Any Muslims around?

ruby-talk
1

Just wondering if any Muslims have gotten around to making a Ruby script that like plays a sound or something when it's time for prayer.

Thanks,
Kyrre Nygård

2

Just wondering if any Muslims have gotten around to making a
Ruby script
that like plays a sound or something when it's time for prayer.

I guess time for prayer is at certain times per day? You could
get the current time with Time.now, then sleep the appropriate
time to the next prayer, and then wake up and to whatever you
would like to do.

Ronald

3

Would this help? I use it as part of a suite of scripts for computing
times that Orthodox Jews use to compute times for prayer. The algorithm
comes from the US Naval Observatory's Almanac for Computers.

--Ken

require 'date'
require 'mathn'

#methods stolen from ruby-doc.org
class Date
   def to_datetime() DateTime.new0(self.class.jd_to_ajd(jd, 0, 0), @of,
@sg) end
   def to_date() self end
   def to_time() Time.local(year, mon, mday) end
end
class DateTime
  def to_date() Date.new0(self.class.jd_to_ajd(jd, 0, 0), 0, @sg) end
  def to_datetime() self end
  def to_time
    d = new_offset(0)
    d.instance_eval do
      Time.utc(year, mon, mday, hour, min, sec,
               (sec_fraction * 86400000000).to_i)
    end.
        getlocal
  end
end

#end stolen

def dms(degrees,minutes,seconds)
   degrees+minutes/60+seconds/60/60
end

module Sunrise
   include Math
   class Location
      attr_accessor :latitude, :longitude, :offset
      def initialize(latitude,longitude)
   @latitude,@longitude=latitude,longitude
      end
   end

   def toRad(degrees)
      degrees*PI/180
   end

   def toDeg(radians)
      radians*180/PI
   end

   def sun_rise_set(which,date,location,zenith)
      #step 1: first calculate the day of the year
      n=date.yday

      #step 2: convert the longitude to hour value and calculate an
approximate time
      lngHour=location.longitude/15
      t=n+ ((6-lngHour)/24) if which==:sunrise
      t=n+ ((18-lngHour)/24) if which==:sunset

      #step 3: calculate the sun's mean anomaly
      m=(0.9856 * t) - 3.289

      #step 4: calculate the sun's true longitude
      l= (m+(1.1916 * sin(toRad(m))) + (0.020 * sin(toRad(2*m))) +
282.634) % 360

      #step 5a: calculate the sun's right ascension
      ra = toDeg(atan(0.91764 * tan(toRad(l)))) % 360
      ###step 5b: right ascension value needs to be in the same quadrant
as L
      lquadrant = (l/90).floor*90
      raquadrant = (ra/90).floor*90
      ra=ra+(lquadrant-raquadrant)

      #step 5c: right ascension value needs to be converted into hours
      ra/=15

      #step 6: calculate the sun's declination
      sinDec = 0.39782 * sin(toRad(l))
      cosDec = cos(asin(sinDec))
      #step 7a: calculate the sun's local hour angle
      cosH = (cos(toRad(zenith)) - (sinDec * sin(toRad
(location.latitude)))) / (cosDec * cos(toRad(location.latitude)))

      return nil if (not (-1..1).include? cosH)

      #step 7b: finish calculating H and convert into hours
      h = (360 - toDeg(acos(cosH)))/15 if which==:sunrise
      h = (toDeg(acos(cosH)))/15 if which==:sunset
      #step 8: calculate local mean time
      t = h + ra - (0.06571 * t) - 6.622
      t %=24
      #step 9: convert to UTC
      return date.to_datetime+(t - lngHour)/24
   end

   private :sun_rise_set

   def sunrise(date,location,zenith=90.8333)
      sun_rise_set :sunrise,date,location,zenith
   end
   def sunset(date,location,zenith=90.8333)
      sun_rise_set :sunset,date,location,zenith
   end
end

···

On Tue, 14 Aug 2007 20:50:02 +0900, Kyrre Nygård wrote:

Just wondering if any Muslims have gotten around to making a Ruby script
that like plays a sound or something when it's time for prayer.

