umidjons

Compressing file using the zlib module

'use strict';

var zlib = require('zlib');
var fs = require('fs');

var gzip = zlib.createGzip();

umidjons

Print out environment variables

'use strict';

var path = require('path');

var variables = process.env.PATH
    .split(path.delimiter)
 .sort();

umidjons

fs and path modules example

Read the current directory, determine object is file or not, extract files extension and basename, print them out.

'use strict';

var fs = require('fs');
var path = require('path');

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Determine file's/directory's permissions

Install stat-mode module:

npm i stat-mode -S

'use strict';

umidjons

Get information about OS and Hardware: OS module example

'use strict';

var os = require('os');

console.log('Using EOL' + os.EOL + 'to insert a new line');
console.log('Endianness:', os.endianness());
console.log('Temp Dir:', os.tmpdir());

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Find out IP of the domain: DNS module example

var dns = require('dns');

// get first found IP
dns.lookup('oreilly.com', (err, address, family) => {
    if (err) {
        return console.log(err);
    }

umidjons

Client/Server POST request example in pure Node.js

File server.js:

var http = require('http');
var querystring = require('querystring');

var server = http.createServer().listen(3000);

server.on('request', function (req, res) {

umidjons

Get input from stdin example

"use strict";

process.stdin.setEncoding('utf8');

process.stdin.on('readable', ()=> {
    let input = process.stdin.read();

umidjons

Extending EventEmitter example

"use strict";

var EventEmitter = require('events').EventEmitter;

class MyClass extends EventEmitter {
    /**
 * Create MyClass instance

umidjons

events.EventEmitter example

"use strict";

var EventEmitter = require('events').EventEmitter;
var ee = new EventEmitter();
var counter = 1;

setInterval(function () {