‘ordinalize’ in Ruby On Rails

Print numbers as Cardinals in Ruby On Rails (like 1st, 2nd, 3rd, 4th and so on….)

Rails has inbuilt function – ordinalize

(1).ordinalize => "1st"
(13).ordinalize => "13th"
(22).ordinalize => "22nd"
(100).ordinalize => "100th"

Also we can write the helper as following,

def number_to_ordinal(num)
num = num.to_i
if (10...20)===num
"#{num}th"
else
g = %w{ th st nd rd th th th th th th }
a = num.to_s
c=a[-1..-1].to_i
a + g[c]
end
end

number_to_ordinal(23) => "23rd"
number_to_ordinal(1) => "1st"