Thanks,
Kyrre Nygård

--
Ken Bloom. PhD candidate. Linguistic Cognition Laboratory.
Department of Computer Science. Illinois Institute of Technology.
http://www.iit.edu/~kbloom1/

4

Hi,

you could also have a look at :

http://openwferu.rubyforge.org/scheduler.html

to install it :

   sudo gem install openwferu-scheduler

then write a program that looks like :

---8<---

require 'rubygems'
require 'openwfe/util/scheduler'

include OpenWFE

scheduler = Scheduler.new
scheduler.start

scheduler.schedule("0 6 * * *") do
   puts "time for the morning prayer"
end
scheduler.schedule("0 12 * * *") do
   puts "time for the noon prayer"
end

# or

scheduler.schedule("0 6,8,12,16,18 * * *") do
   puts "bismillah..."
end
--->8---

The scheduler follows the "cron" convention
(man 5 crontab\ - Google Search)

Maybe you're better off with a ruby program triggered by the cron in
your system (if it's a Unix / MacOSX one).

Best regards,

···

On 8/14/07, Ronald Fischer <ronald.fischer@venyon.com> wrote:

> Just wondering if any Muslims have gotten around to making a
> Ruby script
> that like plays a sound or something when it's time for prayer.

I guess time for prayer is at certain times per day? You could
get the current time with Time.now, then sleep the appropriate
time to the next prayer, and then wake up and to whatever you
would like to do.

--
John Mettraux -///- http://jmettraux.openwfe.org

5

Thanks a lot Ken, and the same to you guys, Ronald and John.

I'll report back to base once I got something.

All the best,
Kyrre Nygård

Ken Bloom wrote:

···

On Tue, 14 Aug 2007 20:50:02 +0900, Kyrre Nygård wrote:

Just wondering if any Muslims have gotten around to making a Ruby script
that like plays a sound or something when it's time for prayer.

Thanks,
Kyrre Nygård
    
Would this help? I use it as part of a suite of scripts for computing times that Orthodox Jews use to compute times for prayer. The algorithm comes from the US Naval Observatory's Almanac for Computers.

--Ken

require 'date'
require 'mathn'

#methods stolen from ruby-doc.org
class Date
   def to_datetime() DateTime.new0(self.class.jd_to_ajd(jd, 0, 0), @of, @sg) end
   def to_date() self end
   def to_time() Time.local(year, mon, mday) end
end
class DateTime
  def to_date() Date.new0(self.class.jd_to_ajd(jd, 0, 0), 0, @sg) end
  def to_datetime() self end
  def to_time
    d = new_offset(0)
    d.instance_eval do
      Time.utc(year, mon, mday, hour, min, sec,
               (sec_fraction * 86400000000).to_i)
    end.
        getlocal
  end end

#end stolen

def dms(degrees,minutes,seconds)
   degrees+minutes/60+seconds/60/60
end

module Sunrise
   include Math
   class Location
      attr_accessor :latitude, :longitude, :offset
      def initialize(latitude,longitude)
   @latitude,@longitude=latitude,longitude
      end
   end

   def toRad(degrees)
      degrees*PI/180
   end

   def toDeg(radians)
      radians*180/PI
   end

   def sun_rise_set(which,date,location,zenith)
      #step 1: first calculate the day of the year
      n=date.yday

      #step 2: convert the longitude to hour value and calculate an approximate time
      lngHour=location.longitude/15
      t=n+ ((6-lngHour)/24) if which==:sunrise
      t=n+ ((18-lngHour)/24) if which==:sunset

      #step 3: calculate the sun's mean anomaly
      m=(0.9856 * t) - 3.289

      #step 4: calculate the sun's true longitude
      l= (m+(1.1916 * sin(toRad(m))) + (0.020 * sin(toRad(2*m))) + 282.634) % 360

      #step 5a: calculate the sun's right ascension
      ra = toDeg(atan(0.91764 * tan(toRad(l)))) % 360
      ###step 5b: right ascension value needs to be in the same quadrant as L
      lquadrant = (l/90).floor*90
      raquadrant = (ra/90).floor*90
      ra=ra+(lquadrant-raquadrant)

