regex – Fix Code Error

why javascript regex is throwing error for special characters even after using ”?

June 19, 2021 by Code Error

Posted By: Anonymous I am trying to catch invalid operators passed to eval() function so that it can display invalid expression on screen but it’s not working. Is there something I am missing? sorry if this sounds silly but I am beginner to JavaScript. function evaluating(el){ var invalidOperators = [‘//’,’**’,’+/’,’/+’,’+*’,’*+’,’-/’,’/-‘,’-*’,’/*’,’*/’]; var i; for(i=0;i<invalidOperators.length;i++){ if(el.search(invalidOperators[i])!= -1){ …

Is there an easy way to pull letters from a string php

June 19, 2021 by Code Error

Posted By: Anonymous If I gave you a string like: AAAAAYYYYYTTTTTAAAAA and said pull the A’s out so they create an array of entries to look like: [AAAAA, AAAAA] How could I accomplish that? I thought of explode, but I am not sure if that would work here. Is this a regex thing? I will …

Problem with finding proper regular expression in my solution from Codewars task named Mumbling

June 19, 2021 by Code Error

Posted By: Anonymous I am looking at the Mumbling code challenge on CodeWars: The examples below show you how to write function accum: Examples: accum("abcd") -> "A-Bb-Ccc-Dddd" accum("RqaEzty") -> "R-Qq-Aaa-Eeee-Zzzzz-Tttttt-Yyyyyyy" accum("cwAt") -> "C-Ww-Aaa-Tttt" The parameter of accum is a string which includes only letters from a..z and A..Z. This is my attempt: function accum(s) { …

Variable-length lookbehind for backslashes

June 19, 2021 by Code Error

Posted By: Anonymous What seemed to be a simple task ended up to not work as expected… I’m trying to match $w+b, unless it’s preceded by an uneven number of backslashes. Examples (only $result should be in the match): This $result should be matched This $result should not be matched This \$result should be matched …

Understanding how greedy Regex match interacts with multiple adjacent capture groups

June 18, 2021 by Code Error

Posted By: Anonymous How does ^(x*)(.+)- 2= 1$ match "xxx – xx = x"? I am not understanding how the capture group 2 is "xx" and how capture group 1 is "x". Shouldn’t group 1 be "xxx" since (x*) is asking for "x" 0 or more times which means it should cover all the x’s …

Getting a substring from a message of string to push in array

June 18, 2021 by Code Error

Posted By: Anonymous So basically i want to get the user from a message that has a starting special character like "@" or "#" and push it to the user_lists without the special character only the user. I know about using regex for matching but im having troubled with pushing every match to an array. …

R how to match and extract character letters of different length in a string

June 18, 2021 by Code Error

Posted By: Anonymous So I have a column of contract names df$name like below FB210618C00280000 ADM210618C00280000 M210618P00280000 I would like to extract the FB, ADM and M. That is I want to extract characters in the string and they are of different length and stop once the first number occurs, and I don’t want to …

How do i select text with regex based on tag and class content in html?

June 18, 2021 by Code Error

Posted By: Anonymous I have an html tag as a string. If ‘md’ is included in the class attribute in this tag, I want to select it and get the expression in the tag. Example: ‘<tag class="…blah md blah…">(expression)</tag> <tag></tag> is first selector Class attribute included md is second selector At the same time, the …

Regex Pattern to ignore the inner parenthesis in the input string

June 18, 2021 by Code Error

Posted By: Anonymous I have been struggling to find the solution for below requirement Input string is Sum(Spec("any text1" : "any text2"),spec("any text3" : "any text4")) I want to match the string spec("any text1" : "any text2") and spec("any text3" : "any text4")) pattern which I tried is Spec(([^)]*)) This pattern works for above input …

How to replace a string with parts of it between markers (regex)?

