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REGEX QUESTIONS

Using regex in htaccess to 410 status spammy URLs
Using regex in htaccess to 410 status spammy URLs
it helps some times I'm trying to set up some rules in the htaccess file to combat some spammy incoming links to our site. For example, some spam sites out there are linking to our site in the following way: , Try with:
TAG : regex
Date : November 25 2020, 09:00 AM , By : Man Red
Space separated text to vector in R
Space separated text to vector in R
will be helpful for those in need You could use strsplit() for this. For a possible one or more spaces we use \\s+ for our split value. Then since strsplit() returns a list the length of it's first argument, we can drop in back to a character vector
TAG : regex
Date : November 25 2020, 09:00 AM , By : Egor Tomilin
Capture multiple groups in the same line
Capture multiple groups in the same line
this one helps. I would like to split a multiline text by "." Somethigne like this: , If you want a capture group:
TAG : regex
Date : November 24 2020, 09:00 AM , By : Anika Ahmed
Use regex with sed to replace spaces by underscore
Use regex with sed to replace spaces by underscore
around this issue If your sed is gnu sed, you can mix NUMBER and g modifier in order to skip the first space:
TAG : regex
Date : November 24 2020, 09:00 AM , By : Lycurgus 3.1
Dynamically-created 'zip' command not excluding directories properly
Dynamically-created 'zip' command not excluding directories properly
I hope this helps . I suspected the problem would be in the evaluation of the generated command, since you said the same command when executed directly did right.So as the comment section says, I think you already found the correct solution. This hap
TAG : regex
Date : November 23 2020, 09:01 AM , By : tauceef
Groovy regexes and wildcard permissions
Groovy regexes and wildcard permissions
Hope this helps You need to escape square brackets and, to match index, you need to use .*, which means "any char, any number of times". Also, groovy's slashy string syntax helps:
TAG : regex
Date : November 23 2020, 09:01 AM , By : Selva kumar R
Find exact match string that contains a + character
Find exact match string that contains a + character
I hope this helps you . My URLs look like this: www.example.com/historical+locations/london and www.example.com/special/london , You must to escape the plus sign on regex \+
TAG : regex
Date : November 23 2020, 09:01 AM , By : 萩盛樹
filter dplyr sqlite3 connection using regex
filter dplyr sqlite3 connection using regex
Hope this helps Unfortunately, dplyr can't translate many useful functions into the sql query it passes on to sqlite. You can see the list of functions it can in the dplyr database vignette:
TAG : regex
Date : November 23 2020, 09:01 AM , By : Rachel Spaulding
Regex to check for repetition
Regex to check for repetition
fixed the issue. Will look into that further I think @tobias_k is on the right track by suggesting that it's a good strategy to check for strings that have repetition, but I think you can have a more comprehensive regular expression that limits the c
TAG : regex
Date : November 23 2020, 09:01 AM , By : Mubarakkk
How can I tell if my perl process has used the regex $PREMATCH/$MATCH/$POSTMATCH vars (or the short equivilents $`/$'/$&
How can I tell if my perl process has used the regex $PREMATCH/$MATCH/$POSTMATCH vars (or the short equivilents $`/$'/$&
wish of those help How can I tell if my perl process has used the regex vars $PREMATCH/$MATCH/$POSTMATCH (or the short equivalents $`/$'/$)?
TAG : regex
Date : November 23 2020, 09:01 AM , By : Sonthosh B
Regex to handle leading spaces (notepad++)
Regex to handle leading spaces (notepad++)
Any of those help To use a regex-based replacement in Notepad++, turn on the Regular expression radio button at the bottom of the Find and Replace window! (see my settings below)Here is a regex that must work for you:
TAG : regex
Date : November 22 2020, 02:59 PM , By : Morfin Paul
Regex pattern to start with first digit and end at last hyphen (if it exists)
Regex pattern to start with first digit and end at last hyphen (if it exists)
will be helpful for those in need I have a regex pattern that almost works, but I can't quite get it totally correct. My goal is that if a string starts with letters, to ignore them up to the first digit. The second part of the pattern needs to make
TAG : regex
Date : November 22 2020, 02:59 PM , By : Franz Criego
Apache's SetEnvIf to another variable in .htaccess
Apache's SetEnvIf to another variable in .htaccess
wish of those help Is it possible using SetEnvIf to set a variable to the content of another variable? and if so, how? , You can use it like this:
TAG : regex
Date : November 22 2020, 02:42 PM , By : Sniffer
string -- x y in REGEX
string -- x y in REGEX
To fix this issue Quick question. I have this string
TAG : regex
Date : November 22 2020, 02:42 PM , By : Bayan Bennett
Find a word preceding a symbol set
Find a word preceding a symbol set
I wish this helpful for you How can I find a word that preceding to [¹²³⁴⁵⁶⁷⁸⁹⁰]. For ex.: , This will match your examples. Codepoints:
TAG : regex
Date : November 22 2020, 09:00 AM , By : Nishant Motam
Hubot Not Responding to regex
Hubot Not Responding to regex
it helps some times In Hubot, the respond regex is anchored, so the whole string should match.Thus, you need to either add .* or[\s\S]* on both ends of the regex. Also, I recommend to add word boundaries \b to make sure you match a whole word.
