ruby - How can I make the days of the month be printed according to each day (ex: Su Mo Tu We...etc)? -
i have big string numbers 1-31. , how able center name of month?
my code:
class month attr_reader :month, :year def initialize( month, year) @month = month @year = year end def month_names names_of_months = {1 => 'january', 2 => 'february', 3 => 'march', 4 => 'april', 5 => 'may', 6 => 'june', 7 => 'july', 8 => 'august', 9 => 'september', 10 => 'october', 11 => 'november', 12 => 'december'} return names_of_months[@month] end def length days_of_months = {1 => 31, 2 => 28, 3 => 31, 4 => 30, 5 => 31, 6 => 30, 7 => 31, 8 => 31, 9 => 30, 10 => 31, 11 => 30, 12 => 31} return days_of_months[@month] end def to_s output = "#{month_names} #{year}\nsu mo tu th fr sa\n" (1..length).each |day| output << day.to_s end output end end terminal status:
failure: testmonth#test_to_s_on_jan_2017 [test/test_month.rb:39] minitest::assertion: --- expected +++ actual @@ -1,9 +1,3 @@ -"january 2017 +"january 2017 su mo tu th fr sa - 1 2 3 4 5 6 7 - 8 9 10 11 12 13 14 -15 16 17 18 19 20 21 -22 23 24 25 26 27 28 -29 30 31 - -" +12345678910111213141516171819202122232425262728293031"
the string class in ruby has center method:
weekdays = "su mo tu th fr sa" month = "#{month_names} #{year}" output = [ month.center(weekdays.size), weekdays ].join("\n") puts output # april 2015 # su mo tu th fr sa the following not answer question. complete rewrite of code, because bored:
require 'date' class month attr_reader :month, :year def initialize(month, year) @month = month @year = year end def first_of_month date.new(year, month, 1) end def last_of_month date.new(year, month, -1) end def month_name last_of_month.strftime('%b') end def days_in_month last_of_month.day end def to_s [].tap |out| out << header out << weekdays grouped_days.each |days| out << days.map { |day| day.to_s.rjust(2) }.join(' ') end end.join("\n") end private def header "#{month_name} #{year}".center(weekdays.size) end def weekdays 'su mo tu th fr sa' end def grouped_days days = (1..days_in_month).to_a first_of_month.wday.times { days.unshift(nil) } days.each_slice(7) end end month.new(4, 2015).to_s # april 2015 # su mo tu th fr sa # 1 2 3 4 # 5 6 7 8 9 10 11 # 12 13 14 15 16 17 18 # 19 20 21 22 23 24 25 # 26 27 28 29 30 