kharandziuk

const H = require('highland')
const Promise = require('bluebird')
const _ = require('lodash')

const Writable = require('stream').Writable;
const SIZE = 10

function grabFromApi(i) {
  console.log('start reading', i)
  return Promise.delay(1000).then(() => {

kharandziuk

PG_USER=booking PG_PASSWORD=booking psql -h localhost -p 15432 booking -c 'SELECT COUNT(*) FROM Hotels;'

kharandziuk

var pg = require('pg');

var client = new pg.Client();

// connect to our database
client.connect(function (err) {
  if (err) throw err;

  // execute a query on our database
  client.query('SELECT COUNT(*) FROM Hotels;', function (err, result) {

kharandziuk

Consider you are developing a math library which has a function isPi.

function isPi(x) {
  return x === 3.14
}

Now you are saying something like - We don't want to care where do we take the data(db, network, etc). So, we will receive a promise

kharandziuk

const request = require('superagent');
const _ = require('lodash');
const H = require('highland');
const Promise = require('bluebird');
function getLocations() {
    const call = request
        .get('http://viatorapi.viator.com/service/taxonomy/locations')
        .query({apiKey: API_KEY})
    return Promise.resolve(call)
        .then((res) => res.body.data)

kharandziuk

# -*- mode: yaml-*-
# vi: set ft=yaml sw=2 ts=2 :

- name: Configure scala study machine
  hosts: all
  sudo: True
  vars:
    pg_version: 9.4
    pg_conf: "/etc/postgresql/{{ pg_version }}/main/postgresql.conf"
    pg_hba: "/etc/postgresql/{{ pg_version }}/main/pg_hba.conf"

kharandziuk

# now you don't need to use curl
  tasks:
    - apt_key:
        url: "https://deb.nodesource.com/gpgkey/nodesource.gpg.key"
        
# change trusty for your distributive name
    - apt_repository: repo="deb https://deb.nodesource.com/node_5.x trusty main" state=present

kharandziuk

class N
  constructor: (val, next) ->
    @val = val
    @next = next


assert = require('assert')
reverse = (node, prev) =>
  if not node?
    assert(prev?)

kharandziuk

.phony: check


check1:
	curl -v http://develop.cricketduel.inprogress.rocks/

check2:
	curl -i http://develop.cricketduel.inprogress.rocks/

t:

kharandziuk

def rotations(num):
    str_num = str(num)
    result = set()
    for mid in xrange(len(str_num)):
        result.add(
            str_num[mid:] + str_num[:mid]
        )
    return result