Daily Challenge #75 - Set Alarm

Write a function named setAlarm which receives two parameters. The first parameter, employed, is true whenever you are employed and the second parameter, vacation is true whenever you are on vacation.

The function should return true if you are employed and not on vacation (because these are the circumstances under which you need to set an alarm). It should return false otherwise.

Example:

setalarm(true, true) -> false
setalarm(false, true) -> false
setalarm(false, false) -> false
setalarm(true, false) -> true

---

This challenge comes from Swolebrain at CodeWars, who has licensed redistribution of this challenge under the 2-Clause BSD License!

Want to propose a challenge idea for a future post? Email [e-mail] with your suggestions!

Comments

[K.V.Harish]

My solution in js

const setAlarm = (employed = true, vacation = true) => employed && !vacation;

No prior experience in Python just wanted to give it a try. Like it :) Going to spend more time on the docs in the coming days.

My solution in Python

def setAlarm(employed = True, onVacation = True):
  return employed and not onVacation

[karthick rajan]

Solved On Purescript

setAlarm :: Boolean -> Boolean -> Boolean
setAlarm employed vacation =
   case (Tuple employed vacation) of
     (Tuple true false) ->
         true

     (Tuple _ _) ->
         false       

[@nobody]

crackin' out the ol' Clojure 🤔

(ns dailyChallenge.seventyFive)

(defn- setAlarm [& {:keys [employed? vacation?]}]
  "A vacation is what you take when you can no longer take what you've
   been taking - Wise Man #42"
  (cond 
    (and employed? vacation?) false
    (and employed? (not vacation?)) true))

don't test me 😗

(deftest sunrise_mutha_fcka
 (is (= true (setAlarm :employed? true :vacation? false))
 (is (= false (and
                (setAlarm :employed? false :vacation? false)
                (setAlarm :employed? true :vacation? true) 
                (setAlarm :employed? false :vacation? true)))))
                  ;;i don't know if you can be unemployed and temporarily away 
                  ;;from work | in fact, you can't. 🤔🤔🤔

(run-tests 'dailyChallenge.seventyFive)

at least with named non-positional parameters . . .

. . . there's less confusion about how silly this is 😂

[Avalander]

Haskell

set_alarm :: Bool -> Bool -> Bool
set_alarm True False = True
set_alarm a b        = False

[Vinnie]

JS:

const setalarm = (e,v) => e && !v;

[Peter]

In go:

func setAlarm(e, v bool) bool {
    return e && !v
}

Go Playground example

[willsmart]

How about prolog?
A file with one fact should do it...

setAlarm(true,false).

To run..

> gprolog --consult-file setAlarm.pl
GNU Prolog 1.4.5 (64 bits)
Compiled Aug 20 2018, 15:27:00 with clang
By Daniel Diaz
Copyright (C) 1999-2018 Daniel Diaz
compiling /Users/Will/setAlarm.pl for byte code...
/Users/Will/setAlarm.pl compiled, 1 lines read - 257 bytes written, 4 ms
| ?- setAlarm(false,false).

no
| ?- setAlarm(false,true).

no
| ?- setAlarm(true,false).

yes
| ?- setAlarm(true,true).

no

[@nobody]

Prolog still scares me . . . not its syntax, but seemingly untapped potential.

[Zohar Peled]

I'm sorry, but it seems like you've lost the challenge somewhere.

At first I thought I've probably missed something, but then I saw the comments and realized it wasn't me, it was whoever came up with this challenge.

If I may offer a twist - Do it in a language you've never worked with before.
I'll take Scala for a ride on this one:

object challenge {
   def setAlarm( employed:Boolean, vacation:Boolean ) : Boolean = {
      return employed && !vacation
   }
}

Nope, sorry, still too easy.

[jess unrein]

Java

public class Employment
{
  private static boolean setAlarm(boolean employed, boolean vacation) {
    return employed && !vacation;
  }

  public static void main(String[] args)
  {
    System.out.println(setAlarm(false, false));
    System.out.println(setAlarm(false, true));
    System.out.println(setAlarm(true, true));
    System.out.println(setAlarm(true, false));
  }
}

[Manjunath Hegde]

In C#

Public bool setalarm(bool employed = false, bool vacation = false){
return !vacation && employed;
}

[Jérémie Astor]

nicer with some formatting:

Public bool setalarm(bool employed = false, bool vacation = false){
  return !vacation && employed;
}

Interresting of you use vacation first and your use of default values 😄

[Jérémie Astor]

in Gwion.
Using the newly implemented pattern matching ability.

fun int setalarm(const bool employed, const bool vacation) {
  match employed {
    case true: return !vacation;
    case _: return false;
  }
}

<<< setalarm(true, true) >>>;
<<< setalarm(false, true) >>>;
<<< setalarm(false, true) >>>;
<<< setalarm(true, false) >>>;

I should implement implicit casting from bool to int and vice-versa.

---

EDIT: done and working.

BONUS:

• set ! operator as boolean, which hopefully makes more sense
• demonstrate (very) bad git usage 😕

[Oleksii Filonenko]

Elixir:

def set_alarm(true, false), do: true
def set_alarm(_, _), do: false

[Oleksii Filonenko]

x86-64 assembly (NASM syntax):

section .text
global set_alarm
set_alarm:
    mov rax, rsi
    not rax
    and rax, rdi
    ret

[jess unrein]

Python with optional typing indicators and tests

def set_alarm(employed: bool, vacation: bool) -> bool:
  return employed and not vacation

assert not set_alarm(True, True)
assert not set_alarm(False, True)
assert not set_alarm(False, False)
assert set_alarm(True, False)