Averages/Mean time of day: Difference between revisions

=={{header|Sidef}}==

{{trans|Ruby}}

Using the '''mean_angle()''' function from: [http://rosettacode.org/wiki/Averages/Mean_angle#Sidef "Averages/Mean angle"]

<lang ruby>func time2deg(t) {

t ~~ /^(\d\d):(\d\d):(\d\d)$/ || die "invalid time";

var (hh,mm,ss) = [$1, $2, $3].map{.to_i}...;

((hh ~~ 0...23) && (mm ~~ 0...59) && (ss ~~ 0...59)) || die "invalid time";

(hh*3600 + mm*60 + ss) * 360 / 86400;

}

func deg2time(d) {

var sec = ((d % 360) * 86400 / 360);

"%02d:%02d:%02d" % [sec/3600, (sec%3600)/60, sec%60];

}

func mean_time(times) {

deg2time(mean_angle(times.map {|t| time2deg(t)}));

}

say mean_time(["23:00:17", "23:40:20", "00:12:45", "00:17:19"]);</lang>

{{out}}

<pre>23:47:43</pre>