13
Character Meanin
Remarks
[^]
Matches a single character not
contained within the brackets.
For example, [^16A] means to match a string
containing any character except 1, 6 or A, and the
matching string can also contain 1, 6 or A, but
cannot contain these three characters only. For
example, [^16A] matches “abc” and “m16," but
not 1, 16, or 16A.
\<string
Matches a character string starting
with string.
For example, “\<do” matches word “domain” and
string “doa."
string\>
Matches a character string ending
with string.
For example, “do\>” matches word “undo” and
string “abcdo."
\bcharacter2
Matches character1character2.
character1 can be any character
except number, letter or underline,
and \b equals [^A-Za-z0-9_].
For example, “\ba” matches “-a” with “-“ being
character1, and “a” being character2, but it does
not match “2a” or “ba."
\Bcharacter
Matches a string containing
character and no space is allowed
before character.
For example, “\Bt” matches “t” in “install," but not
“t” in “big top."
character1\w
Matches character1character2.
character2 must be a number, letter,
or underline, and \w equals
[^A-Za-z0-9_].
For example, “v\w” matches “vlan," with “v” being
character1, and “l” being character2. v\w also
matches “service," with “i” being character2.
\W Equals \b.
For example, “\Wa” matches “-a," with “-” being
character1, and “a” being character2, but does not
match “2a” or “ba."
\
Escape character. If a special
character listed in this table follows
\, the specific meaning of the
character is removed.
For example, “\\” matches a string containing “\,"
“\^” matches a string containing “^," and “\\b”
matches a string containing “\b."
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