Cldr.Calendar.Interval (Cldr Calendars v1.13.0) View Source

Implements functions to return intervals and compare date intervals.

In particular it provides functions which return an interval (as a Date.Range.t) for years, quarters, months, weeks and days.

In general, the intervals created with the packaage calendar_interval are to be preferred since they can used over different time precisions whereas the functions in this module are all intervals of a day. In order to be used with ex_cldr_calendars, version "~> 0.2" of calendar_interval is required.

Note however that as of release 0.2, calendar_interval does not support intervals of quarters or weeks.

Link to this section Summary

Functions

compare(r1, r2)

Compare two date ranges.

day(date)

Returns a Date.Range.t that represents the day.

day(year, day, calendar \\ Cldr.Calendar.Gregorian)

month(date)

Returns a Date.Range.t that represents the year.

month(year, month, calendar \\ Cldr.Calendar.Gregorian)

quarter(date)

Returns a Date.Range.t that represents the quarter.

quarter(year, quarter, calendar \\ Cldr.Calendar.Gregorian)

week(date)

Returns a Date.Range.t that represents the year.

week(year, week, calendar \\ Cldr.Calendar.Gregorian)

year(date)

Returns a Date.Range.t that represents the year.

year(year, calendar \\ Cldr.Calendar.Gregorian)

Link to this section Functions

compare(r1, r2)

Specs

compare(range_1 :: Date.Range.t(), range_2 :: Date.Range.t()) ::
  Cldr.Calendar.interval_relation()

Compare two date ranges.

Uses Allen's Interval Algebra to return one of 13 different relationships:

Relation	Converse
:precedes	:preceded_by
:meets	:met_by
:overlaps	:overlapped_by
:finished_by	:finishes
:contains	:during
:starts	:started_by
:equals	:equals

Arguments

range_1 is a Date.Range.t
range_2 is a Date.Range.t

Returns

An atom representing the relationship between the two ranges.

Examples

iex> Cldr.Calendar.Interval.compare Cldr.Calendar.Interval.day(~D[2019-01-01]),
...> Cldr.Calendar.Interval.day(~D[2019-01-02])
:meets

iex> Cldr.Calendar.Interval.compare Cldr.Calendar.Interval.day(~D[2019-01-01]),
...> Cldr.Calendar.Interval.day(~D[2019-01-03])
:precedes

iex> Cldr.Calendar.Interval.compare Cldr.Calendar.Interval.day(~D[2019-01-03]),
...> Cldr.Calendar.Interval.day(~D[2019-01-01])
:preceded_by

iex> Cldr.Calendar.Interval.compare Cldr.Calendar.Interval.day(~D[2019-01-02]),
...> Cldr.Calendar.Interval.day(~D[2019-01-01])
:met_by

iex> Cldr.Calendar.Interval.compare Cldr.Calendar.Interval.day(~D[2019-01-02]),
...> Cldr.Calendar.Interval.day(~D[2019-01-02])
:equals

day(date)

Specs

day(Date.t()) :: Date.Range.t()

Returns a Date.Range.t that represents the day.

The range is enumerable.

Arguments

year is any year for calendar
day is any day in the year for calendar
calendar is any module that implements the Calendar and Cldr.Calendar behaviours. The default is Cldr.Calendar.Gregorian.

Returns

A Date.Range.t() representing the the enumerable days in the week

Examples

iex> Cldr.Calendar.Interval.day 2019, 52, Cldr.Calendar.Fiscal.US
#DateRange<~D[2019-02-21 Cldr.Calendar.Fiscal.US], ~D[2019-02-21 Cldr.Calendar.Fiscal.US]>

iex> Cldr.Calendar.Interval.day 2019, 92, Cldr.Calendar.NRF
#DateRange<~D[2019-W14-1 Cldr.Calendar.NRF], ~D[2019-W14-1 Cldr.Calendar.NRF]>

Cldr.Calendar.Interval.day 2019, 8, Cldr.Calendar.ISOWeek
#DateRange<%Date{calendar: Cldr.Calendar.ISOWeek, day: 1, month: 2, year: 2019}, %Date{calendar: Cldr.Calendar.ISOWeek, day: 1, month: 2, year: 2019}>

day(year, day, calendar \\ Cldr.Calendar.Gregorian)

Specs

day(Calendar.year(), Calendar.day(), Cldr.Calendar.calendar()) :: Date.Range.t()

month(date)

Specs

month(Date.t()) :: Date.Range.t()

Returns a Date.Range.t that represents the year.

The range is enumerable.

Arguments

year is any year for calendar
month is any month in the year for calendar
calendar is any module that implements the Calendar and Cldr.Calendar behaviours. The default is Cldr.Calendar.Gregorian.

