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Calendar
Calendar.TimeRange
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Method Calendar.TimeRange()->`+()
- Method
`+
TimeRange `+(int n)
TimeRange `+(TimeRange offset)
TimeRange `-(int m)
TimeRange `-(TimeRange x)
- Description
-
This calculates the (promoted) time period
either n step away or with a given offset.
These functions does use add to really
do the job:
t+n t->add(n) t is a time period
t-n t->add(-n) offset is a time period
t+offset t->add(1,offset) n is an integer
t-offset t->add(-1,offset)
n+t t->add(n)
n-t illegal
offset+t offset->add(1,t) | note this!
offset-t offset->add(-1,t) |
Mathematic rules:
x+(t-x) == t x is an integer or a time period
(x+t)-x == t t is a time period
(t+x)-x == t
o-(o-t) == t o is a time period
t++ == t+1
t-- == t-1
- Note
-
a-b does not give the distance between the start of a and b.
Use the distance () function to calculate that.
The integer used to `+, `- and add are the number
of steps the motion will be. It does never represent
any fixed amount of time, like seconds or days.
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