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var request = require('request');
var cheerio = require('cheerio');
var co = require('co');

function parse(url) {
    // Make promise from calback
    return new Promise((resolve, reject) => {
        request({url}, function(error, response, body) {
            if(error) return reject(error);

7flash

var co = require('co');

function getResult(item) {
    return new Promise((resolve, reject) => {
        setTimeout(() => {
            if(item > 5) {
                reject('Break! Last page reached.');
            } else {
                resolve(item * 2);
            }

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var co = require('co');

let items = [1,2,3];

function* getResult(item) {
    return new Promise((resolve, reject) => {
        setTimeout(() => resolve(item * 2), 100);
    });
}

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var co = require('co');

function getResult(item) {
    return new Promise((resolve, reject) => {
       setTimeout(() => {
           resolve(item * 2);
       }, 100);
    });
}

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function* sequence() {
    let i = 0;
    while(++i) {
        yield i;
    }
}

for(let item of sequence()) {
    console.log(item);
}

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Nodej in deep

This article is for those who have basic knowledge of javascript

Javascript aside

Javascript thinks you should know to make sure you understand nodejs properly

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<?php
$file = file_get_contents('aes.txt');
$data = json_decode($file);
$orig = $data->data;
$key = pack('H*', "3dbb8dd8a8b153e9f1aaab6d657e01c2");
$result = mcrypt_decrypt(MCRYPT_RIJNDAEL_128, '3dbb8dd8a8b153e9f1aaab6d657e01c2', $orig, MCRYPT_MODE_CBC, base64_decode($data->iv));
echo $result;

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var crypto = require('crypto');
var secret = crypto.randomBytes(24);

function encrypt(plaintext) {
    var cipher = crypto.createCipher('aes-128-cbc', secret);
    cipher.setAutoPadding(false);
    var ciphertext = '';
    for (var i=0; i < plaintext.length; i+=16) {
        ciphertext += cipher.update(plaintext.substr(i, i+16), 'utf8', 'base64');
    }