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<strong>ASP</strong>.<strong>NET</strong> 03.03.2014 27/30
Memento
Character Escapes Description
Ord<strong>in</strong>ary characters Characters other than .$^{[(|)*+\ match themselves.
\b Matches a backspace.
\t Matches a tab.
\r Matches a carriage return.
\v Matches a vertical tab.
\f Matches a form feed.
\n Matches a newl<strong>in</strong>e.
\ If followed by a special character (one of .$^{[(|)*+\), this character
escape matches that character literal. For example, \+ matches the +
character.
Character Class Description
. Matches any character except \n.
[aeiou] Matches any s<strong>in</strong>gle character specified <strong>in</strong> the set.
[^aeiou] Matches any character not specified <strong>in</strong> the set.
[3-7a-dA-D] Matches any character specified <strong>in</strong> the specified ranges (<strong>in</strong> the
example the ranges are 3–7, a–d, A–D).
\w Matches any word character; that is, any alphanumeric character or the
underscore (_).
\W Matches any nonword character.
\s Matches any whitespace character (space, tab, form feed, newl<strong>in</strong>e,
carriagereturn, or vertical feed).
\S Matches any nonwhitespace character.
\d Matches any decimal character.
\D Matches any nondecimal character.
Us<strong>in</strong>g more advanced syntax, you can specify that a certa<strong>in</strong> character or
class of characters must be present at least once, or between two and six
times, and so on. The quantifiers are placed just after a character or a
range of characters and allow you to specify how many times the preced<strong>in</strong>g
character must be matched (see Table 4-19).
Character Class Description
. Matches any character except \n.
[aeiou] Matches any s<strong>in</strong>gle character specified <strong>in</strong> the set.
[^aeiou] Matches any character not specified <strong>in</strong> the set.
[3-7a-dA-D] Matches any character specified <strong>in</strong> the specified ranges (<strong>in</strong> the
example the ranges are 3–7, a–d, A–D).
\w Matches any word character; that is, any alphanumeric character or the
underscore (_).
\W Matches any nonword character.
\s Matches any whitespace character (space, tab, form feed, newl<strong>in</strong>e,
carriage return, or vertical feed).
\S Matches any nonwhitespace character.
\d Matches any decimal character.
\D Matches any nondecimal character.
Quantifier Description
* Zero or more matches
+ One or more matches
Zero or one matches
{N} N matches
{N,} N or more matches
{N,M} Between N and M matches (<strong>in</strong>clusive)
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