Recent questions tagged regex

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regex matching alpha character followed by 4 alphanumerics

I need a regex for the following pattern: Total of 5 characters (alpha and numeric, nothing else). first ... A1234 is valid D1234 is invalid See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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851 views

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regex - How to strip leading and trailing quote from string, in Ruby

I want to strip leading and trailing quotes, in Ruby, from a string. The quote character will occur 0 or 1 time. ... "foo,bar foo,bar" foo,bar See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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regex - Sed expression doesn't allow optional grouped string

I'm trying to use the following regex in a sed script but it doesn't work: sed -n '/(www.)?teste/p' ... and I'm doing something very stupid. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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regex - R dplyr filter based on matching search term with first words of any work in select columns

I'm trying to filter words from selected columns based on keywords that start the words in the text of match a ... location of the word. Thanks See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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regex - Replace new line character between double quotes with space

i want to read a data row by row and whereever i find double quote i want to replace new line ... agency requests,Kenneth A Lord,Oncology See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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641 views

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regex - Hive: Usage of Concat in Column Name

I am trying to get data from a table that has column name as: year_2016, year_2017, year_2018 etc. I am not sure ... any way I can do this? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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regex - Regular expression to mask strings using string substitution

I would like to use a regular expression to mask all but the first three alphanumeric characters of each word in ... instead of $2. Thanks! See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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614 views

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regex - how to extract the first number from each string in a vector in R?

I am new to regex in R. Here I have a vector where I am interested in extracting the first occurance of a number in ... age. [1] 34 42 23 27 64 See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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regex - Regular expression to recognize variable declarations in C

I'm working on a regular expression to recognize variable declarations in C and I have got this. [a-zA-Z_][ ... ]* Is there any better solution? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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regex - Split column into multiple columns R

I have a data frame column that I need to split into 3 separate column. Looks like this: I:500-600 I: ... hoped. Any help would be appreciated. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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744 views

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regex - searching matching string pattern from dataframe column in python pandas

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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650 views

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regex - Extracting a number following specific text in R

I have a data frame which contains a column full of text. I need to capture the number (can potentially be any ... me. Many thanks in advance. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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715 views

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regex - regular expression java

I am trying to Take the content between Input, my pattern is not doing the right thing please help. below is ... Required Output: one Two Three See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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958 views

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regex - PHP regular expression to remove tags in HTML document

Say I have the following text ..(content)............. <A HREF="http://foo.com/content" >blah ... the URLs will all be different) Much thanks See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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861 views

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regex - Convert cell array of cells into cell array of strings in MATLAB

Using regexp with tokens on cell array of strings I've got cell array of cells. Here is simplified example: S ... strings in a vectorized form? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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818 views

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regex - Python, Regular Expression Postcode search

I am trying to use regular expressions to find a UK postcode within a string. I have got the regular expression ... get it working. Cheers Eef See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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838 views

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regex - Apache .htacces Rewrite Rule to Remove .php File Extensions

The title explains the basics, now, here comes the problem: I have many files that look like this: <?php ... pages by using the .php ending See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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859 views

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regex - Regular expressions in stored procedures

Can a regular expression be used inside a stored procedure? If it can, how? Can you give some examples of how to do it? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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834 views

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regex - RegExp alternative to negative lookahead match for Google Analytics

I'm setting up some conversion funnels on Google Analytics. One is to analyse traffic going from the main site to ... can do this? Many thanks. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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567 views

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regex - Declaration to make PHP script completely Unicode-friendly

Remembering to do all the stuff you need to do in PHP to get it to work properly with Unicode is far too ... code points it contains, etc). See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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716 views

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regex - PHP Regular Expression - Repeating Match of a Group

I have a string that may look something like this: $r = 'Filed under: <a>Group1</a>, <a>Group2</ ... expression instead of breaking it up. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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851 views

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regex - Atomic groups clarity

Consider this regex. a*b This will fail in case of aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaac This takes 67 steps in ... Do they work differently? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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675 views

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regex - JavaScript String replace - How do you use matched variables in the replacement string?

How do you use the matched variables in the pattern in the replacement string? var regexp = new RegExp('needle', 'ig' ... ="marked">//1</span>') See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.5k views

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regex - using classic asp for regular expression

We have some Classic asp sites, and i'm working on them a lil' bit, and I was wondering how can I write a ... , foo and bar from there? Thanks. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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730 views

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regex - How do I convert mod_rewrite (QSA option) to Nginx equivalent?

I'm looking to convert the following mod_rewrite rule to the Nginx equivalent: RewriteRule ^foo/(.*)$ /bar/index ... the QSA argument to Nginx. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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790 views

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regex - In C/C++ mode in Emacs, change face of code in #if 0...#endif block to comment face

I'm trying to add functionality found in some other code editors to my Emacs configuration, whereby C/C+ ... assistance would be appreciated! See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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856 views

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regex - Create column based on presence of string pattern and ifelse

I would like to fill in a new column with one of two values if a pattern is matched. Here is my data ... 16 voya 530532000 inside Thanks -al See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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767 views

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regex - Faster approach than gsub in r

I'm trying to find out, if there is faster approach than gsub vectorized function in R. I have following data ... . Thanks a lot in forward. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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