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+## `luatz.timetable` <!-- --> {#timetable}
Provides an class to represent a time and date.
Objects have no concept of timezone or utc offset.
Provides an class to represent a time and date.
Objects have no concept of timezone or utc offset.
- `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 facilitate arithmetic operations on date components. `:normalise ( )` can be
+14) to facilitate 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]])` <!-- --> {#timetable.new}
Returns a new timetable with the given contents.
Returns a new timetable with the given contents.
-### `new_from_timestamp ( timestamp )`
+### `new_from_timestamp(timestamp)` <!-- --> {#timetable.new_from_timestamp}
Returns a new (normalised) timetable, given a timestamp in seconds since the unix epoch of
1970-01-01.
Returns a new (normalised) timetable, given a timestamp in seconds since the unix epoch of
1970-01-01.
+### `timetable:clone()` <!-- --> {#timetable:clone}
Returns a new independent instance of an existing timetable object.
Returns a new independent instance of an existing timetable object.
+### `timetable:normalise()` <!-- --> {#timetable: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`
-### `:rfc_3339 ( )` and `__tostring` metamethod
+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`
+
+
+### `timetable:rfc_3339()` <!-- --> {#timetable:rfc_3339}
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, if you want a valid timestamp,
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, if you want a valid timestamp,
-`:normalise ( )` should be called first.
+[`:normalise()`](#timetable:normalise) should be called first.
+
+This function is also the `__tostring` metamethod for timetable objects
+### `timetable:timestamp()` <!-- --> {#timetable:timestamp}
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.
+### `timetable:unpack()` <!-- --> {#timetable:unpack}
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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