I need to split a string based on a character, such as a space (0x20).
The caveat is that I need to ignore the character if it is found
between a pair of some other characters, such as single-quotes. For
example (where _ denotes a space character):
ab_cd_'ef'_'g_h '_i_'j_k_l'
I should get back
ab
cd
ef
g_h
i
j_k_l
I'm sure there is an easy solution to this if you are a regex guru.
As for me, I'm clueless. 9 1439
"Mark Downes" <ma*********@br adycorp.com> wrote in
news:c6******** *************** ***@posting.goo gle.com... I need to split a string based on a character, such as a space (0x20). The caveat is that I need to ignore the character if it is found between a pair of some other characters, such as single-quotes. For example (where _ denotes a space character): ab_cd_'ef'_'g_h '_i_'j_k_l' I should get back ab cd ef g_h i j_k_l
I'm sure there is an easy solution to this if you are a regex guru. As for me, I'm clueless.
This seems to work fine:
([^' ]+)|'([^']+)'
Unfortunately, you'll have to remove the 's manually from the matches, or
query both groupings.
Niki
"Niki Estner" <ni*********@cu be.net> wrote in message news:<ee******* ******@TK2MSFTN GP11.phx.gbl>.. . "Mark Downes" <ma*********@br adycorp.com> wrote in news:c6******** *************** ***@posting.goo gle.com...I need to split a string based on a character, such as a space (0x20). The caveat is that I need to ignore the character if it is found between a pair of some other characters, such as single-quotes. For example (where _ denotes a space character): ab_cd_'ef'_'g_h '_i_'j_k_l' I should get back ab cd ef g_h i j_k_l
I'm sure there is an easy solution to this if you are a regex guru. As for me, I'm clueless.
This seems to work fine: ([^' ]+)|'([^']+)'
Unfortunately, you'll have to remove the 's manually from the matches, or query both groupings.
Niki
How do I use this with the Split method in the Regex class?
Mark
"Mark Downes" <ma*********@br adycorp.com> wrote in
news:c6******** *************** ***@posting.goo gle.com... "Niki Estner" <ni*********@cu be.net> wrote in message news:<ee******* ******@TK2MSFTN GP11.phx.gbl>.. . "Mark Downes" <ma*********@br adycorp.com> wrote in news:c6******** *************** ***@posting.goo gle.com... >I need to split a string based on a character, such as a space (0x20). > The caveat is that I need to ignore the character if it is found > between a pair of some other characters, such as single-quotes. For > example (where _ denotes a space character): > ab_cd_'ef'_'g_h '_i_'j_k_l' > I should get back > ab > cd > ef > g_h > i > j_k_l > > I'm sure there is an easy solution to this if you are a regex guru. > As for me, I'm clueless.
This seems to work fine: ([^' ]+)|'([^']+)'
Unfortunately, you'll have to remove the 's manually from the matches, or query both groupings.
Niki
How do I use this with the Split method in the Regex class?
I don't think you can do what you want with the split method, at least not
in a performant way; You'll have to use Regex.Matches to get a list of all
the matches.
Niki
"Niki Estner" <ni*********@cu be.net> wrote in message news:<uR******* *******@TK2MSFT NGP14.phx.gbl>. .. "Mark Downes" <ma*********@br adycorp.com> wrote in news:c6******** *************** ***@posting.goo gle.com... "Niki Estner" <ni*********@cu be.net> wrote in message news:<ee******* ******@TK2MSFTN GP11.phx.gbl>.. . "Mark Downes" <ma*********@br adycorp.com> wrote in news:c6******** *************** ***@posting.goo gle.com... >I need to split a string based on a character, such as a space (0x20). > The caveat is that I need to ignore the character if it is found > between a pair of some other characters, such as single-quotes. For > example (where _ denotes a space character): > ab_cd_'ef'_'g_h '_i_'j_k_l' > I should get back > ab > cd > ef > g_h > i > j_k_l > > I'm sure there is an easy solution to this if you are a regex guru. > As for me, I'm clueless.
This seems to work fine: ([^' ]+)|'([^']+)'
Unfortunately, you'll have to remove the 's manually from the matches, or query both groupings.
Niki
How do I use this with the Split method in the Regex class?
I don't think you can do what you want with the split method, at least not in a performant way; You'll have to use Regex.Matches to get a list of all the matches.
Niki
Thanks Niki for your help. I'm really close to what I need. The only
thing that I'm missing is that I need the regex expression to work
like the String.Split method where two adjacent delimiters gives back
an empty string and a delimiter at the beginning or end of a string
gives back an empty string.
I'm using the Regex.Matches method like you suggested and I get back
the correct data whenever the aforementioned cases are absent from the
string.
