yarax

var row = "word".split("");

// splice modifies original array
function pull (row, i) {
    var arr = [];
    row.forEach(function (item, j) {
        if (i!=j) arr.push(item);
    });
    return arr;
}

yarax

var Bacon = require('baconjs');
var Rx = require('rx');
var Kefir = require('kefir');
var EE = require('events').EventEmitter;
var ee = new EE;

var sum = function (prev, cur) {return prev+cur};

Bacon.fromEvent(ee, 'event1').scan(0, sum).onValue(console.log); // 0, 4, 9
Rx.Observable.fromEvent(ee, 'event1').reduce(sum, 0).subscribe(console.log); // doesn't work

yarax

let x = 1;

let sum = (a, b) => a + b + x

sum(1, 2); // 4

x = 2;

sum(1, 2); // 5

yarax

const http = require('http');

// Swagger-like API description
const api = {
  '/users': {
    'get': {
      'parameters': {
        'role': {
          'in': 'query'
        },

yarax

var schemaLoaded = kefir.fromEvents(app, 'server:schema').take(1);

var serverListening = kefir.fromEvents(app, 'server:running').take(1);

return kefir.merge([schemaLoaded, serverListening]).toPromise();

yarax

/**
 * @param val {*}
 * @returns {Boolean}
 */
function isNothing(val) {
  return val === undefined || val === null;
}
/**
 * @param val {*}
 * @return {Number}

yarax

app.post((req, res) => {
  const user = db.getUserByName(req.headers.name);
  const user = db.getUserByName(req.query.name);
  const user = db.getUserByName(req.path.name);
  const user = db.getUserByName(req.body.name);
});

yarax

factorial 0 = 1 
factorial n = n * factorial (n — 1)

yarax

class ZeroValue extends Error {}
class OtherValue extends Error {}

function resolveValue(val) {
  return Promise.resolve().then(() => {
    if (!val) throw new ZeroValue();
    throw new OtherValue(val);
  });
}

yarax

#!/usr/bin/env bash

TAG="kafka-brokers-demo"

sudo yum install -y jq
sudo yum install -y wget
sudo yum install -y java
cd ~
wget "http://archive.apache.org/dist/kafka/2.1.0/kafka_2.11-2.1.0.tgz"
tar -xvf kafka_2.11-2.1.0.tgz