exclude underscore from alpha numeric regex

Question

I want use \w regex for to allow alpha numeric but I don't want underscore _ to be part of it. Since _ is included in \w. So I have coded like this but doesn't work, what is my mistake?

(/^roger\w{2,3}[0-9a-z]/i)

I am expecting any character other than A-Z or 1-2 to be exclude

ex - roger3_2 or roger46_ or roger2_

but

roger54 or roger4a or roger455 or rogerAAA

are to be ok

Answer 1

You could try something like:

[^_\W]+

Answer 2

• A numeric code point is \pN or \p{Number}.
• A digit code point is \d, \p{digit}, \p{Nd}, \p{Decimal_Number}, or \p{Numeric_Type=Decimal}.
• An alphabetic code point is \p{alpha} or \p{Alphabetic}. It includes all \p{Digit}, \p{Letter}, and \p{Letter_Number} code points, as well as certain \p{Mark} and \p{Symbol} code points.
• A programming-word code point is \w, or [\p{Alphabetic}\p{Digit}\p{Mark}\p{Connector_Punctuation}].

An alphanumeric code point by the strictest definition is consequently and necessarily [\p{Alphabetic}\p{Number}], typically abbreviated [\p{alpha}\pN].