Calvin M cloudcalvin

Rust/Haskell: Higher-Kinded Types (HKT)

A higher kinded type is a concept that reifies a type constructor as an actual type.

A type constructor can be thought of in these analogies:

like a function in the type universe
as a type with a "hole" in it

#Create bitbucket branch

##Create local branch

$ git checkout -b sync
Switched to a new branch 'sync'
$ git branch
  master
* sync

From time to time, Musk will send out an e-mail to the entire company to enforce a new policy or let them know about something that's bothering him. One of the more famous e-mails arrived in May 2010 with the subject line: Acronyms Seriously Suck:

There is a creeping tendency to use made up acronyms at SpaceX. Excessive use of made up acronyms is a significant impediment to communication and keeping communication good as we grow is incredibly important. Individually, a few acronyms here and there may not seem so bad, but if a thousand people are making these up, over time the result will be a huge glossary that we have to issue to new employees. No one can actually remember all these acronyms and people don't want to seem dumb in a meeting, so they just sit there in ignorance. This is particularly tough on new employees.

That needs to stop immediately or I will take drastic action - I have given enough warning over the years. Unless an acronym is approved by me, it should not enter the SpaceX glossary.

	import com.datastax.spark.connector.cql.CassandraConnector
	import org.apache.spark.{SparkContext, SparkConf}
	import org.apache.spark.sql.{Row, SQLContext}

	/** Spark SQL: Txt, Parquet, JSON Support with the Spark Cassandra Connector */
	object SampleJson extends App {
	import com.datastax.spark.connector._
	import GitHubEvents._

	val conf = new SparkConf(true)

	//fiels are the array of data values
	//column map is the headers
	val columnMap = Headers.column_name.zipWithIndex
	val jsonMapping = (ListMap[String, Any]()/: columnMap) { (a, f) =>
	a + ( "\"" + f._1 + "\"" -> fields(f._2))
	fields.foreach(_ match => {case empty : null})

	assemblyMergeStrategy in assembly := {
	case PathList("javax", "servlet", xs @ _*) => MergeStrategy.last
	case PathList("javax", "activation", xs @ _*) => MergeStrategy.last
	case PathList("org", "apache", xs @ _*) => MergeStrategy.last
	case PathList("com", "google", xs @ _*) => MergeStrategy.last
	case PathList("com", "esotericsoftware", xs @ _*) => MergeStrategy.last
	case PathList("com", "codahale", xs @ _*) => MergeStrategy.last
	case PathList("com", "yammer", xs @ _*) => MergeStrategy.last
	case "about.html" => MergeStrategy.rename
	case "META-INF/ECLIPSEF.RSA" => MergeStrategy.last

	//
	// sourced from "http://jamesgregson.blogspot.com/2012/05/example-code-for-building.html"
	//
	#include<fstream>
	#include<vector>
	#include<string>
	#include<algorithm>

	#include<CGAL/Simple_cartesian.h>
	#include<CGAL/Polyhedron_incremental_builder_3.h>

	# Save this file to ~/.multirust/Makefile
	# to run, cd ~/.multirust; make toolchains/1.3.0/src
	.PHONY: clean

	rust.git:
	git clone https://github.com/rust-lang/rust.git --bare

	toolchains/nightly/src: toolchains/master/src
	ln -sf $$(pwd)/toolchains/master/src $$(pwd)/$@

	set -g history-limit 5000
	set-window-option -g utf8 on # utf8 support

	# Open man page in new window
	bind / command-prompt "split-window 'exec man %%'"
	bind y run-shell "tmux show-buffer \| xclip -sel clip -i" \; display-message "Copied tmux buffer to system clipboard"
	set -g update-environment -r

	# quick view of processes
	bind '~' split-window "exec htop"

	#!/bin/sh
	timezone="Europe/Zurich"
	# List of valid timezones: wikipedia.org/wiki/List_of_tz_database_time_zones
	script="${0##*/}"
	rootdir=$(cd `dirname "${BASH_SOURCE[0]}"` && pwd)
	logfile="$script.log"
	log="$rootdir/$logfile"
	now=$(TZ=":$timezone" date)
	# Uncomment 'mailto=' (remove #) to enable emailing the log upon completion
	#mailto="[email protected]"