Javascript Pattern How To

muklee · September 15th, 2006, 08:46 AM

I have construct a pattern to compare a string. But it is a bit long and I wonder is it a way to simplify my statement below:

Code:

// var format = 'xx/dd/yyyy'; // This will get alert 'False'
var format = 'mm/dd/yyyy'; // This will get alert 'True'

if (regExp.compile('dd', 'i').test(format) || 
    regExp.compile('mm', 'i').test(format) || 
    regExp.compile('yyyy', 'i').test(format)) {

    alert('>>>>>>>>>>> True');
} else {
    alert('>>>>>>>>>>> False');
}

Thank you for any advice.

joefawcett · September 15th, 2006, 08:51 AM

Do you mean it must contain the three strings "mm", "dd" and "yyyy" in any order and with anything else, e.g. "ddddddddddmmmmmmmmmmmmmyyyyyyyyyyyyyyy"?

--

Joe (Microsoft MVP - XML)

joefawcett · September 15th, 2006, 08:52 AM

Do you mean it must contain the three strings "mm", "dd" and "yyyy" in any order and with anything else, e.g. "dd123mmy456yyyy!Â£$%"?

--

Joe (Microsoft MVP - XML)

muklee · September 15th, 2006, 09:11 AM

Yes, the string must contain pattern 'dd', 'mm' and 'yyyy' in any order, for instance, 'dd/mm/yyyy'or 'mm/dd/yyyy or 'yyyy-mm-dd', which means value 'ddddddddddmmmmmmmmmmmmmyyyyyyyyyyyyyyy' should throw false.

I think my statement will give 'True' by using value 'ddddddddddmmmmmmmmmmmmmyyyyyyyyyyyyyyy', which is not correct. It would be great, if your or anyone, could help to corect my logic.

Actually I have another problem which I don't know how to solve it by using pattern. It will be easier for us to understand by using a pseudocode expression:

Code:

var format = 'dd/mm/yyyy';

// pseudocode
if (format contains 2 '/' charaters)
   return true;
else // case if contains more/less than 2 or contains no '/' character
   return false;

Thanks in advance.