Quelle Heure Est-Il?

Difficulty:
Easy

Tags:
dates, strings

Instructions:

Write a function to parse some dates and return a standard format. Hint: the help page might be of use.

Problem and Solution:

	# Solution to 'Quelle Heure Est-Il?' on rubeque.com
	# by jakthegr8
	# http://www.rubeque.com/problems/quelle-heure-est-il-ques-
	def pretty_date(date)
	months = ["January","February","March","April","May","June","July","August","Sepetember","October","November","December"]
	mon_to_mon3 = {}
	mon_nbr_to_mon3 = {}
	months.each_with_index {|m,i| mon_to_mon3[m] = m[0...3]; mon_nbr_to_mon3[i+1] = mon_to_mon3[m]}
	case date
	when /^\d*\d-\d*\d-\d{4}/ # mm-dd-yyyy
	a = date.split('-')
	"" << mon_nbr_to_mon3[a[0].to_i] << " " << a[1] << ", " << a[2]
	when /^[a-zA-Z]+ \d*\d, \d{4}/ # MONTH dd, yyyy
	a = date.split
	mon_to_mon3[a[0]] << " " << a[1] << " " << a[2]
	when /^\d{4}-\d*\d-\d*\d/ # yyyy-mm-dd
	a = date.split('-')
	mon_nbr_to_mon3[a[1].to_i] << " " << a[2] << ", " << a[0]
	when /^\d*\d\/\d*\d\/\d{4}/ # mm/dd/dddd
	a = date.split(/\//)
	mon_nbr_to_mon3[a[0].to_i] << " " << a[1] << ", " << a[2]
	else
	puts "no match"
	end
	end
	assert_equal pretty_date("11-30-1835"), "Nov 30, 1835"
	assert_equal pretty_date("July 20, 1933"), "Jul 20, 1933"
	assert_equal pretty_date("1922-11-11"), "Nov 11, 1922"
	assert_equal pretty_date("9/20/1978"), "Sep 20, 1978"

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