user2993178 user2993178 - 1 year ago 72
Ruby Question

How can verify if a date is in the format dd mon ' yy in Ruby?

I have a column full of dates in the format dd mon 'yy (Ex: 20 Jan '16).
How can i verify that each date value in the column has this same format in Ruby?


Answer Source

You can use Date.strptime which fails with an exception when it cannot parse the date:

require 'date'

Date.strptime("20 Jan '16", "%d %b '%y")
#=> <Date: 2016-01-20 ((2457408j,0s,0n),+0s,2299161j)>

Date.strptime("31 Feb '16", "%d %b '%y")
#=> ArgumentError: invalid date
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