Ruby: How to use regex to see if string is in date format with dashes? -


i want see if string passed in yyyy-mm-dd format. 

string = "2013-03-02" string[/\d{4}-\d{2}-\d{4}/] #why return nil?

i want check there 4 digits, followed dash, followed 2 digits, followed dash, followed 2 digits.

\d{4}-\d{2}-\d{4} should \d{4}-\d{2}-\d{2} per wish.

(arup~>~)$ pry --simple-prompt >> string = "2013-03-02" => "2013-03-02" >> string[/\d{4}-\d{2}-\d{2}/] => "2013-03-02" >> string = "2013-03-2" => "2013-03-2" >> string[/\d{4}-\d{2}-\d{2}/] => nil

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