Nautical bell: Difference between revisions

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This version uses local time and speaks the bell rings using OS X's built-in speech synthesizer.

<~~lang~~ applescript>repeat

<syntaxhighlight lang="applescript">repeat

set {hours:h, minutes:m} to (current date)

if {0, 30} contains m then

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end if

delay 60

end repeat</~~lang~~>

end repeat</syntaxhighlight>

==='idle' handler===

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For actions which are to be carried out at set intervals throughout the day, it's more usual to use a stay-open script applet with an 'idle' handler. When such an applet's launched, it sits there mostly doing nothing until it receives an 'idle' command from the system, whereupon it performs the actions in its 'idle' handler. If this handler returns a positive number (or something that can be interpreted as one), the system takes this as the number of seconds to wait before sending another 'idle' command to the applet. Otherwise the default is thirty seconds. This hogs the processor far less than having the script run on a continuous repeat. Unfortunately, depending on how busy the computer is at the time, 'idle' calls may be slightly delayed, so any time checks performed by the handler have to allow for this.

<~~lang~~ applescript>use AppleScript version "2.4" -- OS X 10.10 (Yosemite) or later

<syntaxhighlight lang="applescript">use AppleScript version "2.4" -- OS X 10.10 (Yosemite) or later

use framework "Foundation"

use scripting additions

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-- Request another call in half an hour's time, less however long the above took.

return halfHour - (time of (current date)) mod halfHour

end idle</~~lang~~>

end idle</syntaxhighlight>

=={{header|AutoHotkey}}==

<~~lang~~ ~~AutoHotkey~~>NauticalBell(hh, mm){

<syntaxhighlight lang="autohotkey">NauticalBell(hh, mm){

Hr := 0, min := 30, Bells := [], pattern := []

Loop 8 ; genrate 8 patterns

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Bells[00 ":" 00] := Bells[24 ":" 00] , numBells := Bells[hh ":" mm]

return {"bells": numBells, "pattern": Pattern[numBells]}

}</~~lang~~>

}</syntaxhighlight>

Example:<~~lang~~ ~~AutoHotkey~~>res := ""

Example:<syntaxhighlight lang="autohotkey">res := ""

loop, 24

{

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}

MsgBox, 262144, , % "Time`tBells`tPattern`n" res

return</~~lang~~>

return</syntaxhighlight>

Outputs:<pre>Time Bells Pattern

00:00 8 ** ** ** **

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=={{header|AWK}}==

# syntax: GAWK -f NAUTICAL_BELL.AWK

BEGIN {

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return(new_str)

}

</syntaxhighlight>

</lang>

Output:

<pre>

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Implementation corrected, sounds the system bell as per nautical standards, sounds bell as per local system time.

#include<unistd.h>

#include<stdio.h>

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}

</syntaxhighlight>

</lang>

=={{header|C++}}==

This version uses local time.

<~~lang~~ cpp>

#include <iostream>

#include <string>

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}

//--------------------------------------------------------------------------------------------------

</syntaxhighlight>

</lang>

Output:

<pre>

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=={{header|D}}==

This code uses local time instead of Greenwich Mean Time.

<~~lang~~ d>import std.stdio, core.thread, std.datetime;

<syntaxhighlight lang="d">import std.stdio, core.thread, std.datetime;

class NauticalBell : Thread {

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writeln(e.msg);

}

}</~~lang~~>

}</syntaxhighlight>

This output is from an actual test run.

<pre>

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09:00:00 : 2 bells</pre>

<~~lang~~ freebasic>Dim As Byte m = 0

<syntaxhighlight lang="freebasic">Dim As Byte m = 0

For n As Byte = 0 To 23

If n = 23 Then

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End If

Next n

Sleep</~~lang~~>

Sleep</syntaxhighlight>

=={{header|Go}}==

Provided your terminal bell is enabled, this should beep an appropriate number of times before displaying its output. It uses local time.

<~~lang~~ go>package main

<syntaxhighlight lang="go">package main

import (

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time.Sleep(1 * time.Second)

}

}</~~lang~~>

}</syntaxhighlight>

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=={{header|Haskell}}==

This solution first creates a general way of scheduling tasks on a time interval, and then schedules a "ringing" task. If used in a terminal it will also produce noise. Local time is used.