TAG : regex
Date : November 22 2020, 09:00 AM , By : alpsberry
DataAnnotations validation adding `@` to RegularExpression
DataAnnotations validation adding `@` to RegularExpression
With these it helps How do I add to accept @ along with the RegularExpression I have below? , Use
TAG : regex
Date : November 21 2020, 09:01 AM , By : howardlykim
yytext contains characters not in match
yytext contains characters not in match
seems to work fine I don't see how that output could be produced from your lexer, but it is easy to see how it could be produced in your parser.Basically, it is not correct to retain the value of yytext:
TAG : regex
Date : November 21 2020, 09:01 AM , By : Daniel Fast
Using ampersand in sed
Using ampersand in sed
I hope this helps . I have a csv file full of lines like the following: , You are saying
TAG : regex
Date : November 21 2020, 07:38 AM , By : Kaan Bingol
Regex to find all spaces in lines beginning with a specific string
Regex to find all spaces in lines beginning with a specific string
I think the issue was by ths following , Using PCRE regex to find all the spaces on a line starting with a particular text, use this regex:
TAG : regex
Date : November 21 2020, 07:38 AM , By : Tim Johansson
nim re, regex modul is not filling match group
nim re, regex modul is not filling match group
Hope this helps The re module is deprecated and has been a bit buggy in my experience. You can use the new nre module:
TAG : regex
Date : November 21 2020, 07:38 AM , By : jdoss
Get repeating regex groups in scala
Get repeating regex groups in scala
help you fix your problem You can't do it in one step. Scala does not support looking at match instances of a repeated group(*).Break it up:
TAG : regex
Date : November 19 2020, 09:01 AM , By : Rha
Extract string matching regex from string
Extract string matching regex from string
I wish did fix the issue. You should match the whole string, group the date and replace with the group :
TAG : regex
Date : November 19 2020, 09:01 AM , By : Musa
Matlab: how to optimize a code to find postfix in a sting
Matlab: how to optimize a code to find postfix in a sting
hope this fix your issue I have a cell 106x1 of strings TrajCompact. In every string I want to find all the prefix that are combination of (0,1,2,3,4) and consider only the postfix after this prefix My prefix are: , You should solve the problem insid
TAG : regex
Date : November 19 2020, 09:01 AM , By : CHRIS
Redirect Match with excluding URLs doesnt work
Redirect Match with excluding URLs doesnt work
should help you out Your rule currently is: (broken down to multiple lines for better display/understanding):
TAG : regex
Date : November 19 2020, 12:35 AM , By : Simon Hüning
How to replace paired tokens with possible newlines inside?
How to replace paired tokens with possible newlines inside?
I wish this help you Using a perl one-liner and the flip-flop operator:
TAG : regex
Date : November 18 2020, 09:01 AM , By : SqlAdmin
How to use regex in grep shell command
How to use regex in grep shell command
like below fixes the issue Plain old grep uses Basic Regular Expression so you don't have immediate access to the + quantifier. In modern (POSIX) grep you can use this functionality, but it requires a backslash before the quantifier, like \+:
TAG : regex
Date : November 16 2020, 09:01 AM , By : wakojako49
How to use lookahead in regex to match a word that only appear in certain context?
How to use lookahead in regex to match a word that only appear in certain context?
