# 以åããŠãªãŠã¹æŠãé幎ã®è©±é¡ããã£ãã®ã§ãfj.sci.astro ãéž
# ã³ãŸããããã£ãšé©åœãª NewsGroup ããã£ããæ¯ã£ãŠäžããã
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幎ã 3 幎㫠1 床ã«ããŠããŸãã
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ã ta...@yk.rim.or.jp
ã http://www.yk.rim.or.jp/âŸtabby/
http://www.tondering.dk/claus/calendar.html
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ïŒïŒªïŒ€ã®èšç®ã¯ http://aa.usno.navy.mil/data/docs/JulianDate.html 㧠ïŒç°äžäºé
TANAKA Jiro <ji...@nerimadors.or.jp> wrote in
message <87it052...@ace.nerimadors.or.jp>:
> http://www.tondering.dk/claus/calendar.html
> ã®ãïŒç« ãããã¯ãåŠäœã§ãããïŒ
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é 匵ã£ãŠèªãã§ã¿ãŸã(ããã£ãè±æã ã)ã
> ïŒïŒªïŒ€ã®èšç®ã¯ http://aa.usno.navy.mil/data/docs/JulianDate.html 㧠ïŒç°äžäºé
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TANAKA Jiro <ji...@nerimadors.or.jp> wrote in
message <87it052...@ace.nerimadors.or.jp>:
> http://www.tondering.dk/claus/calendar.html
> ã®ãïŒç« ãããã¯ãåŠäœã§ãããïŒ
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ãAugustus ã 8 æã®æ¥æ°ãå¢ãããããšãã話ã«ãæ ¹æ ããªãã
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# æ ¹æ ã«èªçæ¥èª¬ãšæŠåèšå¿µèª¬ã® 2 ã€ããã£ãŠæ··ä¹±ããŠãã蟺ãã¯ã
# äŒèª¬ã®äŒèª¬ããæ以?
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strlwr() 㯠Unix ã«ã¯ãªãã®ã§ãããã ãèªåã§æãŠã° BSD ãªã©
ã§ãã³ã³ãã€ã«ã§ãã kterm ãªã©ã§ã¯ -c ã䜿ããããã§ãã
strlwr() ãå®çŸããã«ã¯ tolower() ã䜿ã£ãŠãè¯ãã§ãããã
tolower() 㯠ISO/IEC 9899:1990 ã«å«ãŸããããã§ãã
ã¡ãªã¿ã«Rubyã§ã¯æšæºã©ã€ãã©ãª Date ã䜿ãããšãã§ããŸããæ¥
ä»ã¯Dateãªããžã§ã¯ããšããŠè¡šçŸãããå
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http://www.ruby-lang.org/ja/man-1.6/?cmd=view;name=Date
% ruby -r date -e 'p Date.new(2002,10,1).jd'
2452549
% ruby -r date -e 't = Date.today; puts t, t.jd'
2002-10-16
2452564
ãã§ã«ãåç¥ããç¥ããŸããã Date ã®äœè
ããŸã cal äºæã®
cal.rb ãšãããã®ãå
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http://www.funaba.org/ruby.html#cal
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GOTO Kentaro <got...@notwork.org> wrote in
message <g8bhoa....@miso.k.notwork.org>:
> strlwr() 㯠Unix ã«ã¯ãªãã®ã§ãããã ãèªåã§æãŠã° BSD ãªã©
> ã§ãã³ã³ãã€ã«ã§ãã kterm ãªã©ã§ã¯ -c ã䜿ããããã§ãã
ãã©ããŒããããšãããããŸãã
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ãè¿ããŠãããªããŠããããåã ã£ããããªãã§ãã
smash case ã§ã¯ãªã UNIX ã§ã¯ãããããªãæ¹ãããã§ããããã
DOS ã®ä»ã®åŠçç³»ã§ãæã£ãŠããªãé¢æ°ã§ããå¯èœæ§ããææã®é
ããªã®ã§ãæå
ã§ã¯ LSI-C ã§ã³ã³ãã€ã«ãããæã ã strlwr() ã
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ã« Web ãæŽæ°ããŸãã
> ã¡ãªã¿ã«Rubyã§ã¯æšæºã©ã€ãã©ãª Date ã䜿ãããšãã§ããŸããæ¥
> ä»ã¯Dateãªããžã§ã¯ããšããŠè¡šçŸãããå
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Ruby ã¯ãæ°ã«å
