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; sets as unordered lists:

; a set for now is defined as as being able 
; to undergo the following operations

; 1)  element-of-set? checks if x is in set
(define (element-of-set? x set)
  (cond ((null? set) false)
        ((equal? x (car set)) true)
        (else (element-of-set? x (cdr set)))))

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Mounting VirtualBox shared folders on Ubuntu Server 18.04 LTS (Bionic Beaver)

This guide will walk you through the steps on how to setup a VirtualBox shared folder inside your Ubuntu Server guest.

Prerequisites

This guide assumes that you are using the following setup:

• Oracle VM VirtualBox version 6.0.10 with Extension Pack installed
• Microsoft Windows 7 SP1 as the host OS
• A fresh install of Ubuntu Server 18.04.2 LTS as the guest OS

You could still make this guide work with other setups (possibly with some modifications to the commands and whatnot).

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Update 7/28/2019: An updated version of this guide for Ubuntu Server 18.04 LTS is now available. Feel free to check it out.

Mounting VirtualBox shared folders on Ubuntu Server 16.04 LTS

This guide will walk you through steps on how to setup a VirtualBox shared folder inside your Ubuntu Server guest. Tested on Ubuntu Server 16.04.3 LTS (Xenial Xerus)

Steps:

1. Open VirtualBox
2. Right-click your VM, then click Settings
3. Go to Shared Folders section

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(ns async
  (:import [goog.async Throttle Debouncer]))

(defn disposable->function [disposable listener interval]
  (let [disposable-instance (disposable. listener interval)]
    (fn [& args]
      (.apply (.-fire disposable-instance) disposable-instance (to-array args)))))

(defn throttle [listener interval]
  (disposable->function Throttle listener interval))

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• Haskell

import Data.List
 
haystack=["Zig","Zag","Wally","Ronald","Bush","Krusty","Charlie","Bush","Bozo"]
needles = ["Bush"]

map (\x -> (x, elemIndex x haystack)) needles

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car_ID,symboling,CarName,fueltype,aspiration,doornumber,carbody,drivewheel,enginelocation,wheelbase,carlength,carwidth,carheight,curbweight,enginetype,cylindernumber,enginesize,fuelsystem,boreratio,stroke,compressionratio,horsepower,peakrpm,citympg,highwaympg,price
1,3,alfa-romero giulia,gas,std,two,convertible,rwd,front,88.6,168.8,64.1,48.8,2548,dohc,four,130,mpfi,3.47,2.68,9,111,5000,21,27,13495
2,3,alfa-romero stelvio,gas,std,two,convertible,rwd,front,88.6,168.8,64.1,48.8,2548,dohc,four,130,mpfi,3.47,2.68,9,111,5000,21,27,16500
3,1,alfa-romero Quadrifoglio,gas,std,two,hatchback,rwd,front,94.5,171.2,65.5,52.4,2823,ohcv,six,152,mpfi,2.68,3.47,9,154,5000,19,26,16500
4,2,audi 100 ls,gas,std,four,sedan,fwd,front,99.8,176.6,66.2,54.3,2337,ohc,four,109,mpfi,3.19,3.4,10,102,5500,24,30,13950
5,2,audi 100ls,gas,std,four,sedan,4wd,front,99.4,176.6,66.4,54.3,2824,ohc,five,136,mpfi,3.19,3.4,8,115,5500,18,22,17450
6,2,audi fox,gas,std,two,sedan,fwd,front,99.8,177.3,66.3,53.1,2507,ohc,five,136,mpfi,3.19,3.4,8.5,110,5500,

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A curated list of AWS resources to prepare for the AWS Certifications

A curated list of awesome AWS resources you need to prepare for the all 5 AWS Certifications. This gist will include: open source repos, blogs & blogposts, ebooks, PDF, whitepapers, video courses, free lecture, slides, sample test and many other resources.

---

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 ___  ___ __ _| | _____      ____ _ _   _
/ __|/ __/ _` | |/ _ \ \ /\ / / _` | | | |
\__ \ (_| (_| | |  __/\ V  V / (_| | |_| |
|___/\___\__,_|_|\___| \_/\_/ \__,_|\__, |
                                    |___/

Welcome on Ubuntu Bionic Beaver (18.04 LTS) (GNU/Linux 4.4.127-mainline-rev1 aarch64 )

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# this is a copay/paste combination of https://gist.github.com/nictuku/13afc808571e742d3b1aaa0310ee8a8d & https://gist.github.com/Rahul91/f051a391fac62ccebb581370b0ac644d

# so that we can install virtualbox via apt-get
for x in xenial xenial-security xenial-updates; do 
  egrep -qe "deb-src.* $x " /etc/apt/sources.list || echo "deb-src http://archive.ubuntu.com/ubuntu ${x} main universe" | sudo tee -a /etc/apt/sources.list
done
echo "deb http://download.virtualbox.org/virtualbox/debian xenial contrib" | sudo tee -a /etc/apt/sources.list.d/virtualbox.list
wget -q https://www.virtualbox.org/download/oracle_vbox_2016.asc -O- | sudo apt-key add -

# allow us to make a kernel

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(*
 *
 * http://deckofcardsapi.com/
 *
 *)

#require "lwt";;
#require "cohttp";;
#require "cohttp-lwt-unix";;