wish helps you You should use lookbehind if it is supported by your regex engine. Like so:
TAG : regex
Date : November 16 2020, 09:01 AM , By : Jiao Chen
Awk to extract and format a highly variable text file
Awk to extract and format a highly variable text file
wish help you to fix your issue Your input file's not so bad. Assuming your input file is semi-colon separated: Replace all blank chars in $2 with a ; to split that up into separate fields for output, then if there's a blank in $3 then replace the fi
TAG : regex
Date : November 14 2020, 09:01 AM , By : JoshuaWantsToLearn
Algorithm complexity of combined regular expressions
Algorithm complexity of combined regular expressions
wish helps you Most regex engines create a trie when you use alternations, for each level of an alternation group.I'd imagine it doesn't use a switch like statement, more like a linked
TAG : regex
Date : November 14 2020, 09:01 AM , By : westlife. punk
Using sed to replace string matching regex with wildcards
Using sed to replace string matching regex with wildcards
Any of those help I have a string I'm trying manipulate with sed , This works
TAG : regex
Date : November 14 2020, 09:01 AM , By : Jen
HTML pattern attribute for space and list of words
HTML pattern attribute for space and list of words
may help you . I am working on validating user input in a html form. I want the form to catch any blank spaces and a list of words not permitted. , you could validate with Javascript like this:
TAG : regex
Date : November 14 2020, 09:01 AM , By : GD Gupta
removing strings from a vector
removing strings from a vector
help you fix your problem Just a side-note: [:upper:] matches uppercase letters in the current locale (see source). Thus, this solution is good if you work with one locale:
TAG : regex
Date : November 14 2020, 07:01 AM , By : RubyRoid
How to select number that follow any symbol except whitespace
How to select number that follow any symbol except whitespace
I wish this helpful for you An expression with negative look-behind (?
TAG : regex
Date : November 14 2020, 07:01 AM , By : Alexandre Nobre
how to make vim syn regex to capture word with trailing space?
how to make vim syn regex to capture word with trailing space?
I wish did fix the issue. You could do it this way (this is probably not very convenient but I can't think of a better way because of the following whitespace)
TAG : regex
Date : November 14 2020, 07:01 AM , By : fabio2x4
Include the splitting pattern/token from scala regex.split()
Include the splitting pattern/token from scala regex.split()
I wish this helpful for you For a non-complicated pattern that does not involve patterns of indefinite width, you can use a lookbehind/lookahead solution:
TAG : regex
Date : November 14 2020, 07:01 AM , By : Ted Smith
How to replace text wrapped by tabs using regular expression and Sublime Text?
How to replace text wrapped by tabs using regular expression and Sublime Text?
seems to work fine You're repeating the capture group; only the last word character will be captured. Place the operator inside of the group construct to quantify the \w token instead of the group.Use Ctrl+H to open the Search and Replace, enable Reg
TAG : regex
Date : November 14 2020, 06:58 AM , By : donkee
Python regex split before regular expression
Python regex split before regular expression
I think the issue was by ths following , Here is the problem: , You can use a regex similar to this one:
TAG : regex
Date : November 14 2020, 06:58 AM , By : Paul Wicker
slug url won't display url's that don't have hyphens
slug url won't display url's that don't have hyphens
Any of those help for some reason I can't view pages which have a slug without a hyphen. For example: , The problem is in you url ordering.
TAG : regex
Date : November 14 2020, 06:58 AM , By : JScott
Tcl: Regsub does not substitute a string while parsing HTML snipet
Tcl: Regsub does not substitute a string while parsing HTML snipet
may help you . The problem is that the string you are matching contains unquoted RE metacharacters. The ones I notice are parentheses (around the sizes):
TAG : regex
Date : November 13 2020, 05:43 AM , By : Faark
REGEX in R: extracting words from a string
REGEX in R: extracting words from a string
I think the issue was by ths following , You've already accepted an answer, but I'm going to share this as a means of helping you understand a little more about regex in R, since you were actually very close to getting the answer on your own.
TAG : regex
Date : November 13 2020, 05:43 AM , By : boblotus
Unable to define regular expression for re.compile and pass it to Beautifulsoup
Unable to define regular expression for re.compile and pass it to Beautifulsoup
like below fixes the issue You doesn't need to use a regex to select an element with Beautiful Soup: it can extract all the tags with specific attributes by itself.Further, it's better to not use a regex to parse HTML (see this popular question).
TAG : regex
Date : November 13 2020, 05:43 AM , By : Abhishek Patel
How to remove extra spaces from a specific string?
How to remove extra spaces from a specific string?
will be helpful for those in need You can achieve that by splitting the input with a comma, then trimming and shrinking multiple spaces into 1, and String.Joining back.Just showing how it can be done using LINQ:
TAG : regex
Date : November 12 2020, 09:01 AM , By : Dustin
Splitting a string with a number in the end in R
Splitting a string with a number in the end in R
may help you . How can I split a string which contains a number (of unknown number of digits) into two strings - the number and the rest of the string. Notice that there could be other numbers in the string which should not be affected. For example:
TAG : regex
Date : November 09 2020, 09:01 AM , By : Creative Gaters
Why doesn't this regex work with grep?
