Moderators: white, Hacker, petermad, Stefan2
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((.+?)?(?=\.vbs))(.vbs)$Code: Select all
ev:regex:((.+?)?(?=\.vbs))(.vbs)$
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ed:regex:((.+?)?(?=\.vbs))(.vbs)$
I haven't used Everything yet, and have a question: so TC and Everything RegEx syntax is different? Which one is more powerful?
Everythings Regex Syntax from its help
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Regex Syntax:
a|b Matches a or b
gr(a|e)y Matches gray or grey
. Matches any single character
[abc] Matches a single character a, b or c
[^abc] Matches any single character except a, b or c
[a-z] Matches a single charactor in the range a to z
[a-zA-Z] Matches a single charactor in the range a to z or A to Z
^ Matches the start of the filename
$ Matches the end of the filename
( ) Defines a marked subexpression
\n Matches what the nth marked subexpression matched, where n is a digit from 1 to 9
\b Match word boundaries
* Matches the preceding element zero or more times
? Matches the preceding element zero or one times
+ Matches the preceding element one or more times
*? Lazily matches the preceding element zero or more times
+? Lazily matches the preceding element one or more times
{x} Matches the preceding element x times
{x,} Matches the preceding element x or more times
{x,y} Matches the preceding element between x and y times
\ Escape special character
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Regular expressions
Regular expressions are a very powerful search tool. They allow to search for complex classes of words. Regular expressions are mainly meant for professionals, but can also be useful in the office for finding certain documents (see examples below).
Total Commander supports regular expressions in the following functions:
- Commands - Search (in file name and file contents)
- In Lister
- In the Multi-Rename tool
- In the selection dialog
Regular expressions consist of normal characters and special characters, so-called meta-characters. The following characters are meta-characters or initial parts of meta-characters:
. \ ( ) [ ] { } ^ $ + * ? (only in character classes: - )
Normal characters:
test finds the string "test" in the searched text. Note: This finds "test" ANYWHERE in a file name or on a line in text.
Escape sequences:
A backslash \ starts an Escape sequence. Examples for escape sequences:
\t Tabstop
\xnn Character with hexadecimal code nn. Example: \x20 is the space character. The character table charmap.exe (if installed) shows the character code of most special characters. You can use the Windows calculator in scientific mode to convert from decimal to hex.
\x{nnnn}
Unicode character with hexadecimal code nn. Note that Total Commander now uses Unicode for file names, so you need to use this notation for characters other than basic English.
\[ Left square bracket. Since the square brackets are meta-characters, they need to be written as \[ to search for them in the target string.
\\ Finds a backslash.
\. Finds a dot ("." alone finds any character, see below).
Character classes
Characters in square brackets build a character class. It will find exacly one character from this class. A dash allows to define groups, e.g. [a-z]. A ^ at the beginning finds all characters except for those listed.
Examples:
[aeiou] Finds exactly one of the listed vowels.
[^aeiou] Finds everything except for a vowel.
M[ae][iy]er Finds a Mr. Meier in all possible ways of writing: Mayer, Meyer, Maier, Meier. Very useful if you cannot remember the exact writing of a name.
Meta-characters
Here is a list of the most important meta-characters:
^ Line start
$ Line end
. Any character
\w a letter, digit or underscore _
\W the opposite of \w
\d a digit
\D no digit
\s a word separator (space, tab etc)
\S no word separator
\b finds a word boundary (combination of \s and \S)
\B the opposite of \b
Iterators
Iterators are used for a repetition of the character or expression to the left of the iterator.
* zero or more occurrences
+ one or more occurrences
{n} exactly n occurrences
{n,} at least n occurrences
{n,m} at least n and max. m occurrences
All these operators are "greedy", which means that they take as many characters as they can get. Putting a question mark ? after an operator makes it "non-greedy", i.e. it takes only as many characters as needed.
Example: "b+" applied to the target string "abbbbc" finds "bbbb", "b+?" finds just "b".
Alternatives
Alternatives are put in round brackets, and are separated by a vertical dash.
Example: (John|James|Peter) finds one of the names John, James or Peter.
Subexpressions for search+replace
Text parts in round brackets are taken as subexpressions. Up to 32 subexpressions are supported now.
Example: To swap the title and interpret in the file name of an mp3 file, when they are separated by a dash (Title - Interpret.mp3), use the following options:
Search for: (.*) - (.*)\.mp3
Replace by: $2 - $1.mp3
Here $1 means the text in the first round bracket, and $2 the text in the second round bracket.
New: In "Replace by", use parameters \U, \L, \F, \n to convert from this point on to uppercase, lowercase, first char in word uppercase, and back to unchanged, e.g.
Search for: (.*) - (.*)\.mp3
Replace by: \U$2 - \L$1.mp3
Backreferences
\n Finds subexpression n another time in the search result.
Example: (.+)\1+ finds e.g. abab (where the first ab is found by .+ and the second by \1+ )
Modifiers
Modifiers are used for changing behaviour of regular expressions.
(?i) Ignore Upper-/lowercase. In Total Commander, this is the default for file names.
(?-i) Case-sensitive matching.
(?g) Switches on "greedy" mode (active by default)
(?-g) Turns off "greedy" mode, so "+" means the same as "+?"
The other modificators are not relevant for Total Commander, because the program only supports searching within one line.
Total Commander uses the free Delphi library TRegExpr by Andrey V. Sorokin, available on http://www.regexpstudio.com/
Some of the above explanations are from the help file for this library.
marceepoonu wrote: ↑2019-11-09, 17:33 UTCwhen I tried to run that Regular-Expression
in a Total Commander search window, I got an error message,
Write your regex just in the "Search for:" box and check the [x]RegEx option.
I think that: (?=\.vbs) is considered a modifier by TC, but only the modifiers here above are allowed.Modifiers are used for changing behaviour of regular expressions.
(?i) Ignore Upper-/lowercase. In Total Commander, this is the default for file names.
(?-i) Case-sensitive matching.
(?g) Switches on "greedy" mode (active by default)
(?-g) Turns off "greedy" mode, so "+" means the same as "+?"
Stefan2 wrote: ↑2019-11-11, 09:10 UTCmarceepoonu wrote: ↑2019-11-09, 17:33 UTCwhen I tried to run that Regular-Expression
in a Total Commander search window, I got an error message,Write your regex just in the "Search for:" box and check the [x]RegEx option.
Note, there is also "[WDX] PCREsearch"-plugin by *milo1012 » Fri Sep 13, 2013
based on Perl Compatible Regular Expressions (PCRE) library
https://www.ghisler.ch/board/viewtopic.php?t=38098
HTH