<~~lang~~ haskell>

import Control.Concurrent

import Control.Monad

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bellRinger = doWithScheduler (onInterval (30*60)) ringBells

</syntaxhighlight>

</lang>

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'''Solution''':<~~lang~~ j>require 'strings printf'

'''Solution''':<syntaxhighlight lang="j">require 'strings printf'

WATCH =: <;._1 ' Middle Morning Forenoon Afternoon Dog First'

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end.

y

)</~~lang~~>

)</syntaxhighlight>

'''Examples''': Invoke <tt>shipsWatch 0</tt>; the output is identical to Raku's.

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This code uses UTC time.

<~~lang~~ java>import java.text.DateFormat;

<syntaxhighlight lang="java">import java.text.DateFormat;

import java.text.SimpleDateFormat;

import java.util.TimeZone;

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}

}</~~lang~~>

}</syntaxhighlight>

Sample output:

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=={{header|Julia}}==

<~~lang~~ julia>using Dates

<syntaxhighlight lang="julia">using Dates

"""

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nauticalbelltask()

</~~lang~~> {{output}} <pre>

</syntaxhighlight> {{output}} <pre>

Nautical bell task starting -- next bell in 1201.726 seconds.

Nautical bell gong strikes 2 2 2

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=={{header|Kotlin}}==

<~~lang~~ scala>// version 1.1.3

<syntaxhighlight lang="scala">// version 1.1.3

import java.text.DateFormat

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}

}</~~lang~~>

}</syntaxhighlight>

Sample output:

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=={{header|Mathematica}}/{{header|Wolfram Language}}==

Works on version 11.2 ARM, a bug prevents this from working on version 11.3 Win64.

<~~lang~~ ~~Mathematica~~>LocalSubmit[ScheduledTask[

<syntaxhighlight lang="mathematica">LocalSubmit[ScheduledTask[

EmitSound[Sound[Table[{

SoundNote["C",750/1000,"TubularBells"],SoundNote[None,500/1000,"TubularBells"]

},Mod[Round[Total[DateList[][[{4,5}]]{2,1/30}]],8,1]]]]

,DateObject[{_,_,_,_,_,30|0}]]]</~~lang~~>

,DateObject[{_,_,_,_,_,30|0}]]]</syntaxhighlight>

=={{header|Nim}}==

Using UTC time but the program can easily be adapted to use local time (replace <code>getTime().utc()</code> with <code>getTime().local()</code> or <code>now()</code>).

<~~lang~~ ~~Nim~~>import os, strformat, times

<syntaxhighlight lang="nim">import os, strformat, times

const

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if m == 0:

nb(d.hour, d.minute)

sleep((1800 - m) * 1000) # In milliseconds.</~~lang~~>

sleep((1800 - m) * 1000) # In milliseconds.</syntaxhighlight>

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=={{header|OoRexx}}==

<~~lang~~ oorexx>/*REXX pgm beep's "bells" (using PC speaker) when running (perpetually).*/

<syntaxhighlight lang="oorexx">/*REXX pgm beep's "bells" (using PC speaker) when running (perpetually).*/

Parse Arg msg

If msg='?' Then Do

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Return res

halt:</~~lang~~>

halt:</syntaxhighlight>

=={{header|Perl}}==

<~~lang~~ perl>use utf8;

<syntaxhighlight lang="perl">use utf8;

binmode STDOUT, ":utf8";

use DateTime;

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}

print "\n";

}</~~lang~~>

}</syntaxhighlight>

<pre style="height:35ex">00:30 Middle watch, One Bell Gone: ♪

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instead of <code>date(DT_GMT)</code>.

Uses a full-length sleep of up to 1800 seconds (half an hour), as it should.

with javascript_semantics

constant watches = {"First","Middle","Morning","Forenoon","Afternoon","First dog","Last dog","First"},

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end while

end if

<pre>

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=={{header|PL/I}}==

This program sounds the bell as well as displaying "gong" an appropriate number of times. It operates on local time.

nautical: procedure options (main); /* 29 October 2013 */

declare (hour, t, i) fixed binary;

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end;

end nautical;

</syntaxhighlight>

</lang>

=={{header|PowerShell}}==

function Get-Bell

{

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Get-Bell -Hour $_ -Minute 30

}

</syntaxhighlight>

</lang>

<pre>

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=={{header|Python}}==

As well as typing output to stdout, this program plays a sound for each bell as the ␇ characters are printed (The spaces between the ␇ characters are mirrored as varying delays between each ring).

