Differences

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--- regex:regex [2020/08/20 17:15] – 192.168.1.1
+++ regex:regex [2022/09/20 23:31] (current) – peter
@@ Line 5: / Line 5: @@
 ----
-===== Basic regex =====
+[[Regex:All Text|All Text]]
-^Symbol^Descriptions^
+[[Regex:All Text Not Containing|All Text Not Containing]]
-|.|replaces any character|
-|<nowiki>^</nowiki>|matches start of string|
-|$|matches end of string|
-|*|matches up zero or more times the preceding character|
-|\|Represent special characters|
-|()|Groups regular expressions|
-|?|Matches up exactly one character|
-----
+[[Regex:Alpha|Alpha]]
-===== Characters =====
+[[Regex:Alpha-numeric|Alpha-numeric]]
-^Character^Legend^Example^Sample Match^
+[[Regex:Alpha-numeric and underscore|Alpha-numeric and underscore]]
-|\d|Most engines: one digit from 0 to 9|file_\d\d|file_25|
-|\d|.NET, Python 3: one Unicode digit in any script|file_\d\d|file_9੩|
-|\w|Most engines: "word character": ASCII letter, digit or underscore|\w-\w\w\w|A-b_1|
-|\w|.Python 3: "word character": Unicode letter, ideogram, digit, or underscore|\w-\w\w\w|字-ま_۳|
-|\w|.NET: "word character": Unicode letter, ideogram, digit, or connector|\w-\w\w\w|字-ま‿۳|
-|\s|Most engines: "whitespace character": space, tab, newline, carriage return, vertical tab|a\sb\sc|a b c|
-|\s|.NET, Python 3, JavaScript: "whitespace character": any Unicode separator|a\sb\sc|a b c|
-|\D|One character that is not a digit as defined by your engine's \d|\D\D\D|ABC|
-|\W|One character that is not a word character as defined by your engine's \w|\W\W\W\W\W|*-+=)|
-|\S|One character that is not a whitespace character as defined by your engine's \s|\S\S\S\S|Yoyo|
-----
+[[Regex:Cheat Sheet|Cheat Sheet]]
+[[Regex:Chinese characters|Chinese characters]]
-===== Interval regex =====
+[[Regex:Digits|Digits]]
-These expressions tell us about the number of occurrences of a character in a string.
+[[Regex:File Path|File Path]]
-^Expression^Description^
+[[Regex:Numbers|Numbers]]
-|{n}|Matches the preceding character appearing 'n' times exactly|
-|{n,m}|Matches the preceding character appearing 'n' times but not more than m|
-|{n, }|Matches the preceding character only when it appears 'n' times or more|
+[[Regex:Unicode|Unicode]]
-----
-===== Extended regex =====
-These regular expressions contain combinations of more than one expression.
-^Expression^Description^
-|\+|Matches one or more occurrence of the previous character|
-|\?|Matches zero or one occurrence of the previous character|
 ----
-===== Brace expansion =====
+===== References =====
-The syntax for brace expansion is either a sequence or a comma separated list of items inside curly braces "{}".
+https://en.wikipedia.org/wiki/Regular_expression
-The starting and ending items in a sequence are separated by two periods "..".
+https://www.regular-expressions.info/refadv.html
-^Expression^Description^
-|{a,b,c,d}|Matches the actual characters in the braces.  Example: echo {a,b,c,d}|
-|{a..z}|Matches a thru z.  Example: echo {a..z}|
-|{0..9}|Matches 0 thru 9.  Example: echo {0..9}|
-----
+https://www.rexegg.com/regex-disambiguation.html