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ä»è©ŠããŠã¿ãæâŠ
% ruby -v -r date -e 'p Date.new(1,1,1).jd'
ruby 1.6.7 (2002-03-01) [i586-mswin32]
1721424
âŠãšãªããŸããããã¡ãããã¯ããŠãªãŠã¹æŠã®çœ®éã®æ··ä¹±æãåæ
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ã ããæ±ããããã«ãããŠãªãŠã¹æŠããã°ã¬ãŽãªãªæŠãžã®æ¹æŠæ¥ã¯
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ã°ããã« ruby-list ã¡ãŒãªã³ã°ãªã¹ããããã§åãåãããŠã¿ãŠ
ã¯ã©ãã§ãããã? æšæºã©ã€ãã©ãªã§ãã®ã§Rubyã®ãŠãŒã¶ãšããŠã¯
æ¹è¯ããããšå¬ããã§ãã
ãšããã§ãããããããã® cal.c ã«ãã£ã ymd2jd() ã䜿ã£ãŠçŽ
å
å4713幎1æ1æ¥ã®JDãæ±ãããš366æ¥ã«ãªããŸããããããã¯ã
ããããã®(calã«å¿
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ãªããŸãã
% ./a.out -4712 1 1
JD(-4712,1,1) = 366
% ruby -r date -e 'puts Date.new(-4712,1,1).jd'
0
# ä»æ¥ãŸã§ã®å
šéšã®JDãæ¯èŒãããããšäžç¬æããŸããããcal.c
# ã« jd2ymd() ã¯ãªããããªã®ã§ãããŸãã :)
ããšãã
#include <stdlib.h>
#include <stdio.h>
int
main(int argc, char *argv[])
{
int y = -4712, m = 1, d = 1;
if (argc > 1) y = atoi(argv[1]);
if (argc > 2) m = atoi(argv[2]);
if (argc > 3) d = atoi(argv[3]);
printf("JD(%d,%d,%d) = %ld\n", y, m, d, ymd2jd(y, m, d));
return 0;
}
GOTO Kentaro <got...@notwork.org> wrote in
message <fc0joa....@miso.k.notwork.org>:
> ãªãã»ã©ãåã¯äœè
ã§ãªãã®ã§çç±ã¯åãããŸããããæãã«ãã®
> ã¯ã©ã¹ã¯Meeusã®ã¢ã«ãŽãªãºã ã«ãã£ãŠã°ã¬ãŽãªãªæŠãšãŠãªãŠã¹æŠ
> ã ããæ±ããããã«ãããŠãªãŠã¹æŠããã°ã¬ãŽãªãªæŠãžã®æ¹æŠæ¥ã¯
> å€æŽå¯èœã«ãããã©ãããŒãã®äºæ
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> 现ã¯èæ
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ãæŽå²çã«ã¯ééãã ããããç¹å®ã®æ¥ãè¡šçŸããçºã®æ¹äŸ¿ã§ãã
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ãšéããã ãã©âŠããšã
ã質åãå®æçã«èã蟌ãã®ã«èããããããšã :-)
> ãšããã§ãããããããã® cal.c ã«ãã£ã ymd2jd() ã䜿ã£ãŠçŽ
> å
å4713幎1æ1æ¥ã®JDãæ±ãããš366æ¥ã«ãªããŸããããããã¯ã
> ããããã®(calã«å¿
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> ãã?
ããããŒããç¹ç°ç¹ã«ããŠãB.C.4713 㯠-4713 ã§æ±ã£ãŠããŸãã®
ã§ãã¡ãããšãŒãã«ãªããŸãã
> # ä»æ¥ãŸã§ã®å
šéšã®JDãæ¯èŒãããããšäžç¬æããŸããããcal.c
> # ã« jd2ymd() ã¯ãªããããªã®ã§ãããŸãã :)
ãã¡ãã¯ç 究äžã§ããæ¹é ã®å
ã«ãªã jd2ymd() ãæ¢ããŠããæã§ã
åè£ãä»ã®æ 4 ã€çšéãŸã£ãŠããŸãã
ãã¹ãã«ãŒãã³ã ãã¯ããåºæ¥äžãã£ãŠããŠãæ¥ä»ãçºçãããŠã®
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KUROSAWA Takashi <ta...@yk.rim.or.jp> wrote in
message <aojquh$1veg$1...@news2.rim.or.jp>:
> > # ä»æ¥ãŸã§ã®å
šéšã®JDãæ¯èŒãããããšäžç¬æããŸããããcal.c
> > # ã« jd2ymd() ã¯ãªããããªã®ã§ãããŸãã :)
>
> ãã¡ãã¯ç 究äžã§ããæ¹é ã®å
ã«ãªã jd2ymd() ãæ¢ããŠããæã§ã
> åè£ãä»ã®æ 4 ã€çšéãŸã£ãŠããŸãã
åºæ¥ãŸããã
ymd2jd() ã jd2ymd() ããäŒçµ±ã¢ãŒã(åŸæ¥ã® 4 幎æ¯ã®çœ®é)ãšæŽ
å²ã¢ãŒã(ãŠãªãŠã¹æŠã®æ··ä¹±æãåæ )ãåçã«åãæ¿ããããŸãã
JD=0 ãã çŸåšãŸã§ã®æ€æ»ã¯æžãŸããŠãããŸãã
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