Why doesn't this regex work with grep?
around this issue The input is a very basic html page with a git branch name and short commit hash, ex: , With GNU grep:
TAG : regex
Date : November 09 2020, 09:01 AM , By : Tad
Using grep and wc with wildcards on a file
Using grep and wc with wildcards on a file
I wish this help you 1) add a space inside pattern, so Johnson is hidden grep -i "John " students.txt2) Wildcards can never be better than exact value - stick with it
TAG : regex
Date : November 08 2020, 09:00 AM , By : Travis Collins
Regular expression to avoid duplicate numbers separated by comma
Regular expression to avoid duplicate numbers separated by comma
like below fixes the issue If all you have are numbers, this might work.This doesn't address the viability of integers though, just characters.
TAG : regex
Date : November 08 2020, 09:00 AM , By : Rotimi Tomomewo
Get superscript numbers followed one by other as one string
Get superscript numbers followed one by other as one string
wish helps you I use following code to get a superscript numbers: , You just need to add a + quantifier:
TAG : regex
Date : November 07 2020, 01:32 PM , By : Ahmed Kamal Elhamahm
MongoDB regex reverse
MongoDB regex reverse
may help you . There is no such an opportunity in Mongo. $where operator is the only way to perform this server-side.
TAG : regex
Date : November 07 2020, 09:00 AM , By : MaxBioHazard
compare dot(.) on specific position using regex
compare dot(.) on specific position using regex
around this issue I have few input ex.
TAG : regex
Date : November 07 2020, 09:00 AM , By : Arun V.A
R - raw text to a data.frame
R - raw text to a data.frame
will help you I work on raw textual data from a scanned catalog. I want to convert my string vector to a data.frame object. My vector consists of an alphabetical list of people who performed each one or more work. , This gives the correct result with
TAG : regex
Date : November 07 2020, 09:00 AM , By : Rahin Islam
Regular expression for parsing name and email from text
Regular expression for parsing name and email from text
will help you Here is another possible regex, which I split in three lines for clarity, but should be on one line:
TAG : regex
Date : November 07 2020, 09:00 AM , By : Xpuma
regex in command line
regex in command line
I hope this helps you . You don't even need find for this. Just use glob expression to match ([1-9) pattern:
TAG : regex
Date : November 06 2020, 09:01 AM , By : nemo c
Receiving some inaccurate (or no) grep matches for numbers in garbled text
Receiving some inaccurate (or no) grep matches for numbers in garbled text
hop of those help? Your last pattern looks good but don't escape the quantifier and use grep with options -Po -P --perl-regexp   Interpret PATTERN as a Perl regular expression. -o --only-matching   Show only the part of a matching line that matches P
TAG : regex
Date : November 06 2020, 04:03 AM , By : Manuel Montes Martin
Regular expression to replace part of the expression in a json object
Regular expression to replace part of the expression in a json object
wish help you to fix your issue You have to escape the "s or use ' as a wrapper instead of " You have to escape the control characters twice in R, i.e. \\{, \\^ and especially \\\\ because \ is a control character in R! (Every \\ is replaces by \ and
TAG : regex
Date : November 06 2020, 03:59 AM , By : Heir
R: How to group and aggregate list elements using regex?
R: How to group and aggregate list elements using regex?
this will help Here are two approaches. No packages are used in either one.1) Using lists Create a two column data.frame S from the groups whose columns are the products (value column) and associated groups (ind column). Create the list to split by,
TAG : regex
Date : November 05 2020, 07:07 PM , By : Andrew
Sed: Matching words with any permutation of two characters
Sed: Matching words with any permutation of two characters
wish help you to fix your issue I'm trying to match all laughing words in a corpus and convert them into one standard word, like "haha". Examples of laughing words are , You can use this sed command:
TAG : regex
Date : November 05 2020, 06:58 PM , By : Akhilesh Saini
Regular expression matching
Regular expression matching
I wish this helpful for you I want to match , Try this regexp:
TAG : regex
Date : November 05 2020, 09:01 AM , By : Anshul
What is wrong with this regex in my rule redirect? (web.config)
What is wrong with this regex in my rule redirect? (web.config)
may help you . This is a Azure WebApp web.config question. I want to redirect all non-HTTPS requests to same url but with HTTPS, basically replacing the HTTP with HTTPS. But not if the url containst following string: "/config/add_new_user?login=xxxw=
TAG : regex
Date : November 04 2020, 09:01 AM , By : syed obaid
Regex that grabs all occurrences of strings that start with '@'
Regex that grabs all occurrences of strings that start with '@'
help you fix your problem I am new to writing Regular Expressions and I'm building an app that needs to look for all occurrences of the @ symbol and the rest of the string. For example: , Try this pattern:
TAG : regex
Date : November 04 2020, 09:01 AM , By : skhachatryan

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