NEWS: Add NEWS file

[etc/awesome.git] / doc / timetable.md

diff --git a/doc/timetable.md b/doc/timetable.md
index 86ce2b2dba0192699186e404ac37a8a7aabfbc32..812da43c711e4ab9b272cdc770e085efeefbbec6 100644 (file)
--- a/doc/timetable.md
+++ b/doc/timetable.md
@@ -1,4 +1,4 @@
-# `luatz.timetable`
+## `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.


@@ -15,51 +15,57 @@ The fields are intentionally compatible with the lua standard library's `os.date
   - `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 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 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 

 1970-01-01.
 
 1970-01-01.
 

-`:normalise ( )` should probably be called before use to resolve to the current time and 
-date.

 
 

+### `timetable:clone()` <!-- --> {#timetable:clone}

 
 

-## `:clone ( )`
+Returns a new independent instance of an existing timetable object.

 
 

-Returns a new independant instance of an existing timetable object.

 
 

+### `timetable:normalise()` <!-- --> {#timetable:normalise}

 
 

-## `: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
+
+### `timetable:rfc_3339()` <!-- --> {#timetable:rfc_3339}

 
 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()`](#timetable:normalise) should be called first.
+
+This function is also the `__tostring` metamethod for timetable objects

 
 
 
 

-## `:timestamp ( )`
+### `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.

 
 
 
 

-## `:unpack ( )`
+### `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`