Anh Le (Andy) anhldbk

## install.sh
sudo apt-get install netcat openssl libpcre3 dnsmasq procps perl

# for ubuntu 16.04 (xenial)

sudo apt-get -y install postgresql postgresql-contrib phppgadmin
sudo -i -u postgres

psql
CREATE USER kong; CREATE DATABASE kong OWNER kong;
ALTER USER kong WITH password 'kong';

## TxHandler.java
// https://www.coursera.org/learn/cryptocurrency/programming/KOo3V/scrooge-coin
import java.security.PublicKey;
import java.util.ArrayList;
import java.util.HashSet;
import java.util.Set;
import java.util.concurrent.ConcurrentHashMap;


public class TxHandler {
    private UTXOPool pool;

## zalopay-threadsafe.md

      
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                anhldbk
                / zalopay-threadsafe.md
            
            
              Last active
              November 7, 2019 02:44
            
              
                ZaloPay Challenges on Java Programming
              
          
    1. Overview


This is an entry test for our ZaloPay candidates
He/she must write solutions in English to answer following problems
Code must be written in Java

2. Problems

2.1 Thread safety


## passwd-generator.py
# Write a password generator that meets these four criteria:
# 1- The password length is always 4
# 2- The password should consist letters and numbers from {A-F}, {a-f} and {1-6} and pick at least one from each of these(randomly)
# 3- No duplicate passwords generated
# 4- The password is generated totally randomly

array = list('ABCDEFabcdef123456')
count = 0

def print_passwd(passwd):

## event-tree.js
'use strict'

const _ = require('lodash'),
    path = require('path')

/**
 * Class for matching MQTT-like topics
 */
class EventTree {
    constructor() {

## pom.xml
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>vn.zalopay.algo</groupId>
    <artifactId>cache</artifactId>
    <version>0.1.0</version>

## flexbox.html
<html>

<head>
    <style>
        #bar {
            background-color: #eee;
            height: 600px;
            width: 300px;
            display: flex;
            flex-direction: column;

## transport.cpp
/**
 * Generic interface for a method of transporting data. A TTransport may be
 * capable of either reading or writing, but not necessarily both.
 *
 */
class TTransport {

      /**
   * Attempt to read up to the specified number of bytes into the string.
   *

## hook.js
import React, { PropTypes } from "react";
import { Scrollbars } from "react-custom-scrollbars";
import ResponsiveComponent from "../responsive";

export default class Card extends ResponsiveComponent {
  render() {
    const {
      header,
      children,
      raised,

## easy_templating.cpp
#define Data_T(type) template <typename  T> type Data<T>

template<typename T>
class Data {

private:
    T _data;

public:
    Data(T data);
	sudo apt-get install netcat openssl libpcre3 dnsmasq procps perl

	# for ubuntu 16.04 (xenial)

	sudo apt-get -y install postgresql postgresql-contrib phppgadmin
	sudo -i -u postgres

	psql
	CREATE USER kong; CREATE DATABASE kong OWNER kong;
	ALTER USER kong WITH password 'kong';
	// https://www.coursera.org/learn/cryptocurrency/programming/KOo3V/scrooge-coin
	import java.security.PublicKey;
	import java.util.ArrayList;
	import java.util.HashSet;
	import java.util.Set;
	import java.util.concurrent.ConcurrentHashMap;


	public class TxHandler {
	private UTXOPool pool;
	# Write a password generator that meets these four criteria:
	# 1- The password length is always 4
	# 2- The password should consist letters and numbers from {A-F}, {a-f} and {1-6} and pick at least one from each of these(randomly)
	# 3- No duplicate passwords generated
	# 4- The password is generated totally randomly

	array = list('ABCDEFabcdef123456')
	count = 0

	def print_passwd(passwd):
	'use strict'

	const _ = require('lodash'),
	path = require('path')

	/**
	* Class for matching MQTT-like topics
	*/
	class EventTree {
	constructor() {
	<?xml version="1.0" encoding="UTF-8"?>
	<project xmlns="http://maven.apache.org/POM/4.0.0"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
	<modelVersion>4.0.0</modelVersion>

	<groupId>vn.zalopay.algo</groupId>
	<artifactId>cache</artifactId>
	<version>0.1.0</version>
	<html>

	<head>
	<style>
	#bar {
	background-color: #eee;
	height: 600px;
	width: 300px;
	display: flex;
	flex-direction: column;
	/**
	* Generic interface for a method of transporting data. A TTransport may be
	* capable of either reading or writing, but not necessarily both.
	*
	*/
	class TTransport {

	/**
	* Attempt to read up to the specified number of bytes into the string.
	*
	import React, { PropTypes } from "react";
	import { Scrollbars } from "react-custom-scrollbars";
	import ResponsiveComponent from "../responsive";

	export default class Card extends ResponsiveComponent {
	render() {
	const {
	header,
	children,
	raised,
	#define Data_T(type) template <typename T> type Data<T>

	template<typename T>
	class Data {

	private:
	T _data;

	public:
	Data(T data);