[EMAIL PROTECTED] escribió: > On Thu, 2008-03-13 at 15:48 +0000, Dave Howorth wrote: > >> Martin (OpenGeoMap) wrote: >> >>> I am building an intermediate unit system for engineeres in Gobject and >>> i hope publish this library soon. >>> With this system you always work in lineal measures in meters (double), >>> and you can input others (inches, centimeters) >>> >>> input system - intermediate system -out system >>> >>> you can input in a entry for example (22m, 22 m, 220cm,...) and >>> internally you have a double always in meters. >>> >> How do you deal with precision? 22 m is not the same as 22.000 m >> > > Yes 22 m is the same as 22.000 m, but the user can be enter both and PCRE must understand this. /(\d+\.?\*)(\s*m)/ If you have "22.000 m" in PERL you have $1="22.000" and $2="m"
PERL Regular expresions are great in C also, but better in perl and Ruby 8-) To learn a little about regular expresion you need a PERL book: http://www.oreilly.com/catalog/regex/ > Bad example. 22 can be expressed exactly in 2s complement. 3 cannot. > > :-\ >> Cheers, Dave >> _______________________________________________ >> gtk-app-devel-list mailing list >> gtk-app-devel-list@gnome.org >> http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list >> _______________________________________________ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
