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Pablo Francisco Pérez Hidalgo pfcoperez

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@pfcoperez
pfcoperez / MonoidSillyExample.scala
Created June 17, 2017 15:48
import cats.Monoid
import cats.syntax.monoid._
case class Order(products: List[String], topay: Double)
//This could be done with higher abstraction cats tools
implicit val orderMonoidInstance: Monoid[Order] = new Monoid[Order] {
def empty: Order = Order(Nil, 0.0)
def combine(x: Order, y: Order): Order = Order(x.products ++ y.products, x.topay + y.topay)
}
@pfcoperez
pfcoperez / checkLambdaWorldTickets.sh
Created July 7, 2017 11:29
#!/bin/bash
curl https://www.eventbrite.es/e/lambda-world-2017-tickets-35032894330\#tickets \
| awk -F "collection : " '{print $2}' \
| python -m json.tool \
| grep number_of_tickets_remaining
@pfcoperez
pfcoperez / undirectedGraphTrivialUse.scala
Created August 11, 2017 08:54
import org.pfcoperez.dailyalgorithm.datastructures.graphs.undirected._
val ug = UndirectedGraph(Set(1,2,3,4), Edge(1,2)::Edge(2,3)::Edge(3,4)::Edge(4,1)::Nil)
ug.adjacentTo(1)
ug.adjacentTo(2)
ug.adjacentTo(3)
ug.adjacentTo(4)
(ug - Edge(1,4)).adjacentTo(1)
(ug - Edge(1,4)).adjacentTo(4)
@pfcoperez
pfcoperez / permutations.scala
Created August 14, 2017 13:10
@tailrec
def permutations[T](alphabet: Set[T], s: Seq[Seq[T]] = Seq(Seq.empty[T])): Seq[Seq[T]] =
if(s.head.size == alphabet.size) s else {
val updatedSolutions = for {
partial <- s
chosen <- (alphabet -- partial)
} yield chosen +: partial
permutations(alphabet, updatedSolutions)
}
@pfcoperez
pfcoperez / concurrent_pf_launcher.sh
Last active August 16, 2017 08:56
#!/bin/bash
function launchIteration {
CMD=$1
STOP_OUTPUT_PATTERN=$2
OUTPUT_DIR=$3
REMAINING_ITERATIONS=$4
if [[ $REMAINING_ITERATIONS == "0" ]]; then
echo "Completed launch chain"
@pfcoperez
pfcoperez / RobotCommands.scala
Created February 6, 2017 19:31
Parsers combinators example: Robot commands
import scala.util.parsing.combinator._
object RobotCommands extends App {
object Entities {
trait MovementDirection
case object Up extends MovementDirection
case object Down extends MovementDirection
case object Left extends MovementDirection
@pfcoperez
pfcoperez / checkLambdaWorldTickets_improved.sh
Created August 22, 2017 07:51
curl https://www.eventbrite.es/e/lambda-world-2017-tickets-35032894330\#tickets \
| awk -F "collection : " '{print $2}' \
| jq '.[] | {ticket_type: .ticket_name, price: .cost.display, remaining: .number_of_tickets_remaining}'
@pfcoperez
pfcoperez / distributedPrimes.scala
Created November 9, 2017 15:59
val upperBound = 100
val candidates = sc.range(1, upperBound)
val factors = sc.range(1, math.sqrt(upperBound).toLong+1)
val primes = {
candidates.cartesian(factors) filter {
case (candidate, factor) => candidate % factor == 0L
}
}.aggregateByKey(0L)((counter, _) => counter+1L, _ + _).filter(_._2 <= 2L).keys
@pfcoperez
pfcoperez / conway.html
Created November 28, 2017 13:26
<!DOCTYPE html>
<html>
<head>
<script type="text/javascript">
/*! jQuery v2.0.0 | (c) 2005, 2013 jQuery Foundation, Inc. | jquery.org/license
//@ sourceMappingURL=jquery.min.map
*/
(function(e,undefined){var t,n,r=typeof undefined,i=e.location,o=e.document,s=o.documentElement,a=e.jQuery,u=e.$,l={},c=[],f="2.0.0",p=c.concat,h=c.push,d=c.slice,g=c.indexOf,m=l.toString,y=l.hasOwnProperty,v=f.trim,x=function(e,n){return new x.fn.init(e,n,t)},b=/[+-]?(?:\d*\.|)\d+(?:[eE][+-]?\d+|)/.source,w=/\S+/g,T=/^(?:(<[\w\W]+>)[^>]*|#([\w-]*))$/,C=/^<(\w+)\s*\/?>(?:<\/\1>|)$/,k=/^-ms-/,N=/-([\da-z])/gi,E=function(e,t){return t.toUpperCase()},S=function(){o.removeEventListener("DOMContentLoaded",S,!1),e.removeEventListener("load",S,!1),x.ready()};x.fn=x.prototype={jquery:f,constructor:x,init:function(e,t,n){var r,i;if(!e)return this;if("string"==typeof e){if(r="<"===e.charAt(0)&&">"===e.charAt(e.length-1)&&e.length>=3?[null,e,null]:T.exec(e),!r||!r[1]&&t)return!t||t.jquery?(t||n).find(e):this.constructor(t).find(e);if(r[1]){i
@pfcoperez
pfcoperez / Caesar.scala
Last active December 31, 2017 09:09
object Caesar extends App {
private lazy val pos2symbol: Vector[Char] = (('A' to 'Z') ++ ('a' to 'z') :+ ' ' ).toVector
private lazy val symbol2pos: Map[Char, Int] = pos2symbol.zipWithIndex.toMap
def encode(msg: String)(implicit key: Int): String =
msg collect { case c if symbol2pos contains c =>
pos2symbol((symbol2pos(c) + key) % symbol2pos.size)
}