Date manipulation: Difference between revisions
Add Factor example
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12 hours later in local time: 08.03.2009 13:30:00
12 hours later in EST : 08.03.2009 07:30:00</pre>
=={{header|Factor}}==
<lang factor>USING: calendar calendar.english calendar.format calendar.parser
combinators io kernel math math.parser sequences splitting
unicode ;
IN: rosetta-code.date-manipulation
: parse-hm ( str -- hours minutes )
":" split first2 [ digit? ] partition
[ [ string>number ] bi@ ] dip "pm" = [ [ 12 + ] dip ] when ;
! Parse a date in the format "March 7 2009 7:30pm EST"
: parse-date ( str -- timestamp )
" " split {
[ first month-names index 1 + ]
[ second string>number ]
[ third string>number -rot ]
[ fourth parse-hm 0 ]
[ last parse-rfc822-gmt-offset ]
} cleave <timestamp> ;
"March 7 2009 7:30pm EST" parse-date dup 12 hours time+
[ timestamp>rfc822 print ] bi@</lang>
{{out}}
<pre>
Sat, 7 Mar 2009 19:30:00 -0500
Sun, 8 Mar 2009 07:30:00 -0500
</pre>
=={{header|Fantom}}==
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