umidjons

Create ssh tunnel and connect to the remote mongo database on command line

Assume followings:

/mykeys/.ssh/prodserver.pem - is a certificate file

umid - is a user name

111.111.111.111 - is a remote host, that mongodb runs

umidjons

Using decorators. Transpile with Babel. Configure Gulp task.

Install necessary modules

npm i -D babel-cli babel-plugin-transform-decorators-legacy
npm i -D gulp gulp-sourcemaps gulp-babel

Configure npm run build and npm start commands. Also specify babel options, such as plugins.

umidjons

Get Free SSL Certificate & Configure Nginx to use it

• Register on GoGetSSL.
• Choose SSL Certificates -> Domain Validation SSL from top menu.
• On products table click Details button on row Comodo - Free SSL.
• On the opening page click Create New Order button.
• In the Product Configuration section choose: Product Type = SSL Certificates and Select Item = Comodo Trial SSL, then click Complete Order button.
• On the opening page click Incomplete Orders link.
• In the List of all your SSL certificates table click Generate button.
• With Online CSR Generator generate CSR.

umidjons

Socket.io Client (Manager) events example

npm i -S socket.io express jquery

File server.js:

var express = require('express');
var app = express();

umidjons

Асинхронное программирование

• операция, который результат доступен не сразу же, а через некоторое время
• а также называют event driven programming

Примеры асинхронных операций:

• обращение к диску за данными
• сетевые обращение (БД, веб-сервер, кеш сервер)

umidjons

Set JavaScript variable via Twig in OctoberCMS

record - is variable, that contains models (objects)

I passed JSON_PRETTY_PRINT, JSON_UNESCAPED_UNICODE and JSON_UNESCAPED_SLASHES constants into json_encode filter.

<script>
var infokioskList = JSON.parse("{{ records | json_encode(constant('JSON_PRETTY_PRINT') + constant('JSON_UNESCAPED_UNICODE') + constant('JSON_UNESCAPED_SLASHES')) | e('js') }}");

umidjons

Angular Google Maps directive example

Prepare assets

bower init
bower i -S angular lodash angular-simple-logger angular-google-maps

File index.html:

umidjons

Spawn child process example

'use strict';

var spawn = require('child_process').spawn,
    pwd = spawn('cmd', ['/c', 'dir']);

pwd.stdout.on('data', (data) => {
 console.log('stdout:', data.toString());

umidjons

UDP Client/Server example

File server.js:

'use strict';

var dgram = require('dgram');
var server = dgram.createSocket('udp4');

const PORT = 3000;

umidjons

Socket client/server example

File server.js:

'use strict';

var net = require('net');

const PORT = 3000;