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Contents
require 'date' # needed for 1.9.1
module ICU
class Util
=begin rdoc
== Parsing dates
The method _parsedate!_ parses strings into date objects, interpreting nn/nn/nnnn as dd/mm/yyyy. It raises an exception on error.
Util.parsedate!('1955-11-09') # => Date (1955-11-09)
Util.parsedate!('02/03/2009') # => Date (2009-03-02)
Util.parsedate!('02/23/2009') # => Date (2009-02-23)
Util.parsedate!('16th June 1986') # => Date (1986-06-16)
Util.parsedate!('not a date') # exception raised
Note that the parse method of the Date class behaves differently in Ruby 1.8.7 and 1.9.1.
In 1.8.7 it assumes American dates and will raise ArgumentError on "30/03/2003".
In 1.9.1 it assumes European dates and will raise ArgumentError on "03/30/2003".
== Diffing dates
The method _age_ returns the difference of two dates:
Util.age(born, date) # age in years at the given date (Float)
Util.age(born) # age in years now (today)
Internally it uses _parsedate!_ so can throw a exception if an invalid date is supplied.
=end
def self.parsedate!(date)
return date.clone if date.is_a?(Date)
string = date.to_s.strip
raise "invalid date (#{date})" unless string.match(/[1-9]/)
string = [$3].concat($2.to_i > 12 ? [$1, $2] : [$2, $1]).join('-') if string.match(/^(\d{1,2}).(\d{1,2}).(\d{4})$/)
begin
Date.parse(string, true)
rescue
raise "invalid date (#{date})"
end
end
def self.age(born, date=Date.today)
born = parsedate!(born)
date = parsedate!(date)
date.year - born.year + (date.yday - born.yday) / 366.0
end
end
end
Version data entries
7 entries across 7 versions & 1 rubygems