before ( duration -- -duration )
Calendar ยป Relative timestamps
Prev:ago ( duration -- timestamp )
Next:sunday ( timestamp -- timestamp' )


Vocabulary
calendar

Inputs
durationa duration


Outputs
-durationa duration


Word description
Negates a duration.

Examples
USING: accessors calendar prettyprint ; 3 hours before now noon time+ hour>> .
9


Definition
IN: calendar

: before ( duration -- -duration ) -1 duration* ;