Finding differences between dates

ruby-talk
1

i have 2 dates in mm/dd/yyyy format and i need to find the number of days in
between them. i have googled both the web and the ruby newsgroup and haven't
found anything that addresses this.

for what it's worth, this is what the perl code looks like that i am trying to
convert to ruby :

#!/usr/bin/perl
use Time::Local ; # for days_between subroutine

···

###################################################
# return the absolute value of the difference between two dates

sub days_between {

    my $first_date = $_[0] ;
    my $second_date = $_[1] ;

    my ($month1, $day1, $year1) = (split /\//, $first_date) ;
    my ($month2, $day2, $year2) = (split /\//, $second_date) ;

    my $date1 = timelocal 0, 0, 0, $day1, $month1 - 1, $year1 - 1900 ;
    my $date2 = timelocal 0, 0, 0, $day2, $month2 - 1, $year2 - 1900 ;
    return abs(($date2 - $date1) / 86400) ; # the number of seconds in a day
}
###################################################

thanks

joe

2

Use the Date class:

irb(main):008:0> require 'date'
=> true
irb(main):009:0> Date.parse('11/05/1994') - Date.parse('3/7/1988')
=> Rational(2434, 1)

3

interesting.

my primary source for ruby information is the first edition of the Pickaxe
book. didn't find anything about "parse" under Date. now i know.

thank you

joe

···

On June 24, 2005 10:33, Paul Brannan wrote:

Use the Date class:

irb(main):008:0> require 'date'
=> true
irb(main):009:0> Date.parse('11/05/1994') - Date.parse('3/7/1988')
=> Rational(2434, 1)