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Interval.pm  view on Meta::CPAN

    '+'   => \&_plus,
    '-'   => \&_minus,
    '<'   => \&_smaller_than,
    '>'   => \&_greater_than,
    '=='  => \&_equal,
    '!='  => \&_not_equal,
    '<=>' => \&_spaceship,
    qw("" _stringify);

# Must set the time zone to use Date::Manip
BEGIN {$Date::Manip::TZ = "CET";} # Default Central European Time

##############################################################################
# Constants
##############################################################################

# Boolean values
$FALSE = 0;
$TRUE  = 1;

# <value type>

Interval.pm  view on Meta::CPAN

    of $int1 again at the 28th of October you get 7 days.

    I am working on additional support for relative Intervals.

=head2 Defaults 

    The default interval type is right open intervals. Stick to this
    interval type if you want to keep life simple.

    To use Date::Manip the time zone variable must be set. It is
    default set to Central European Time (CET). For Americans, this is
    the Capital of Stockholm :-).

    To change the time zone, e.g., to Eastern Standard Time (EST) put
    in our script $Date::Manip::TZ = 'EST'; (As an European I assume
    this must be close to Atlanta, New Mexico).

    The default input format is default of Date::Manip, that is
    "10-12-1997" is the 12th of October 1997 not the 10th of December
    1997. To change the input format, e.g., put in our script
    &Date::Manip::Date_Init("DateFormat=non-US");

Interval.pm  view on Meta::CPAN

    - Changed the default separator to the $, special variable
    - Added support for comparison of relative intervals 

    Changes thanks to Tim Bruce
    - Changed the module name from Interval to Date::Interval
    - Added methods getStart and getStop.
    - Added method lengthString to print nicely the length of the
      interval.
    - Changed the default output format to be similar to the 
      default input format
    - Taken BEGIN {$Date::Manip::TZ = "CET"; &Date_Init ("DateFormat=non-US");}
      out because it is anti-social :-)
    - Added to POD that the both dates and times can be used with intervals
    - Added to POD the description of open and closed intervals

=head1 LITTERATURE

    Allen, J. F., "An Interval-Based Representation of Temporal Knowledge",
    Communication of the ACM, 26(11) pp. 832-843, November 1983.

=head1 AUTHORS