How to test a String if it is a valid date?

Greetings,

I want to test a String to see if it can be a Date using mm/dd/yyyy format.  I want something that won’t cause a walkback window.  Is there a String method isValidAsADate?

Sincerely,

Joe.



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On 29 Mar 2016 at 19:07, Joseph Alotta wrote:

You might have a method like this:

isDate: aString
        "Answer whether aString is in the form 'mm/dd/yyyy' "
        | w x |
        w := aString asString select: [:a | a isDigit or: a = $/].
        x := w findTokens: '/'.
        ^ x size = 3 and: [w  = aString]


This is the general idea. Let me know if you have any questions.

 - Dan
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Hi Joe,

You could just handle the error.

['1/22/2016' asDate class = Date ] on: Error do: [:ex | ^false]
returns true

['15/22/2016' asDate class = Date ] on: Error do: [:ex | ^false]
returns false

Or even

[myDate := '1/22/2016' asDate] on: Error do: [:ex | ^nil].

Then you can just check if myDate isNil.

All the best,

Ron Teitelbaum
Head Of Engineering
3D Immersive Collaboration Consulting
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