      #step 5c: right ascension value needs to be converted into hours
      ra/=15

      #step 6: calculate the sun's declination
      sinDec = 0.39782 * sin(toRad(l))
      cosDec = cos(asin(sinDec))
      #step 7a: calculate the sun's local hour angle
      cosH = (cos(toRad(zenith)) - (sinDec * sin(toRad
(location.latitude)))) / (cosDec * cos(toRad(location.latitude)))

      return nil if (not (-1..1).include? cosH)

      #step 7b: finish calculating H and convert into hours
      h = (360 - toDeg(acos(cosH)))/15 if which==:sunrise
      h = (toDeg(acos(cosH)))/15 if which==:sunset
      #step 8: calculate local mean time
      t = h + ra - (0.06571 * t) - 6.622
      t %=24
      #step 9: convert to UTC
      return date.to_datetime+(t - lngHour)/24
   end

   private :sun_rise_set

   def sunrise(date,location,zenith=90.8333)
      sun_rise_set :sunrise,date,location,zenith
   end
   def sunset(date,location,zenith=90.8333)
      sun_rise_set :sunset,date,location,zenith
   end
end

6

John Mettraux wrote:

  

Just wondering if any Muslims have gotten around to making a
Ruby script
that like plays a sound or something when it's time for prayer.
      

I guess time for prayer is at certain times per day? You could
get the current time with Time.now, then sleep the appropriate
time to the next prayer, and then wake up and to whatever you
would like to do.
    
Hi,

you could also have a look at :

http://openwferu.rubyforge.org/scheduler.html

to install it :

   sudo gem install openwferu-scheduler

then write a program that looks like :

---8<---

require 'rubygems'
require 'openwfe/util/scheduler'

include OpenWFE

scheduler = Scheduler.new
scheduler.start

scheduler.schedule("0 6 * * *") do
   puts "time for the morning prayer"
end
scheduler.schedule("0 12 * * *") do
   puts "time for the noon prayer"
end

# or

scheduler.schedule("0 6,8,12,16,18 * * *") do
   puts "bismillah..."
end
--->8---

The scheduler follows the "cron" convention
(man 5 crontab\ - Google Search)

Maybe you're better off with a ruby program triggered by the cron in
your system (if it's a Unix / MacOSX one).

Best regards,

Some awesome suggestions here, but I think it's a bit more complex considering how times vary from location to location. I guess I'll have to try to make sense out of http://www.arabeyes.org/project.php?proj=ITL\. As I said though, I'll report back to base once I got something.

Thanks again guys!

All the best,
Kyrre

···

On 8/14/07, Ronald Fischer <ronald.fischer@venyon.com> wrote:

7

Some awesome suggestions here, but I think it's a bit more complex
considering how times vary from location to location.

But you have the timezone for each location, right? If you use the
DateTime
class for calculating times, you can convert between time zones using
the
new_offset method, if you know the offset of the respective time zone to
UTC.

If you only know the *name* of the time zone, there is a hack on how
to do it using the Time class, described in the "Ruby Cookbook" (which I

would recommend buying anyway). This hack works if your operating system

honours the TZ environment variable. You switch temporarily to this zone

(by changing TZ), get the local time there, and switch back to your own
zone. You then have the time diff to your zone, and you can always get
the time UTC time by calling Time#gmtime.

Ronald

···

--
Ronald Fischer <ronald.fischer@venyon.com>
Phone: +49-89-452133-162

8

I prefer the tzfile gem for dealing with timezones.

--Ken

···

On Thu, 16 Aug 2007 17:07:43 +0900, Ronald Fischer wrote:

Some awesome suggestions here, but I think it's a bit more complex
considering how times vary from location to location.

But you have the timezone for each location, right? If you use the
DateTime class for calculating times, you can convert between time
zones using the new_offset method, if you know the offset of the
respective time zone to UTC.

If you only know the *name* of the time zone, there is a hack on how to
do it using the Time class, described in the "Ruby Cookbook" (which I
would recommend buying anyway). This hack works if your operating system
honours the TZ environment variable. You switch temporarily to this zone
(by changing TZ), get the local time there, and switch back to your own
zone. You then have the time diff to your zone, and you can always get
the time UTC time by calling Time#gmtime.

Ronald

--
Ken Bloom. PhD candidate. Linguistic Cognition Laboratory.
Department of Computer Science. Illinois Institute of Technology.
http://www.iit.edu/~kbloom1/