Krishna Vangapandu krishnabhargav

Seasoned Engineering Leader at Startups, Scale-ups and Growth companies. Passionate about all aspects of building great systems!

krishnabhargav / trip.clj

Last active August 29, 2015 14:06

some clojure code to get some experts review it ..

	(ns trip.core
	(:require [[clj-time.core :as t]
	[clojure.set :as set]]))

	(defn default-trip
	"returns a default trip with current date as start date & end date as 5 days from now"
	[]
	{ :name "New Trip"
	:description "Enter your trip description here"
	:start-date (t/today)

krishnabhargav / project.clj

Last active August 29, 2015 14:06

web development blog's project.clj

	(defproject webapp "0.1.0-SNAPSHOT"
	:description "Web Application in Clojure"
	:url "http://localhost/groupie"
	:license {:name "Eclipse Public License"
	:url "http://www.eclipse.org/legal/epl-v10.html"}

	:dependencies [[org.clojure/clojure "1.6.0"]
	[ring "1.3.1"]
	[http-kit "2.1.16"]
	[compojure "1.1.9"]

krishnabhargav / server.clj

Last active August 29, 2015 14:06

clojure server

	(ns webapp.server
	(:require [ring.middleware.resource :refer [wrap-resource]]
	[ring.middleware.file-info :refer [wrap-file-info]]
	[ring.middleware.reload :refer [wrap-reload]]
	[compojure.core :refer :all]
	[compojure.route :as route]

	[org.httpkit.server :refer [run-server]]))

	(defroutes route-map

krishnabhargav / client.cljs

Last active August 29, 2015 14:06

simple hello alert message

	(ns webapp.client
	(:require
	[figwheel.client :as fw :include-macros true]))

	(fw/watch-and-reload)

	(js/alert "Hello Zumanji")

krishnabhargav / index.html

Created September 23, 2014 01:44

clojurescript included html file

	<html>
	<body>
	Welcome to clojure world!

	<script type="text/javascript" src="js/goog/base.js"></script>
	<script src="js/main.js" type="text/javascript"></script>

	<script text="text/javascript">
	goog.require("webapp.client");
	</script>

krishnabhargav / fib.scala

Created October 21, 2014 03:14

Functional Scala ... tail recursive computation of fib number

	//tail recursive fibonacci numbers
	def fib(n: Int) = {
	@scala.annotation.tailrec
	def fibImpl(a:Int, nxt: Int, res: Int) : Int =
	a match {
	case 0 => res
	case _ => fibImpl(a-1, nxt+res, nxt)
	}
	fibImpl(n, 1, 0);
	}

krishnabhargav / isSorted.scala

Created October 21, 2014 11:52

isSorted for arrays and seq

	def isSorted[A] (items : Seq[A], ordered : (A,A) => Boolean) : Boolean =
	(items, items.tail).zipped.forall(ordered)
	/*items match {
	case null => true
	case x :: Nil => true
	case x :: y :: xs => ordered (x, y) && isSorted (xs, ordered)
	}*/

	isSorted(Seq(1,2,3), (a: Int, b: Int) => a < b);

krishnabhargav / curry.scala

Last active August 29, 2015 14:08

implementing currying ... chapter 2 ... FP in Scala

	def curry[A,B,C] (f: (A,B) => C): A => (B => C) = a => b => f(a,b)

	curry((a:Int, b:Int) => a * b)(1)(2)

	def uncurry [A,B,C] (f: A => B => C) : (A,B) => C = (a,b) => f(a)(b)

	var f = uncurry (curry((a:Int, b: Int) => a * b)) // f (3,5) = 15

krishnabhargav / compose.scala

Created October 25, 2014 14:13

f compose g in Scala .. Chapter 2 FP In Scala

def compose[A,B,C] (f: B => C, g : A => B) : A => C = a => f(g(a))

krishnabhargav / WebsocketServer.scala

Created November 12, 2014 13:43

Websocket server inside a scala application

	import org.atmosphere.config.service.WebSocketHandlerService
	import org.atmosphere.nettosphere.{Config, Nettosphere}
	import org.atmosphere.websocket.{WebSocket, WebSocketHandlerAdapter}

	object Main {

	def main(args: Array[String]) {

	val builder = new Config.Builder().host("127.0.0.1").port(8080)