Posted by vinay_techie4u (vinay_techie4u), 5 May 2006Hii Evrybody..
M new to TCL , only 1 week..
Can U plz tell me the single Regexp for valid IP address.
thanx in advance
Posted by admin (Graham Ellis), 5 May 2006You cannot easily check for a valid IP address in a single regular expression; regular expressions are great for character handling but they get a bit trickier when it comes to checking number ranges.
As an alternative, you should:
a) Check the basic structure of the address (1 to 3 digits, dot, 1 to 3 digits, dot, 1 to 3 digits, dot, one to three digits) using a regular expression
b) Split the string that you're checking at the "." charcater and check each 4 elements of the resulting list to ensure that it's in the range 0 to 255.
You can extent this is you wish to check that you have the real address of a computer rather than a broadcast address by adding extra tests.
Posted by vinay_techie4u (vinay_techie4u), 5 May 2006Thanx Graham..
yeh..I had already implemented in the same way as you said..
But one of mine frnd. wants it to be in a single regexp
anyways thanx a lot for your quick responce.
also plz suggest me what should I do, to have gud
understading of TCL as m new to programming ..just
now shifted from QA to Devlopment.
Your suggestion will help me in getting on right track..
Posted by admin (Graham Ellis), 5 May 2006Trying to do everything in a single regular expression is a bit "macho" - people try to do it but they end up looking a bit silly when they overstretch.
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