
r0xx0rz
New User
Jan 10, 2005, 9:57 PM
Post #1 of 6
(9704 views)
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Testing for duplicate or invalid input
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I am trying to check an equation for errors. Specifically, I need to test for duplicate input of operators (+,-,x,/,sqrt,exp) or an operator followed by =. Is it possible to do this using a regex? I have no idea how to begin. Any help would be greatly appreciated.
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