Overview

edate is an erlang date manipulation library

Installation

git clone git://github.com/dweldon/edate.git
cd edate && make

Functions

• today/0
• tomorrow/0
• yesterday/0
• shift/2
• shift/3
• beginning_of_month/1
• end_of_month/1
• date_to_string/1
• string_to_date/1
• day_of_week/1

Function Descriptions

today() -> Date

returns today's date.

tomorrow() -> Date

returns tomorrow's date.

yesterday() -> Date

returns yesterday's date.

shift(N, Period) -> Date

returns a new date after shifting today's date by N periods. N is an integer, Period is day | days | week | weeks | month | months | year | years

shift(StartDate, N, Period) -> Date

returns a new date after shifting StartDate by N periods. N is an integer, Period is day | days | week | weeks | month | months | year | years > edate:shift({2000,1,1}, -2, days). {1999,12,30} > edate:shift({2000,1,1}, 1, week). {2000,1,8} > edate:shift({2000,1,1}, 4, months). {2000,5,1} > edate:shift({2000,1,1}, 2, years). {2002,1,1}

beginning_of_month(StartDate) -> Date

returns a new date representing the beginning of the month containing StartDate. > edate:beginning_of_month({2010,2,15}). {2010,2,1} > edate:beginning_of_month(edate:shift({2010,7,2}, -1, month)). {2010,6,1}

end_of_month(StartDate) -> Date

returns a new date representing the end of the month containing StartDate. > edate:end_of_month({2010,2,15}). {2010,2,28} > edate:end_of_month(edate:shift({2010,7,2}, -1, month)). {2010,6,30}

date_to_string(Date) -> String

returns an ISO 8601 representation of Date. > edate:date_to_string({1976,3,18}). "1976-03-18"

string_to_date(String) -> Date

returns a date representation of String. the following formats are valid (with or without zero-padding): YYYY-MM-DD, YYYY/MM/DD, MM-DD-YYYY, MM/DD/YYYY. > edate:string_to_date("1976-03-18"). {1976,3,18} > edate:string_to_date("3/18/1976"). {1976,3,18}

day_of_week(Date) -> String

returns the day of the week as a string ("monday".."sunday"). > edate:day_of_week({2010,7,4}). "sunday"