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Check a text - is it a date?

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Jeff Gray

Nov 15, 2010; 6:26am

Check a text - is it a date?

How do I check a text for holding a date value?
isNumber is handy for numbers. Is there anything like that?

The scenario I'm looking at is making sure a value in a Seaside control has been entered correctly.

NorbertHartl

Nov 15, 2010; 8:31am

Re: Check a text - is it a date?

On 15.11.2010, at 07:26, Jeff Gray wrote:

How do I check a text for holding a date value?
isNumber is handy for numbers. Is there anything like that?

No, there isn't as far as I know. Checking isNumber is rather easy because you can decide it by looking at a single character. A format like date you have to parse.

The scenario I'm looking at is making sure a value in a Seaside control has
been entered correctly.

You can try to parse the date

| date |

[ date := DateAndTime fromString: aMightBeADate ]

on: Error

do: [ :err | ].

After that your date test is isNil. Either you get the parsed date or it is nil if it couldn't parse a date.

Norbert

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Daniel Klein

Nov 15, 2010; 4:32pm

Re: Check a text - is it a date?

In reply to this post by Jeff Gray

| amIaDate |
[amIaDate asDate]
on: Exception
do: [:ex | Transcript show: 'That''s not a date, you fool!']

Dan

-----Original Message-----
From: [hidden email]
[mailto:[hidden email]] On Behalf Of Jeff Gray
Sent: Monday, November 15, 2010 1:26
To: [hidden email]
Subject: [Pharo-users] Check a text - is it a date?

How do I check a text for holding a date value?
isNumber is handy for numbers. Is there anything like that?

The scenario I'm looking at is making sure a value in a Seaside control has
been entered correctly.

--
View this message in context:
http://forum.world.st/Check-a-text-is-it-a-date-tp3042556p3042556.html
Sent from the Pharo Smalltalk Users mailing list archive at Nabble.com.

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Daniel Klein

Nov 15, 2010; 4:35pm

Re: Check a text - is it a date?

In reply to this post by Jeff Gray

Oops, missed a line :-(

| amIaDate |
amIaDate := '30 Feb 2010'.
[amIaDate asDate]
on: Exception
do: [:ex | Transcript show: 'That''s not a date, you fool!']

Dan

-----Original Message-----
From: [hidden email]
[mailto:[hidden email]] On Behalf Of Jeff Gray
Sent: Monday, November 15, 2010 1:26
To: [hidden email]
Subject: [Pharo-users] Check a text - is it a date?

How do I check a text for holding a date value?
isNumber is handy for numbers. Is there anything like that?

The scenario I'm looking at is making sure a value in a Seaside control has
been entered correctly.

--
View this message in context:
http://forum.world.st/Check-a-text-is-it-a-date-tp3042556p3042556.html
Sent from the Pharo Smalltalk Users mailing list archive at Nabble.com.

_______________________________________________
Pharo-users mailing list
[hidden email]
http://lists.gforge.inria.fr/cgi-bin/mailman/listinfo/pharo-users

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