<~~lang~~ python>import time, calendar, sched, winsound

<syntaxhighlight lang="python">import time, calendar, sched, winsound

duration = 750 # Bell duration in ms

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if __name__ == '__main__':

ships_bell()</~~lang~~>

ships_bell()</syntaxhighlight>

<pre>00:00, First watch 8 bells ␇ ␇ ␇ ␇ ␇ ␇ ␇ ␇

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that displays \a by playing the system bell, it will play the system bell.

<~~lang~~ racket>#lang racket

<syntaxhighlight lang="racket">#lang racket

(require racket/date)

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(wait-til s)

(format-and-print hours (add1 bells))))

</syntaxhighlight>

</lang>

This might produce the following output:

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Raku uses [[wp:Coordinated_Universal_Time|UTC]] (GMT) time internally and by default. This will display the current UTC time and on the half hour, display a graphical representation of the bell. If run in a terminal with the system bell enabled, will also chime the system alarm bell.

<lang ~~perl6~~>my @watch = <Middle Morning Forenoon Afternoon Dog First>;

<syntaxhighlight lang="raku" line>my @watch = <Middle Morning Forenoon Afternoon Dog First>;

my @ordinal = <One Two Three Four Five Six Seven Eight>;

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print "\n";

}

}</~~lang~~>

}</syntaxhighlight>

<pre>00:00 First watch, Eight Bells Gone: ♫ ♫ ♫ ♫

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Also, some REXXes don't have a   '''sound'''   BIF,   which produces sounds via the PC speaker,

so one is included   <big> [[SOUND.REX|here]]. </big>

<~~lang~~ rexx>/*REXX program sounds "ship's bells" (using PC speaker) when executing (perpetually).*/

<syntaxhighlight lang="rexx">/*REXX program sounds "ship's bells" (using PC speaker) when executing (perpetually).*/

echo= ( arg()\==0 ) /*echo time and bells if any arguments.*/

signal on halt /*allow a clean way to stop the program*/

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call delay 60; if rc\==0 then leave /*ensure we don't re─peel. */

end /*forever*/

halt: /*stick a fork in it, we're all done. */</~~lang~~>

halt: /*stick a fork in it, we're all done. */</syntaxhighlight>

{{out|output|text=  when using the input of:   <big> <tt> the time is: </tt> </big>}}

<pre>

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=={{header|Ring}}==

<~~lang~~ ring>

# Project : Nautical bell

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ok

</syntaxhighlight>

</lang>

Output:

<pre>

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=={{header|Ruby}}==

<~~lang~~ ruby>watches = [ "First", "Middle", "Morning", "Forenoon", "Afternoon", "First dog", "Last dog", "First" ]

<syntaxhighlight lang="ruby">watches = [ "First", "Middle", "Morning", "Forenoon", "Afternoon", "First dog", "Last dog", "First" ]

watch_ends = [ "00:00", "04:00", "08:00", "12:00", "16:00", "18:00", "20:00", "23:59" ]

words = ["One","Two","Three","Four","Five","Six","Seven","Eight"]

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end

sleep 1

end</~~lang~~>

end</syntaxhighlight>

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=={{header|Seed7}}==

<~~lang~~ seed7>$ include "seed7_05.s7i";

<syntaxhighlight lang="seed7">$ include "seed7_05.s7i";

include "time.s7i";

include "duration.s7i";

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flush(OUT);

end while;

end func;</~~lang~~>

end func;</syntaxhighlight>

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=={{header|Tcl}}==

This code was originally based on the [[#Raku|Raku]] version, but with numerous adaptations, alterations and (some) corrections.

<~~lang~~ tcl># More sophisticated versions are possible, such as playing a bell sample

<syntaxhighlight lang="tcl"># More sophisticated versions are possible, such as playing a bell sample

# using the Snack library.

proc ringTheBell {} {

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fconfigure stdout -buffering none

every 1000 nauticalBell

vwait forever; # Only needed if not running an event loop otherwise</~~lang~~>

vwait forever; # Only needed if not running an event loop otherwise</syntaxhighlight>

<pre>

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On my system (Ubuntu 20.04), the bell only rings once no matter how many \a's are concatenated togther, though it may be different on other systems.

<~~lang~~ ecmascript>import "os" for Process

<syntaxhighlight lang="ecmascript">import "os" for Process

import "timer" for Timer

import "/date" for Date

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Timer.sleep(1000)

now = now.addSeconds(1)

}</~~lang~~>

}</syntaxhighlight>