Recent questions tagged RegEx

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regex - Why do these three regexes have different step counts?

In an answer to a recent question, I contrived a couple of clever little regexes (at the asker's request) to ... why is the third so efficient? See Question&Answers more detail:os...

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

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688 views

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regex - Regular expression test can't decide between true and false (JavaScript)

I get this behavior in both Chrome (Developer Tools) and Firefox (Firebug). Note the regex test returns ... Can anyone explain this behavior? See Question&Answers more detail:os...

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

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1.3k views

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regex - How to split a string by comma ignoring comma in double quotes

This question has been asked before but I have been trying to work a solution in powershell but ... $csvSplit, $RegexOptions::ExplicitCapture) See Question&Answers more detail:os...

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

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708 views

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regex - Bash: loop through files that DO NOT match extension

I'm writing a bash script that needs to loop files inside a directory that do not match a specific ... not match the specified extension? See Question&Answers more detail:os...

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

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672 views

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regex - How to escape “” characters in python

i am very new to regular expression and trying get "" character using python normally i can escape "" like ... ] can someone please explain why See Question&Answers more detail:os...

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

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1.1k views

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regex - Python regular expression to filter list of strings matching a pattern

I use R a lot more and it is easier for me to do it in R: > test <- c('bbb', 'ccc', ... exercise. And I prefer using regression expression. See Question&Answers more detail:os...

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

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799 views

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regex - Splitting a math expression string into tokens in Python

I have a lot of python strings such as "A7*4", "Z3+8", "B6 / 11", and I want to split these strings so that they ... get back ["B6", "/", "11"]. See Question&Answers more detail:os...

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

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832 views

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regex - Chronic ripgrep / vim Plugin Error on Load: "-complete Used Without -nargs"?

I recently added ripgrep to my list of vim plugins and, immediately after installation, I began receiving this error ... how did you resolve 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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529 views

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regex - Confused with the locale settings in R

Just now I answered this Removing characters after a EURO symbol in R question. But it's not working for me ... encoding to utf-8 on Windows? See Question&Answers more detail:os...

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

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732 views

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regex - R Regular Expression Lookbehind

I have a vector filled with strings of the following format: <year1><year2><id1><id2> the first ... not handle lookaheads and lookbehinds? See Question&Answers more detail:os...

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

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570 views

1 answer

regex - How to parse multi line records (with awk?)

I'm trying to figure out how to extract particular fields from multi line records separated by . In this ... how to better leverage awk. See Question&Answers more detail:os...

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

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809 views

1 answer

regex - conditionally remove leading or trailing `.` character in R

I have a vector of names where some names have leading and trailing . characters, and some do not. Here is an example: ... ','name.2','name.3') See Question&Answers more detail:os...

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

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735 views

1 answer

regex - Levenshtein distance in regular expression

Is it possible to include Levenshtein distance in a regular expression query? (Except by making union between ... larger Levenshtein distances.) See Question&Answers more detail:os...

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

0 votes

687 views

1 answer

regex - javascript - Better Way to Escape Dollar Signs in the String Used By String.prototype.replace

I want to replace a string by another. I found when the replaceValue contains "$", the replace will fail. So I ... any better way to 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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888 views

1 answer

regex - How to escape a question mark in R?

I am trying to grep a vector of strings and some of them contain question marks. I am doing: grep('?', ... the proper escaping procedure for '?' See Question&Answers more detail:os...

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

0 votes

781 views

1 answer

regex for integer or floating point number with two decimals

I want to validate my currency field with regex. I want to allow the following pattern entries 1.23 1 .45 0.56 ... +)? allows all but third one. See Question&Answers more detail:os...

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

0 votes

755 views

1 answer

regex - Efficiently removing specific characters (some punctuation) from Strings in Java?

In Java, what is the most efficient way of removing given characters from a String? Currently, I have this code: ... as this is a common task. See Question&Answers more detail:os...

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

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933 views

1 answer

regex - Using sed to search and replace an ip address in a file

Been trying to get this working for a while and not really quite getting it. Basically, I have a file with an ... would be awesome! Thanks :) See Question&Answers more detail:os...

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

0 votes

931 views

1 answer

regex - sed error "Invalid range end"

I run this substitution command on Ubuntu 12.04. $ sed -e "s/([a-zA-Z0-9.-/\ :]+)/1/g" ... MacOSX. Can you describe why the command fails? See Question&Answers more detail:os...

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

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577 views

1 answer

regex - perl6 grammar , not sure about some syntax in an example

I am still learning perl6, and I am reading the example on grammar from this page: http://examples.perl6.org/ ... I think this is a function; See Question&Answers more detail:os...

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

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1.4k views

1 answer

regex - Regular expression in JavaScript - Replace Image src attribute

In JavaScript I have a string containing a DOM fragment. How would I find and replace the src attribute of an ... src='newPath/name.jpg' /> See Question&Answers more detail:os...

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

0 votes

643 views

1 answer

regex - simple .htaccess redirect : how to redirect with parameters?

My goal is simply to redirect: /jsn.php?parameters to http://www.site2.com/jsn.php?parameters I tried with ... ://www.site2.com/jsn.php$1 See Question&Answers more detail:os...

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

0 votes

671 views

1 answer

regex - What do these special characters mean in Java?

I was looking at some of the jdk code. I found these characters. Could someone explain to me what do these mean. ... quote() method from jdk 1.6 See Question&Answers more detail:os...

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

0 votes

929 views

1 answer

regex - how to remove brackets character in string (java)

I want to remove all type of brackets character (example: [],(),{}) in string by using java. I tried using ... 's not working, help me please. See Question&Answers more detail:os...

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

0 votes

854 views

1 answer

regex - How to redirect %20 or White space automatically to + or - with htaccess?

I need to redirect automatically lots of url like /file%20name/ ore /file name/ to /file+name/ or /file-name/. How can I do this with .htacess ? See Question&Answers more detail:os...

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

0 votes

628 views

1 answer

regex - JavaScript RegExp match text ignoring HTML

Is it possible to match "the dog is really really fat" in "The <strong>dog</strong> is really <em>really</em ... "the dog is really really fat." See Question&Answers more detail:os...

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

0 votes

832 views

1 answer

regex - PHP preg_match bible scripture format

I am struggling with building a regular expression for parsing this kind of strings (bible scriptures): 'John 14 ... and verse is optional. See Question&Answers more detail:os...

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

0 votes

713 views

1 answer

regex - R remove first character from string

I can remove the last character from a string: listfruit <- c("aapplea","bbananab","oranggeo") gsub('.{1}$ ... would be grateful for your help. See Question&Answers more detail:os...

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

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