From: Ne Scripter <stuart.clarke@...>
Date: 2009-09-07T20:43:19+09:00
Subject: Re: Date & time validation

Thanks all for the responses. I am still hitting a bit of a block with 
this, initially I want to check if a date matches this criteria, then if 
not do some of the processes that have been suggested.

I need to say
if date = yyyy/mm/dd
puts date
else
validate date
end

How would I do this? Sorry for so many questions, I am struggling to get 
my head around the date libraries

Many thanks


Robert Klemme wrote:
> 2009/9/1 Brian Candler <b.candler@pobox.com>:
>> Max Williams wrote:
>>> date = (string =~ /^\d{4}\/\d{2}\/\d{2}$/) &&
>>
>> Beware: use
>>
>> date = (string =~ /\A\d{4}\/\d{2}\/\d{2}\z/) ...
>>
>> or else malicious inputs may be able to bypass your validation. (They
>> might not be able to bypass Date.strptime in this particular instance,
>> but still you ought to validate correctly)
> 
> Then you can do:
> 
> 16:48:53 ~$ irb19 -r date
> Ruby version 1.9.1
> irb(main):001:0> %w{2009/10/11 2009/10/44}.each do |s|
> irb(main):002:1* p s
> irb(main):003:1> date = %r{\A(\d{4})/(\d{2})/(\d{2})\z} =~ s &&
> Date.new($1.to_i, $2.to_i, $3.to_i)
> irb(main):004:1> end
> "2009/10/11"
> "2009/10/44"
> ArgumentError: invalid date
>         from /opt/lib/ruby19/1.9.1/date.rb:809:in `civil'
>         from (irb):6:in `block in irb_binding'
>         from (irb):4:in `each'
>         from (irb):4
>         from /opt/bin/irb19:12:in `<main>'
> irb(main):005:0>
> 
> Cheers
> 
> robert

-- 
Posted via http://www.ruby-forum.com/.