RegEx: Unterschied zwischen den Versionen
Aus informatikvs
(→Potpourri) |
|||
| (7 dazwischenliegende Versionen von 2 Benutzern werden nicht angezeigt) | |||
| Zeile 2: | Zeile 2: | ||
== Potpourri == | == Potpourri == | ||
{| class="wikitable" | {| class="wikitable" | ||
| + | ! Character !! Legend | ||
| + | |- | ||
|\d || [0..9] = [0123456789] | |\d || [0..9] = [0123456789] | ||
|- | |- | ||
| Zeile 70: | Zeile 72: | ||
! Character !! Description !! Example !! Sample Match | ! Character !! Description !! Example !! Sample Match | ||
|- | |- | ||
| − | | \n || New line | + | | \n || New line || || |
|- | |- | ||
| − | | \r || Carriage return | + | | \r || Carriage return || || |
|- | |- | ||
| \r\n || Line seperator on Windows || AB\r\nCD || AB<br />CD | | \r\n || Line seperator on Windows || AB\r\nCD || AB<br />CD | ||
| Zeile 78: | Zeile 80: | ||
| \t || Tab || T\tw{2} || T ab | | \t || Tab || T\tw{2} || T ab | ||
|- | |- | ||
| − | | \v || Vertical tab | + | | \v || Vertical tab || || |
|- | |- | ||
| − | | \f || Form Feed | + | | \f || Form Feed || || |
|- | |- | ||
| − | | \xxx || Octal character xxx | + | | \xxx || Octal character xxx || || |
|- | |- | ||
| − | | \xhh || Hex character hh | + | | \xhh || Hex character hh || || |
|} | |} | ||
| + | ==Coach== | ||
| + | * [[Datei:regexp01.PNG]] | ||
Aktuelle Version vom 14. Juli 2017, 12:36 Uhr
... können als Filterkriterien in der Textsuche verwendet werden, indem der Text mit dem Muster des regulären Ausdrucks abgeglichen wird. (Pattern Matching)
Inhaltsverzeichnis
Potpourri
| Character | Legend |
|---|---|
| \d | [0..9] = [0123456789] |
| \D | all but digits - Gegenteil \d |
| \s | whitespaces |
| \S | any "black" character - Gegenteil \s |
| \w | word characters (a-z, 0-9,_) |
| \W | any non-\w |
| * | Zeichen ist NULL oder mehrmals hintereinander im String enthalten |
| ? | Zeichen ist kein oder einmal im String enthalten |
| {n} | Zeichen ist genau n-mal hintereinander im String enthalten |
| {n,m} | Zeichen ist mindestens n, höchstens m-mal hintereinander im String enthalten |
| {n,} | Zeichen ist mindestens n-mal hintereinander im String enthalten |
| [A-Za-z] | only letters |
| [^…] | any character other than ... |
Anchors
| Anchor | Description |
|---|---|
| ^ | Start of string / line |
| \A | Start of string |
| $ | End of string / line |
| \Z | End of string |
| \b | Word boundary |
| \B | Not ... |
| \< | Start of word |
| \> | End of |
Quantifiers
| Quantifier | Description | Example | Sample Match |
|---|---|---|---|
| + | One or more | Version \w-\w+ | Version A-b1_1 |
| {3} | Exactly three times | \D{3} | ABC |
| {2,4} | Two , three or four times | \d{2,4} | 156 |
| {3,} | Three or more times | \w{3,} | regex_tutorial |
| * | Zero or more times | A*B*C* | AAACC |
| ? | Once or None | plurals? | plural |
Special Characters
| Character | Description | Example | Sample Match |
|---|---|---|---|
| \n | New line | ||
| \r | Carriage return | ||
| \r\n | Line seperator on Windows | AB\r\nCD | AB CD |
| \t | Tab | T\tw{2} | T ab |
| \v | Vertical tab | ||
| \f | Form Feed | ||
| \xxx | Octal character xxx | ||
| \xhh | Hex character hh |
