about_Regular_Expressions
Se aplica a: Windows PowerShell 2.0, Windows PowerShell 3.0
Insertar la introducción aquí.
TEMA
about_Regular_Expressions
DESCRIPCIÓN BREVE
Describe expresiones regulares en Windows PowerShell®.
DESCRIPCIÓN LARGA
Windows PowerShell admite los siguientes caracteres de expresiones regulares.
Format Logic Example
-------- ------------------------------- -----------------------
value Matches exact characters "book" -match "oo"
anywhere in the original value.
. Matches any single character. "copy" -match "c..y"
[value] Matches at least one of the "big" -match "b[iou]g"
characters in the brackets.
[range] Matches at least one of the "and" -match "[a-e]nd"
characters within the range.
The use of a hyphen (–) allows
you to specify an adjacent
character.
[^] Matches any characters except "and" -match "[^brt]nd"
those in brackets.
^ Matches the beginning "book" -match "^bo"
characters.
$ Matches the end characters. "book" -match "ok$"
* Matches any instances "baggy" -match "g*"
of the preceding character.
? Matches zero or one instance "baggy" -match "g?"
of the preceding character.
\ Matches the character that "Try$" -match "Try\$"
follows as an escaped character.
Windows PowerShell admite las clases de caracteres disponibles en las expresiones regulares de Microsoft .NET Framework.
Format Logic Example
-------- ------------------------------- -----------------------
\p{name} Matches any character in the "abcd defg" -match "\p{Ll}+"
named character class specified
by {name}. Supported names are
Unicode groups and block
ranges such as Ll, Nd,
Z, IsGreek, and IsBoxDrawing.
\P{name} Matches text not included in 1234 -match "\P{Ll}+"
the groups and block ranges
specified in {name}.
\w Matches any word character. "abcd defg" -match "\w+"
Equivalent to the Unicode (this matches abcd)
character categories [\p{Ll}
\p{Lu}\p{Lt}\p{Lo}\p{Nd}\p{Pc}].
If ECMAScript-compliant behavior
is specified with the ECMAScript
option, \w is equivalent to
[a-zA-Z_0-9].
\W Matches any nonword character. "abcd defg" -match "\W+"
Equivalent to the Unicode (This matches the space)
categories [^\p{Ll}\p{Lu}\p{Lt}
\p{Lo}\p{Nd}\p{Pc}].
\s Matches any white-space "abcd defg" -match "\s+"
character. Equivalent to the
Unicode character categories
[\f\n\r\t\v\x85\p{Z}].
\S Matches any non-white-space "abcd defg" -match "\S+"
character. Equivalent to the
Unicode character categories
[^\f\n\r\t\v\x85\p{Z}].
\d Matches any decimal digit. 12345 -match "\d+"
Equivalent to \p{Nd} for
Unicode and [0-9] for non-
Unicode behavior.
\D Matches any nondigit. "abcd" -match "\D+"
Equivalent to \P{Nd} for
Unicode and [^0-9] for non-
Unicode behavior.
Windows PowerShell admite los cuantificadores disponibles en expresiones regulares de .NET Framework. A continuación se muestran algunos ejemplos de cuantificadores.
Format Logic Example
-------- ------------------------------- -----------------------
* Specifies zero or more matches; "abc" -match "\w*"
for example, \w* or (abc)*.
Equivalent to {0,}.
+ Matches repeating instances of "xyxyxy" -match "xy+"
the preceding characters.
? Specifies zero or one matches; "abc" -match "\w?"
for example, \w? or (abc)?.
Equivalent to {0,1}.
{n} Specifies exactly n matches; "abc" -match "\w{2}"
for example, (pizza){2}.
{n,} Specifies at least n matches; "abc" -match "\w{2,}"
for example, (abc){2,}.
{n,m} Specifies at least n, but no "abc" -match "\w{2,3}"
more than m, matches.
Todas las comparaciones que aparecen en la tabla anterior se evalúan como verdaderas.
Observe que el carácter de escape de las expresiones regulares, una barra diagonal inversa (\), es diferente del carácter de escape de Windows PowerShell. El carácter de escape de Windows PowerShell es el carácter de acento grave (`) (96 en ASCII).
Para más información, vea el tema "Lenguaje de expresiones regulares - Referencia rápida" en Microsoft Developer Network (MSDN) Library, en el vínculo https://go.microsoft.com/fwlink/?LinkId=133231.
VEA TAMBIÉN
about_Comparison_Operators
about_Operators