Recent questions tagged regex

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regex - Regular Expression Match to test for a valid year

Given a value I want to validate it to check if it is a valid year. My criteria is simple where the ... that only positive integers are allowed? See Question&Answers more detail:os...

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

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458 views

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regex - Java regular expression OR operator

This may be a dumb question, but I couldn't find it anywhere: How can I use the java OR regular expression ... parentheses? e.g: Tel|Phone|Fax See Question&Answers more detail:os...

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

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501 views

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regex - remove all line breaks (enter symbols) from the string using R

How to remove all line breaks (enter symbols) from the string? my_string <- "foo bar baz quux" I've tried gsub ... and line break aren't equal. See Question&Answers more detail:os...

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

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502 views

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regex - Regular Expression Vs. String Parsing

At the risk of open a can of worms and getting negative votes I find myself needing to ask, When should I use ... so far has been great. :) See Question&Answers more detail:os...

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

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regex - How to do CamelCase split in python

What I was trying to achieve, was something like this: >>> camel_case_split("CamelCaseXYZ") ['Camel', 'Case', ... it as the correct 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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738 views

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regex - shell script. how to extract string using regular expressions

I am new to shell scripts. I want to send a http request using curl and then extract some string using regular ... "domain name is" echo $name See Question&Answers more detail:os...

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

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640 views

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regex - How to validate email id in angularJs using ng-pattern

Am trying to validate an Email id field in angularJs using ng-pattern directive. But am new to AngularJs. I need to ... submit"> </form> </body> See Question&Answers more detail:os...

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

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482 views

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regex - Why is sed not recognizing as a tab?

sed "s/(.*)/1/" $filename > $sedTmpFile && mv $sedTmpFile $filename I am expecting this sed script to insert a ... it is inserting a t instead. See Question&Answers more detail:os...

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

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regex - Mass string replace in python?

Say I have a string that looks like this: str = "The &yquick &cbrown &bfox &Yjumps over the &ulazy dog" You ... on StackOverflow. Kudos to you. 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 - How to invert a grep expression

The following grep expression successfully lists all the .exe and .html files in the current directory and sub directories. ... (That is, !=.) See Question&Answers more detail:os...

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

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494 views

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regex - Why do ^ and $ not work as expected?

This puzzled me the last 15 minutes: if ('ab' =~ /^a|b$/) { print 't' } else { print 'f' } print ... two characters 'ab'. But it succeeds. Why? See Question&Answers more detail:os...

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

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943 views

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regex - Regular expression to allow backslash in C#

Can anyone provide me with regex for validating string which only should not allow any special characters except backslash ... 't seem to 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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828 views

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regex - Use gsub remove all string before first white space in R

I have a data frame like this: name weight r apple 0.5 y pear 0.4 y cherry 0.1 g watermelon 5.0 pp ... Can anybody give me a favor? Thank you! See Question&Answers more detail:os...

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

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482 views

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regex - Java String.split() sometimes giving blank strings

I'm making a text based dice roller. It takes in strings like "2d10+5" and returns a string as a result of the ... the array? How can I fix it? See Question&Answers more detail:os...

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

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566 views

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regex - Deprecated: Function split() is deprecated. How to rewrite this statement?

I have the following statement which worked fine before PHP 5.3 using the split function: list($year, $month, ... :58 into its component parts. See Question&Answers more detail:os...

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

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481 views

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regex - Fixing Catastrophic Backtracking in Regular Expression

The Problem I'm using the following regular expression to check for valid file paths: ^(?:[a-zA-Z]:\|\\)([^ ... but I am not sure. Any thoughts? See Question&Answers more detail:os...

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

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495 views

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regex - Split text by columns in PowerShell

I'm a PowerShell novice (Bash is my thing normally) who's currently trying to obtain qwinsta output to show ... would be most 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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559 views

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regex - Allow only [a-z][A-Z][0-9] in string using PHP

How can I get a string that only contains a to z, A to Z, 0 to 9 and some symbols? See Question&Answers more detail:os...

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

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817 views

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regex, extract string NOT between two brackets

OK regex question , how to extract a character NOT between two characters, in this case brackets. I have ... would be greatly 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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638 views

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regex - PHP split string into integer element and string

I have a string say: Order_num = "0982asdlkj" How can I split that into the 2 variables, with the number ... help as specifically as possible! See Question&Answers more detail:os...

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

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633 views

1 answer

regex - How to find a whole word in a string in PHP without accidental matches?

Parsing an array of string commands, I need to know if a string contains a specific keyword. Sounds simple ... am missing something simple here. See Question&Answers more detail:os...

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

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523 views

1 answer

regex - How do I extract query parameters from a URL string in PHP?

Users can input URLs using a HTML form on my website, so they might enter something like this: http://www.example. ... there a way to do this? See Question&Answers more detail:os...

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

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606 views

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regex - Extra backslash needed in PHP regexp pattern

When testing an answer for another user's question I found something I don't understand. The problem was ... these extra backslashes necessary? See Question&Answers more detail:os...

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

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1.2k views

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regex - in R, use gsub to remove all punctuation except period

I am new to R so I hope you can help me. I want to use gsub to remove all punctuation except for ... exempt from the gsub() function? See Question&Answers more detail:os...

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

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515 views

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regex - Does the 'o' modifier for Perl regular expressions still provide any benefit?

It used to be considered beneficial to include the 'o' modifier at the end of Perl regular expressions. The ... // (quoted regex) operator. See Question&Answers more detail:os...

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

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373 views

1 answer

regex - Best way to parse HTML in Javascript

I am having a lot of trouble learning RegExp and coming up with a good algorithm to do this. I have this string ... and advice you can give me. See Question&Answers more detail:os...

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

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618 views

1 answer

regex - javascript unicode emoji regular expressions

i want to replace all emoji in string with icon now i successfully replaced those {:) :D :P :3 <3 XP ... to change any emoji to those character See Question&Answers more detail:os...

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

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783 views

1 answer

regex - Insert a newline character every 64 characters using Python

Using Python I need to insert a newline character into a string every 64 characters. In Perl it's easy: s/(.{ ... a more pythonic way to do it? See Question&Answers more detail:os...

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

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