June 18, 2021 by Code Error

Posted By: Anonymous I have a text, let’s say: Lorem ipsum dolor sit [[amet]], consectetur adipiscing elit, sed do eiusmod [[time (sample)|tempor]] incididunt ut [[labore]] et dolore magna aliqua. I want to replace the [[time (sample)|tempor]] with tempor. The structure is always the same: [[string to remove|string to extract]] and can appear several times in …

Regular expression in R to remove pairs

June 18, 2021 by Code Error

Posted By: Anonymous I have a code that outputs a pair of integers as "(1, 21)", as a string. The integers are always between 1 and 99. I want to extract the integers into an array as numeric. How can I do this? I’ve done some research and it seems regex is the way to …

How can I parse all words inside a specific div/class/element with my regex?

June 18, 2021 by Code Error

Posted By: Anonymous My idea is to find and replace all hashtags words in a specific div/classname/Id and replace this with a link, but I can’t find a right way to do that: My regex so far: const regex = new RegExp(‘/(?:^|s)#([a-zA-Zd]+)/’, ‘gi’); Can someone help me with this? <div class="Post-body"> is simply #dummy text …

Match string followed by another string

June 18, 2021 by Code Error

Posted By: Anonymous I have a regular expression newbie question. I am trying to do a case insensitive search in a string. I need to search cgif followed by any text and ending in .txt but the code below does not work. What am I missing? using System; using System.Text.RegularExpressions; public class Program { public …

Replace a list of elements with regex

June 18, 2021 by Code Error

Posted By: Anonymous I have a text full of adverbes and it’s replacements like this : adverbe1 |replacement1 adverbe2 |replacement2 adverbe3 |replacement3 And i want the adverbes to replaced in my text: Example : ‘Hello adverbe1 this is a test’ to be this : ‘Hello replacement1 this is a test’ but am runing out of …

Regular Expression for custom price filter

June 17, 2021 by Code Error

Posted By: Anonymous I am working on a regex for prices in specific formats. Valid inputs are: Natural Numbers Decimals(upto two places after decimal point) except 0.0 and 0.00 All the above criteria without leading zeroes (ex- 05 and 08.45 are invalid but 5 and 8.45 are valid) Examples of valid test cases 1 11 …

google sheet replace regex formula

June 17, 2021 by Code Error

Posted By: Anonymous I want to remove any string that matches: _digitsxdigits like _8x7 and _999x1 =ArrayFormula(if((Input!A10:A=TRUE), SUBSTITUTE(Input!E10:E, REGEXEXTRACT(Input!E10:E,"[0-9]x[0-9]"),""), "")) I get this error, but I’m not sure how to fix it. Solution try: =INDEX(IF(A10:A=TRUE, REGEXREPLACE(E10:E, "(_d+xd+)", ), )) Answered By: Anonymous

Regex pattern to identify only one set of curly brackets

June 17, 2021 by Code Error

Posted By: Anonymous I’m looking for a regex pattern which will match only one set of curly brackets. Basically I have a object like this: {Hello: ‘${name}’} and I want a pattern which will only replace the brackets around the variable and not all. The output should be something like: {Hello: ‘name’} and the value …

How to match regex in python?

June 17, 2021 by Code Error

Posted By: Anonymous describe aws_security_group({:group_id=>"sg-ezsrzerzer", :vpc_id=>"vpc-zfds54zef4s"}) do I try to filter the sg-ezsrzerzer out of it (so I want to filter on start sg- till double quote). I’m using python I currently have: import re a = ‘describe aws_security_group({:group_id=>"sg-ezsrzerzer", :vpc_id=>"vpc-zfds54zef4s"}) do’ test = re.findall(r’bsg-.*b’, a) print(test) output is [‘sg-ezsrzerzer", :vpc_id=>"vpc-zfds54zef4s"}) do’] How do I only …

Regex discard words that have less than 3 characters

June 17, 2021 by Code Error

Posted By: Anonymous I previously asked a question here about wrapping all the words that have double quotes. That work fine. However I need to discard in the array, all the words that: have less than 2 characters AND are not inside the double quotes if the 2 characters are inside the double quotes, than …

Understanding group and or in regular expression

June 17, 2021 by Code Error

Posted By: Anonymous I’m looking for words like "one year", "two years", "2-3 years" or "3 – 4 years" in a long string. I’ve tried to do it using regular expressions. But I’m not sure that I got it when groups are involved. Let’s see what I mean: import re text = ‘one year, honey …

