Can there be a Regex : "First two character should not be same in a string" -


can there such regex?

first 2 characters should not same in string.

for engines supporting look-ahead (which case in languages), can use this:

^(.)(?!\1)

it captures first character , checks next character not same character, negative look-ahead , backreference \1.

though juhana stated in comment, should consider using normal string operations check, unless regex option available.


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