Regular Expressions 101

Community Patterns

22

Get path from any text

Created·2023-01-31 14:38
Updated·2023-07-23 20:17
Flavor·PCRE2 (PHP)
Recommended·
Get path (windows style) from any type of text (error message, e-mail corps ...), quoted or not. THIS IS THE SINGLE LINE VERSION ! If you want understand how it work or edit it, go https://regex101.com/r/7o2fyy Relative path are not supported The goal is to catch what "Look like" a path. See the limitations UNC path and prefix path like //./], [//?/] or [//./UNC/] are allowed some url path like [file:///C:/] or [file://] are allowed Catch path quoted with ["] and [']. But these quotes are include with the catch Quoted path is not concerned by limitations Limitations : (only unquoted path) [dot] and [space] is allowed, but not in a row [dot+space] or [space+dot at end of file name isn't catched INSIDE A NAME FILE (or last directory if it is a path to a directory) : [comma] is not supported (it stop the catch) after a first [dot], any [space] stop the catch after a [space], catch is stoped if next character is not a [letter], [digit] or [-] so, double [space] stop the catch Compatibility compatible PCRE, PCRE2 AutoHotkey : don't forget to escape "%" in "`%" /!\ Powershell and .Net /!\\ : this regex need some modification to be interpreted by powershell. You have to replace each (?&CapturGroupName) by \k. Use this powershell code to do this replacement : ` $powershellRegex = @' [Put here the regex to replace (?&CapturGroupName) with \k] '@ -replace '\(\?&(\w+)\)', '\k' ` This example code must return : [Put here the regex to replace \k with \k]
Submitted by nitrateag

Community Library Entry

1

Regular Expression
Created·2016-08-25 11:26
Flavor·Python

r"
(^ *\S+ *$)|(^ *(\S+ ){1,3}\S+ *$)|(^ *(\S+ ){5,}\S+ *$)|(^ +(\S+ ){4}\S+ +$)
"
mg
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Description

In the example i search for all lines which have less or more than 5 spaces as seperator.


modify the valid nr of spaces:

there are 3 (of 4) arbitrary groups wich have an specified nr of copies of an regEx in it: in the example the valid nr of entires is 5 : -> that means 4 spaces are valid in-between the entries

  1. Group with specifed nrs: <REGEX> {1,3} :
  • gets alle invalid Entires with 1 to 3 spaces in-between
  1. Group with specifed nrs: <REGEX> {5,} :
  • gets alle invalid Entires with more than 4 spaces in-between
  1. Group with specifed nrs: <REGEX> {4}:
  • gets alle invalid Entires with have the right nr of spaces in between, but they hava invalid spaces at the start and end of line

The 4. Group matches every entry with has no spaces in between

If you want to change the nr of valid entries to e.g. to 10: --> 9 spaces are valid in-beteween

  1. Group with specifed nrs: {1,9}
  2. Group with specifed nrs: {10}
  3. Group with specifed nrs: {9}

Example for Using:

I´ve used this regEx for checking if names are valid to (own created) name-convention. These convention consists always of 5 entries with non-white-Spaces, and this entries are separated wiht 1 space in between.

Submitted by Mike