Regular Expression
Difference (last change)
(Author, normal page display)
Changed: 16c16
^A || beginning of line + "A" || a line starting with "A" || a line starting with any other character
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^A || || a line starting with "A" || a line starting with any other character
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Changed: 18,19c18,19
)$ || right parenthesis at the end of line || right parenthesis at the end of line || any other character at the end of line
^.{10}$ || a line exactly 10 characters long | any other line length
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)$ || || right parenthesis at the end of line || any other character at the end of line
^.{10}$ || || a line exactly 10 characters long || any other line length
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RegularExpressions are a special kind of text search commands. They are used in many places in ProWiki and - because ProWiki is written in Perl - the RegularExpressions are used in the Perl flavour.
 | | special commands | meaning | matches | doesn't match |
| . | any character | almost everything | end of line "\n" |
| A* | zero, one or more A | "", "A" or "AAAA" | "B", almost everything else |
| .* | something in between | "asghas" | matches everything |
| A.*B | A and B and something in between | "Alligator Berni" or "AB" | "AC" |
| x+ | one or more "x" | "x", "xx" or "xxxx" | "" or "alpha" |
| \d | a digit | "1" or "6" | "xyz" |
| \s | whitespace | " " or "\t" | "abc" |
| [ABD] | one of the characters between brackets | "A", "B" or "D" | "C" |
| [a-z]+ | one or more lower case characters | "alpha" or "butter" | "ALPHA" |
| (alpha|beta|gamma) | one of the words "alpha", "beta" or "gamma" | "alpha" | "berta" |
| ^ | beginning of line | | |
| ^A | | a line starting with "A" | a line starting with any other character |
| $ | end of line | | |
| )$ | | right parenthesis at the end of line | any other character at the end of line |
| ^.{10}$ | | a line exactly 10 characters long | any other line length |
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RegularExpressions can become arbitrarily complex. There are tutorials and books on this topic. This is just to give you a taste of it.
FolderGlossary
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