Regex IfThenElse pattern returning null character

June 17, 2021 by Code Error

Posted By: Anonymous Using the pattern: (?((?<=(Textbook|Online Class): (Yes|No))(?!(Textbook|Online Class): (Yes|No))).+|(?<=(\d{4}))(?!(U000)).+) Gives me: Error: null character not allowed I wanted the pattern to discern if Textbook/Online: Yes/No is present and not followed by Textbook/Online: Yes/No then capture the rest, else find a four digit number not followed by "U000" and capture the rest. To be …

Java – Regex, nested recursion match

June 17, 2021 by Code Error

Posted By: Anonymous I’m trying to create a regex pattern to match each (content*), but the pattern can be found inside another ( (content) (content) ). I tried "((.*?))" but this returns the outer ones. For example: the string (‘fdmg’) (R:Percentual (‘dmg’) (20)) should return: match one: fdmg match two: R:Percentual (‘dmg’) (20) Edit: I …

How to use regex in BS4 `find_all` to return matched items with pattern priority?

June 17, 2021 by Code Error

Posted By: Anonymous I have the following regex expression: import re re.compile(‘|’.join([pattern1, pattern2, pattern3])) I would like it to work in the following way: Try to match only pattern1; if matched – stop; else – proceed. Try to match only pattern2; if matched – stop; else – proceed. Try to match only pattern3; stop. However …

How two regex are so different with just a work boundary?

June 17, 2021 by Code Error

Posted By: Anonymous I was looking for a regex that finds the words that are followed by the word cat, So I come up with two regexes and I know the second one is correct. But I couldn’t understand that with just a word boundary the result is totally different, I couldn’t understand why. What …

Text File Parsing and convert to JSON?

June 16, 2021 by Code Error

Posted By: Anonymous First, thanks for reading this! Second, I have no control over the .txt file that I am getting my data from. I’d like to be able to take the data and separate it into Complete Matches and then show those results then Upcoming Matches and show those. For Example: Most Recent Completed …

how to replace html tag with braces

June 16, 2021 by Code Error

Posted By: Anonymous I have html string Lorem impsum text need replace tags braces final result should look like this Lorem impsum {{text}} Solution I would recomment not to use regexpt but to parse the string using the standard DOM tools: _x000D_ _x000D_ const str=”Lorem impsum text And some more Lorem impsum …

Regex to validate only zeros

June 16, 2021 by Code Error

Posted By: Anonymous I am trying to find the regex to validate only zeros. "0", "00", "000" … Several unsuccessful attempts: "0+", "0 {1,}" … import java.util.regex.Matcher; import java.util.regex.Pattern; public class TestRegExp { public static String REG_EXP_ONLY_ZEROS = "(0)+"; public static void main(String[] args) { Pattern pat = Pattern.compile("0"); Matcher mat = pat.matcher(REG_EXP_ONLY_ZEROS); if (mat.matches()) …

Replace exact word even if it is surrounded by underscore or other symbols

June 16, 2021 by Code Error

Posted By: Anonymous I’m trying to search for this exact word win to replace it by another word fly but words like window become flydow. I tried the boundaries bwinb but the word win is not found when it’s followed or proceeded by an underscore or by a hyphen. For example: _win_ or _win- Any …

Need to extract text in a C# Regex

June 16, 2021 by Code Error

Posted By: Anonymous I have a collection of strings such as Some song [FEAT. John Doe] and I’m trying to extract the ‘featured’ part. It could be identified by one of several different words "FEAT|FEAT\.|Featuring" and may or may not be enclosed by brackets. I’m using a Regex for this and here is what I’ve …

Ansible and regex_search

June 16, 2021 by Code Error

Posted By: Anonymous I’m currently struggling to have a working playbook using regex_search, I’m trying to have the playbook go through the stdout of a network command (show run vlan ID) and then go through a regex expression which will extract all the interface tagged, ultimately that variable would be use to deploy a new …