Recent questions tagged RegEx

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regex - Replace entire strings based on partial match

New to R. Looking to replace the entire string if there is a partial match. d = c("SDS0G2 Blue", " ... in solving this is truly appreciated. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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836 views

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regex - Python re.findall() is not working as expected

I have the code: import re sequence="aabbaa" rexp=re.compile("(aa|bb)+") rexp.findall(sequence) This returns ['aa'] ... 'aa','bb','aa']? Thanks! See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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586 views

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regex - Regular Expression to match a valid day in a date

I need help coming up with a regex to make sure the user enters a valid date The string will be in the format ... The day should not go over 31. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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592 views

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regex - How can I use regular expression to grab an 'img' tag?

I want to grab an img tag from text returned from JSON data like that. I want to grab this from a string: <img class="img ... [^'"]+)['"][^>]*>" See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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744 views

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regex - MySQL | REGEXP VS Like

I have a table CANDIDATE in my db which is running under MySQL 5.5 and I am trying to get rows from ... CANDIDATE c WHERE firstname LIKE'%ram%'; See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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676 views

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regex to remove everything after the last dot in a file

I'm trying to find a regex for removing everything after the last dot in a file. So far I've found ways to ... me on the way? Thanks in advance See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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696 views

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regex - Currency Regular Expression

I think I created a working regular expression for what I need. Just wondering if anyone can break it or ... must be INSIDE the parenthesis. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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596 views

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regex - SED/tr etc.. : How to comment out a line that contains "string" in a file?

my file contains lines such as these: -A INPUT -m state --state NEW -m tcp -p tcp --dport 2000 -j ... the most practical method ? ( fastest ) See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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700 views

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regex - Php parse links/emails

I am wondering if there is a simple snippet which converts links of any kind: http://www.cnn.com to <a href=" ... works but a.cb does not work. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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827 views

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regex - Javascript: Splitting a string by comma but ignoring commas in quotes

I have a string like following var str="A,B,C,E,'F,G,bb',H,'I9,I8',J,K" I'd like to split the string on commas. ... A B C E F,G,bb H I9,I8 J K See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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657 views

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regex - Obtain patterns in one file from another using ack or awk or better way than grep?

Is there a way to obtain patterns in one file (a list of patterns) from another file using ack as the - ... efficient way to complete? Thanks! See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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707 views

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regex - Extract last 4-digit number from a series in R using stringr

I would like to flatten lists extracted from HTML tables. A minimal working example is presented below. The example ... 2003", and "1996". See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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391 views

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regex - What is the Python way of doing a G anchored parsing loop?

What follows is a perl function I wrote years ago. It is a smart tokenizer that recognizes some instances of ... return matcher.findall( s ) See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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724 views

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regex - Find all occurrences of substring in string in Java

I'm trying to find all occurrences of a substring in a string in Java. For example: searching "ababsdfasdfhelloasdf" ... I achieve this in Java? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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560 views

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regex match text in either single or double quote

I want to match strings like: The sentence is 'He said "Hello there"' The sentence is "He said 'Hello ... solve my (seemingly simple) problem. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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542 views

1 answer

regex - Repeatedly extract a line between two delimiters in a text file, Python

I have a text file in the following format: DELIMITER1 extract me extract me extract me DELIMITER2 I'd like ... line_iterator.next() Any ideas? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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610 views

1 answer

regex - regular expression in iOS

I am looking for a regular expression to match the following -100..100:0.01. The meaning of this expression is that ... -100 to 100. Any help ? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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531 views

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regex - How can I delete all /* */ comments from a C source file?

I have a C file which I copied from somewhere else, but it has a lot of comments like below: int matrix[20]; ... using one of sed, awk or perl. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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795 views

1 answer

regex - How to allow only 4 digit numbers in html textbox?

I have tried to restrict users in HTML text box to insert only 4 digit numbers 0-9. I have tried as follows but it ... 1-9]|[1-9]d$" required/> See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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575 views

1 answer

regex - How do I extract HTML img sources with a regular expression?

I need to extract the src element from all image tags in an HTML document. So, the input is an HTML page and ... a faster way to get an answer. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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607 views

1 answer

regex - htaccess compare cookie value and redirect if evaluation returns true/false

I would like somebody to help me with an if-else statement in htaccess. What I want is htaccess to read a ... /rewrite_rule or deny from all. } See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

758 views

1 answer

regex - Javascript conditional regular expression if-then-else

I'm trying to limit the entries to a specific format. If the entry has 5500 or 5100 such as 011-5500-000- ... with the if then else idea? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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978 views

1 answer

regex - Regular Expression for matching a numeric sequence?

Does anyone know of a regular expression for matching on a sequence of four digits? I need a match on ... descending; 1357 shouldn't match. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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488 views

1 answer

regex - JavaScript Split string by multiple occurrences of letters

I am trying to split a string by a single or multiple occurrence of letters. For example: aaabbcapppp, would ... a much more efficient solution. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

574 views

1 answer

regex - How do I delete a matching line, the line above and the one below it, using sed?

I have the following sequence occurring multiple times in a file: yyyy xxxx zzzz I have a regex that matches xxxx. ... I use sed to do this? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

468 views

1 answer

regex - Python: how to determine if a list of words exist in a string

Given a list ["one", "two", "three"], how to determine if each word exist in a specified string? The ... . Maybe I should ask another question. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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496 views

1 answer

regex - Remove the letters between two patterns of strings in R

How can I remove the letters between two specific patterns in R? For instance a= "a#g abcdefgtdkfef_jpg>pple" I ... in stringr but I couldn't See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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541 views

1 answer

regex - Python: find regexp in a file

Have: f = open(...) r = re.compile(...) Need: Find the position (start and end) of a first matching regexp ... File 'f' is expected to be big. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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