ioleo ioleo

Add certificate to JDK trusted certificates store

The default JDK store is in:

<JDK>\lib\security\cacerts

Add a certificate with keytool:

<JDK>\bin\keytool.exe -importcert -file my-cert.cer -alias 'My cert' -keystore <JDK>\lib\security\cacerts -storepass "changeit"

Spark-a-thon - Development Activities

Tuesday, September 12, 2017

Sparkathon - Developing Spark Structured Streaming Apps in Scala

Spark SQL

Multiple groupBy or groupByKey aggregations in a batch structured query

Advanced Functional Programming with Scala - Notes

1. Mastering Functions

A function is a mapping from one set, called a domain, to another set, called the codomain. A function associates every element in the domain with exactly one element in the codomain. In Scala, both domain and codomain are types.

val square : Int => Int = x => x * x

	package ca.venasse.hooks

	import org.scalajs.dom.html
	import slinky.core.facade.ReactRef

	import scala.scalajs.js
	import scala.scalajs.js.JSConverters._
	import scala.scalajs.js.annotation.JSImport
	import scala.scalajs.js.\|

	#!/bin/sh
	# Inspired by https://gist.github.com/daktak/f887352d564b54f9e529404cc0eb60d5
	# Inspired by https://gist.github.com/jpouellet/d8cd0eb8589a5b9bf0c53a28fc530369

	ip() { qvm-prefs -g -- "$1" ip; }
	netvm() { qvm-prefs -g -- "$1" netvm; }

	forward() {
	local from_domain=$1
	local to_domain=$2

	object OneWayImplicits extends App {

	//outside implicits visible, but T is not visible inside
	case class Outwards[T](value: T) extends AnyVal

	//outside implicits invisible, T is visible inside
	case class Inwards[T](value: T) extends AnyVal

	implicit def outwardsFromT[T](implicit t: T): Outwards[T] = Outwards(t)
	implicit def tFromInwards[T](implicit inw: Inwards[T]): T = inw.value