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- `wday` (optional)
timetable components may be outside of their standard range (e.g. a month component of
- `wday` (optional)
timetable components may be outside of their standard range (e.g. a month component of
-14) to faciliate arithmetic operations on date components. `:normalise ( )` can be
+14) to facilit ate arithmetic operations on date components. `:normalise ( )` can be
called to modify components to return to their standard range.
Equality and comparisons should work between timetable objects.
called to modify components to return to their standard range.
Equality and comparisons should work between timetable objects.
-## `new ( year , month , day , hour , min , sec , [yday] , [wday] )`
+### `new ( year , month , day , hour , min , sec , [yday] , [wday] )`
Returns a new timetable with the given contents.
Returns a new timetable with the given contents.
-## `new_from_timestamp ( timestamp )`
+### `new_from_timestamp ( timestamp )`
-Returns a new timetable given a timestamp in seconds since the unix epoch of
+Returns a new (normalised) timetable, given a timestamp in seconds since the unix epoch of
-`:normalise ( )` should probably be called before use to resolve to the current time and
-date.
+Returns a new independent instance of an existing timetable object.
-Returns a new independant instance of an existing timetable object.
-## `:normalise ( )`
-
-Mutates the current object's time and date components so that they lie within 'normal'
+Mutates the current object's time and date components so that are integers within 'normal'
ranges e.g. `month` is `1`-`12`; `min` is `0`-`59`
ranges e.g. `month` is `1`-`12`; `min` is `0`-`59`
+First, fractional parts are propagated down.
+e.g. `.month=6.5` `.day=1` (which could be read as "the first day after the middle of June")
+normalises to `.month=2` `.day=16`
+
+Second, any fields outside of their normal ranges are propagated up
+e.g. `.hour=10` `.min=100` (100 minutes past 10am)
+normalises to `.hour=11` `.min=40`
+
-## `:rfc_3339 ( )` and `__tostring` metamethod
+### `:rfc_3339 ( )` and `__tostring` metamethod
Returns the timetable formatted as an rfc-3339 style string.
The timezone offset (or Z) is not appended.
Returns the timetable formatted as an rfc-3339 style string.
The timezone offset (or Z) is not appended.
-The ranges of components are not checked, and if you want a valid timestamp, `:normalise
-( )` should be called first.
+The ranges of components are not checked, if you want a valid timestamp,
+`:normalise ( )` should be called first.
-Returns the timetable as the number of seconds since unix epoch (1970-01-01) as a lua
-number.
+Returns the timetable as the number of seconds since unix epoch (1970-01-01) as a lua number.
Unpacks the timetable object; returns `year`, `month`, `day`, `hour`, `min`, `sec`, `yday`, `wday`
Unpacks the timetable object; returns `year`, `month`, `day`, `hour`, `min`, `sec`, `yday`, `wday`
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