^[_a-zA-Z0-9]+$ how to make regex username with underscore. i'm using c# but this regex isn't working.

This can be used to find all zone files that contain authoritative nameservers - e.g. perl -ne 'print if /^([\w.]+\.)\s+.+\sNS\s.+\1/' /var/named/*.db | awk '{print $1}' | sort | uniq

Matches the Content-Range response header format -[end]/[total|*]

Matches any telephone number with region parentesis, or separated by points or dash or spaces

Detect various possible HTML linebreak tags (eg. )

Get the content of a DIV HTML Tag.

Regular expression for a validating a string with following rules: at least one lowercase letter at least one upper case letter at least one digit length between 6 and 14...