Solved

Regular expression

Posted on 2006-07-23
7
344 Views
Last Modified: 2010-04-17
How do I do a regular exp which will  contain:

hello in either lower or uppercase
or byebye in either lower or uppercase

both can have any prefix or suffix
0
Comment
Question by:noam_dz
7 Comments
 
LVL 25

Accepted Solution

by:
InteractiveMind earned 100 total points
ID: 17163088
Like this?

([hH][eE][lL][lL][oO])|([bB][yY][eE][bB][yY][eE])
0
 
LVL 25

Expert Comment

by:InteractiveMind
ID: 17163094
What language are you using however?

Because you could simplify that down to:

(hello)|(byebye)

And specify case insensitivty to the regex compiler.
0
 
LVL 25

Expert Comment

by:InteractiveMind
ID: 17163105
Hmm.. Unless you mean that the entire string must be in either lower case or upper case, rather than potentially a mix of both?

In which case, you could do this:

(hello)|(HELLO)|(byebye)|(BYEBYE)
0
3 Use Cases for Connected Systems

Our Dev teams are like yours. They’re continually cranking out code for new features/bugs fixes, testing, deploying, testing some more, responding to production monitoring events and more. It’s complex. So, we thought you’d like to see what’s working for us.

 
LVL 65

Assisted Solution

by:rockiroads
rockiroads earned 100 total points
ID: 17163285
something I picked up in perl earlier

(h|H)|(e|E)|(l|L)|(l|L)|(o|O)


http://www.experts-exchange.com/Programming/Programming_Languages/Perl/Q_21921631.html


0
 
LVL 9

Assisted Solution

by:owenli27
owenli27 earned 100 total points
ID: 17165221
In Java:
Pattern ptrnForm = Pattern.compile("([.\\s]*?hello[.\\s]*?)|([.\\s]*?byebye[.\\s]*?)", Pattern.CASE_INSENSITIVE);

In Perl:
if( $str =~ /(hello)|(byebye)/i )
0
 
LVL 7

Assisted Solution

by:Anandhi K
Anandhi K earned 100 total points
ID: 17165816
Regex.IsMatch(Value,"(/.*?[hello|byebye]?/.*/i)", RegexOptions.IgnoreCase);


In regular expressions, a period can stand for any character. Using a period in a pattern is a way of requiring that "something" occurs here, without having to decide what. (because both can have any prefix or suffix)

the asterisk ("*") is any number of

question-mark ("?") means occurs exactly once

Advanced -- i - Case-insensitive match


Can avoid /i in case of using RegexOptions.IgnoreCase.
0
 
LVL 84

Assisted Solution

by:ozo
ozo earned 100 total points
ID: 17165851
You don't need the () in
if( $str =~ /hello|byebye/i )
unless you also want to capture the match, which you can do with
if( $str =~ /(hello|byebye)/i )
But note that these would also match $str = "phellodendron"



0

Featured Post

Netscaler Common Configuration How To guides

If you use NetScaler you will want to see these guides. The NetScaler How To Guides show administrators how to get NetScaler up and configured by providing instructions for common scenarios and some not so common ones.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
regex code to filter this thip of combo email 42 65
regex expression 9 60
How to get time difference in minutes and seconds only between 2 dates 2 41
Help Required 2 32
This article is meant to give a basic understanding of how to use R Sweave as a way to merge LaTeX and R code seamlessly into one presentable document.
Although it can be difficult to imagine, someday your child will have a career of his or her own. He or she will likely start a family, buy a home and start having their own children. So, while being a kid is still extremely important, it’s also …
With the power of JIRA, there's an unlimited number of ways you can customize it, use it and benefit from it. With that in mind, there's bound to be things that I wasn't able to cover in this course. With this summary we'll look at some places to go…
In this seventh video of the Xpdf series, we discuss and demonstrate the PDFfonts utility, which lists all the fonts used in a PDF file. It does this via a command line interface, making it suitable for use in programs, scripts, batch files — any pl…

772 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question