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Re: REgular expression to check the string that allows "a","b" and "c" to occur only once in any order.by oha (Friar) |
| on Dec 11, 2007 at 10:12 UTC ( [id://656363]=note: print w/replies, xml ) | Need Help?? |
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the RE above checks if one of [abc] is repeated if you want to declare "abcz" wrong too, just: which also check if a bad char is present. Oha
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