Questions tagged [regex]
Regular expressions provide a declarative language to match patterns within strings. They are commonly used for string validation, parsing, and transformation. Specify the language (PHP, Python, etc) or tool (grep, VS Code, Google Analytics, etc) that you are using. Do not post questions asking for an explanation of what a symbol means or what a particular regular expression will match.
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What is the difference in using '?' inside and outside a group? [duplicate]
I am trying to match strings such as the following.
Valid
12345678
12-34-56-87
Invalid
1-234-56-78
12-45-7810
#include<regex>
using namespace std;
int main() {
string s = "";...
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dbt doc block automation with regex in VSCode
I am trying to automate creating dbt doc blocks in markdown file. My issue is when I have more than one model with their own fields, I'm not sure how to automate doc block creation.
So far I have this:...
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Extract substrings from strings that are separated by variable number of spaces [closed]
I'm looking for a regex to extract a part of the string in C# or vb.net.
My string might look like these
"Hello, there is cat on the wall. The lion is in its den."
"The lion is in its ...
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1
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python regex, how to unpack multiple group when group may not exit [closed]
# Code
re_freq = re.compile(r'^(?P<num>\d+)?(?P<freq>\w)')
for input in ['4S', '3W', 'S', 'W']:
print(f'input: {input}:')
num, freq = re_freq.search(input).group()
print(f'. ...
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2
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How to replace variables in a formula with their definitions?
I have the list of variables used, and their corresponding definitions. I also have the formulas provided, but I would like the translation of the formulas (provided in the example) to better ...
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How to extract the class name only by using default toString method and regular expression together? [duplicate]
I used the following :
let s = { x: 1, y: 1 }.toString(); // s == "[object Object]"
console.log(/\b(\w)+]$/.exec(s)[0]);
It gives the output : Object]
How to get rid of closing squre ...
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1
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42
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Regex: split string into sets of chars from a pool
Is there a way to describe a regex splitting a string into sets of chars from a limited pool without duplications? For example we have pool of chars (A, B, and C), so string "AABABCCAB" gets ...
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PHP Notice: Array to string conversion preg_grep Problem
My Code is this
$SQLInjectionRegexOR = '/[\'")]* *[o][r] *.*(.)(.) *= *\\2(?:--)?\\1?/i';
Failure - 1 $suspiciousQueryItemsOR = preg_grep($SQLInjectionRegexOR, $_REQUEST);
if (!empty($...
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1
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55
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Java String split by empty lines including empty lines at the end [closed]
I have seen many questions and answers online, but it seems that I cannot find the case that I have.
String s = "a\nb\n\nc\n\n\n\n";
String[] split = s.split("\\R");
//is the same ...
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1
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48
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Sonarlint refactor this repetition that can lead to stack overflow regex expression [duplicate]
I have to write a java regular expression to find if a string has at least 6 digits in it. The digits may be separated by space, hyphen or other characters.
The java pattern that I wrote "^(?=.(?:...
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2
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36
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Extract sub-string within larger block
Given the following partial file:
[epel]
name=Extra Packages for Enterprise Linux 8 - $basearch
# It is much more secure to use the metalink, but if you wish to use a local mirror
# place its address ...
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2
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1
answer
34
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reg_replace in PostgreSql with pattern matching
I have below dataset,
1. '{SHEET,2730377,SHEET,5708283,DATA,3015937}'
2. '{SHEET,2730377,SHEET,5708283,DATA,3015937,DATA,0010965}'
3. '{SHEET,5708283,DATA,3015937,DATA,0010965}'
3. '{SHEET,5708283,...
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What's the breakdown of the following regex? [duplicate]
^((?!ca-ct.mydomain)(?!ca.mydomain)(?!cats.mydomain).)*mydomain.com$
I got the above expression from a web.config file, it's supposed to filter out anything that contains ca-ct.mydomain or ca....
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55
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What are methods of parsing complex unstructured text from docx file into pandas?
I have a docx file with unstructured text that looks like the following:
docx File
Prep
Northern Kitchen Number One K01-24-01-P01 $132,500
Background:
None
Project Description:
Some long ...
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1
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14
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Regular expression to match image tag with empty source attribute?
I have bunch of files like these
<IMG height=694
src="" width=201>
and I would like to remove all of image tags with empty source attribute.
Which regex I should use to match such ...
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