概要

Ruby の Array#abbrev で略称を生成し、最小の入力で曜日を取得します

Abbrev modue, Array#abbrev

Abbrev.abbrev(array)
もしくは
Array#abbrev
で、配列の短縮形を取得します。

サンプル

仕様

曜日を最小入力で取得できるようにします。

コード

require 'abbrev'
require 'pp'

weeks = %w(Sunday Monday Tuesday Wednesday Thursday Friday Saturday)
abbrev_week = weeks.abbrev
pp abbrev_week, "\n"
print Abbrev.abbrev(weeks) == abbrev_week
puts
%w(S Su Sa T Tu Th F).each do |key|
  week = abbrev_week[key]
  print "input #{key} : key = "
  puts week.nil? ? 'not exist' : week
end

動作確認

{"Sunday"=>"Sunday",
 "Sunda"=>"Sunday",
 "Sund"=>"Sunday",
 "Sun"=>"Sunday",
 "Su"=>"Sunday",
 "Monday"=>"Monday",
 "Monda"=>"Monday",
 "Mond"=>"Monday",
 "Mon"=>"Monday",
 "Mo"=>"Monday",
 "M"=>"Monday",
 "Tuesday"=>"Tuesday",
 "Tuesda"=>"Tuesday",
 "Tuesd"=>"Tuesday",
 "Tues"=>"Tuesday",
 "Tue"=>"Tuesday",
 "Tu"=>"Tuesday",
 "Wednesday"=>"Wednesday",
 "Wednesda"=>"Wednesday",
 "Wednesd"=>"Wednesday",
 "Wednes"=>"Wednesday",
 "Wedne"=>"Wednesday",
 "Wedn"=>"Wednesday",
 "Wed"=>"Wednesday",
 "We"=>"Wednesday",
 "W"=>"Wednesday",
 "Thursday"=>"Thursday",
 "Thursda"=>"Thursday",
 "Thursd"=>"Thursday",
 "Thurs"=>"Thursday",
 "Thur"=>"Thursday",
 "Thu"=>"Thursday",
 "Th"=>"Thursday",
 "Friday"=>"Friday",
 "Frida"=>"Friday",
 "Frid"=>"Friday",
 "Fri"=>"Friday",
 "Fr"=>"Friday",
 "F"=>"Friday",
 "Saturday"=>"Saturday",
 "Saturda"=>"Saturday",
 "Saturd"=>"Saturday",
 "Satur"=>"Saturday",
 "Satu"=>"Saturday",
 "Sat"=>"Saturday",
 "Sa"=>"Saturday"}
"\n"
true
input S : key = not exist
input Su : key = Sunday
input Sa : key = Saturday
input T : key = not exist
input Tu : key = Tuesday
input Th : key = Thursday
input F : key = Friday