Returns

A Date.Range.t() representing the the enumerable days in the month

Examples

iex> Cldr.Calendar.Interval.month 2019, 3, Cldr.Calendar.Fiscal.UK
#DateRange<~D[2019-03-01 Cldr.Calendar.Fiscal.UK], ~D[2019-03-30 Cldr.Calendar.Fiscal.UK]>

iex> Cldr.Calendar.Interval.month 2019, 3, Cldr.Calendar.Fiscal.US
#DateRange<~D[2019-03-01 Cldr.Calendar.Fiscal.US], ~D[2019-03-31 Cldr.Calendar.Fiscal.US]>

month(year, month, calendar \\ Cldr.Calendar.Gregorian)

Specs

month(Calendar.year(), Calendar.month(), Cldr.Calendar.calendar()) ::
  Date.Range.t()

quarter(date)

Specs

quarter(Date.t()) :: Date.Range.t()

Returns a Date.Range.t that represents the quarter.

The range is enumerable.

Arguments

year is any year for calendar
quarter is any quarter in the year for calendar
calendar is any module that implements the Calendar and Cldr.Calendar behaviours. The default is Cldr.Calendar.Gregorian.

Returns

A Date.Range.t() representing the the enumerable days in the quarter

Examples

iex> Cldr.Calendar.Interval.quarter 2019, 2, Cldr.Calendar.Fiscal.UK
#DateRange<~D[2019-04-01 Cldr.Calendar.Fiscal.UK], ~D[2019-06-30 Cldr.Calendar.Fiscal.UK]>

iex> Cldr.Calendar.Interval.quarter 2019, 2, Cldr.Calendar.ISOWeek
#DateRange<~D[2019-W14-1 Cldr.Calendar.ISOWeek], ~D[2019-W26-7 Cldr.Calendar.ISOWeek]>

quarter(year, quarter, calendar \\ Cldr.Calendar.Gregorian)

Specs

quarter(Calendar.year(), Cldr.Calendar.quarter(), Cldr.Calendar.calendar()) ::
  Date.Range.t()

week(date)

Specs

week(Date.t()) :: Date.Range.t()

Returns a Date.Range.t that represents the year.

The range is enumerable.

Arguments

year is any year for calendar
week is any week in the year for calendar
calendar is any module that implements the Calendar and Cldr.Calendar behaviours. The default is Cldr.Calendar.Gregorian.

Returns

A Date.Range.t() representing the the enumerable days in the week or
{:error, :not_defined} if the calendar does not support the concept of weeks

Examples

iex> Cldr.Calendar.Interval.week 2019, 52, Cldr.Calendar.Fiscal.US
#DateRange<~D[2019-12-22 Cldr.Calendar.Fiscal.US], ~D[2019-12-28 Cldr.Calendar.Fiscal.US]>

iex> Cldr.Calendar.Interval.week 2019, 52, Cldr.Calendar.NRF
#DateRange<~D[2019-W52-1 Cldr.Calendar.NRF], ~D[2019-W52-7 Cldr.Calendar.NRF]>

iex> Cldr.Calendar.Interval.week 2019, 52, Cldr.Calendar.ISOWeek
#DateRange<~D[2019-W52-1 Cldr.Calendar.ISOWeek], ~D[2019-W52-7 Cldr.Calendar.ISOWeek]>

iex> Cldr.Calendar.Interval.week 2019, 52, Cldr.Calendar.Julian
{:error, :not_defined}

week(year, week, calendar \\ Cldr.Calendar.Gregorian)

Specs

week(Calendar.year(), Cldr.Calendar.week(), Cldr.Calendar.calendar()) ::
  Date.Range.t()

year(date)

Specs

year(Date.t()) :: Date.Range.t()

Returns a Date.Range.t that represents the year.

The range is enumerable.

Arguments

year is any year for calendar
calendar is any module that implements the Calendar and Cldr.Calendar behaviours. The default is Cldr.Calendar.Gregorian.

Returns

A Date.Range.t() representing the the enumerable days in the year

Examples

iex> Cldr.Calendar.Interval.year 2019, Cldr.Calendar.Fiscal.UK
#DateRange<~D[2019-01-01 Cldr.Calendar.Fiscal.UK], ~D[2019-12-31 Cldr.Calendar.Fiscal.UK]>

iex> Cldr.Calendar.Interval.year 2019, Cldr.Calendar.NRF
#DateRange<~D[2019-W01-1 Cldr.Calendar.NRF], ~D[2019-W52-7 Cldr.Calendar.NRF]>

year(year, calendar \\ Cldr.Calendar.Gregorian)

Specs

year(Calendar.year(), Cldr.Calendar.calendar()) :: Date.Range.t()