### Format1  ###
node_modules/

First of all, please note that token expiration and revoking are two different things.

Expiration only happens for web apps, not for native mobile apps, because native apps never expire.
Revoking only happens when (1) uses click the logout button on the website or native Apps;(2) users reset their passwords; (3) users revoke their tokens explicitly in the administration panel.

1. How to hadle JWT expiration

A JWT token that never expires is dangerous if the token is stolen then someone can always access the user's data.

Quoted from JWT RFC:

	import * as Dockerode from "dockerode";
	import * as stream from "stream";
	import {ContainerCreateOptions, HostConfig} from "dockerode";

	export async function dockerRunWithStdIn(
	docker: Dockerode,
	stdin: NodeJS.ReadableStream \| Buffer,
	options: {name: string} & ContainerCreateOptions
	): Promise<Buffer> {
	return await new Promise<Buffer>(async (resolve, reject) => {

	public class Solution {
	public int[] quickSort(int[] array) {
	//corner cases
	if(array == null) return array;

	quickSort2(array, 0, array.length-1);
	return array;
	}

	//quicksort recursive method

	**********************
	* Pre-requisites *
	**********************
	1. Set up Windows 2016 password:
	gcloud beta compute --project <project_id> reset-windows-password <instance_name> --zone <zone_name>
	ip_address: <ip_address>
	password: <defult_password_generated>
	username: <username>

	3. Installing Docker: