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Regexp problem Posted by vinay_techie4u (vinay_techie4u), 5 May 2006 Hii 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 2006 You 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 2006 Thanx 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.. Thanx Vinay Posted by admin (Graham Ellis), 5 May 2006 Trying 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.How can you learn Tcl? Well ... as a trainer who teaches Tcl courses I have to recommend our Tcl course, now don't I? This page is a thread posted to the opentalk forum
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