Do you have any advice?
Mark
"Mark Downes" <ma*********@br adycorp.com> wrote in
news:c6******** *************** **@posting.goog le.com... "Niki Estner" <ni*********@cu be.net> wrote in message news:<uR******* *******@TK2MSFT NGP14.phx.gbl>. .. "Mark Downes" <ma*********@br adycorp.com> wrote in news:c6******** *************** ***@posting.goo gle.com... > "Niki Estner" <ni*********@cu be.net> wrote in message > news:<ee******* ******@TK2MSFTN GP11.phx.gbl>.. . >> "Mark Downes" <ma*********@br adycorp.com> wrote in >> news:c6******** *************** ***@posting.goo gle.com... >> >I need to split a string based on a character, such as a space >> >(0x20). >> > The caveat is that I need to ignore the character if it is found >> > between a pair of some other characters, such as single-quotes. For >> > example (where _ denotes a space character): >> > ab_cd_'ef'_'g_h '_i_'j_k_l' >> > I should get back >> > ab >> > cd >> > ef >> > g_h >> > i >> > j_k_l >> > >> > I'm sure there is an easy solution to this if you are a regex guru. >> > As for me, I'm clueless. >> >> This seems to work fine: >> ([^' ]+)|'([^']+)' >> >> Unfortunately, you'll have to remove the 's manually from the matches, >> or >> query both groupings. >> >> Niki > > How do I use this with the Split method in the Regex class?
I don't think you can do what you want with the split method, at least not in a performant way; You'll have to use Regex.Matches to get a list of all the matches.
Niki
Thanks Niki for your help. I'm really close to what I need. The only thing that I'm missing is that I need the regex expression to work like the String.Split method where two adjacent delimiters gives back an empty string and a delimiter at the beginning or end of a string gives back an empty string.
I'm using the Regex.Matches method like you suggested and I get back the correct data whenever the aforementioned cases are absent from the string.
If this doesn't work, please post some sample data that demonstrates your
problem:
([^' ]+)|'([^']*)'
Niki
"Niki Estner" <ni*********@cu be.net> wrote in message news:<#E******* *******@TK2MSFT NGP10.phx.gbl>. .. "Mark Downes" <ma*********@br adycorp.com> wrote in news:c6******** *************** **@posting.goog le.com... "Niki Estner" <ni*********@cu be.net> wrote in message news:<uR******* *******@TK2MSFT NGP14.phx.gbl>. .. "Mark Downes" <ma*********@br adycorp.com> wrote in news:c6******** *************** ***@posting.goo gle.com... > "Niki Estner" <ni*********@cu be.net> wrote in message > news:<ee******* ******@TK2MSFTN GP11.phx.gbl>.. . >> "Mark Downes" <ma*********@br adycorp.com> wrote in >> news:c6******** *************** ***@posting.goo gle.com... >> >I need to split a string based on a character, such as a space >> >(0x20). >> > The caveat is that I need to ignore the character if it is found >> > between a pair of some other characters, such as single-quotes. For >> > example (where _ denotes a space character): >> > ab_cd_'ef'_'g_h '_i_'j_k_l' >> > I should get back >> > ab >> > cd >> > ef >> > g_h >> > i >> > j_k_l >> > >> > I'm sure there is an easy solution to this if you are a regex guru. >> > As for me, I'm clueless. >> >> This seems to work fine: >> ([^' ]+)|'([^']+)' >> >> Unfortunately, you'll have to remove the 's manually from the matches, >> or >> query both groupings. >> >> Niki > > How do I use this with the Split method in the Regex class?
I don't think you can do what you want with the split method, at least not in a performant way; You'll have to use Regex.Matches to get a list of all the matches.
Niki
Thanks Niki for your help. I'm really close to what I need. The only thing that I'm missing is that I need the regex expression to work like the String.Split method where two adjacent delimiters gives back an empty string and a delimiter at the beginning or end of a string gives back an empty string.
I'm using the Regex.Matches method like you suggested and I get back the correct data whenever the aforementioned cases are absent from the string.
If this doesn't work, please post some sample data that demonstrates your problem: ([^' ]+)|'([^']*)'
Niki
Here is an example set of data where I'm trying to split the data from
a comma-delimited string with double-quotes around strings (all one
line, watch out for wraps):
"50-00-0","Formalin",3 ,4,0,,"DANGER", "Corrosive, Flammable","Eye s,
Skin, Respiratory System, Kidney","Goggle s, Fshield, Gloves, Fullsuit,
Boots, ChkResp"
I changed the expression to: ([^\",]+)|\"([^\"]*)\" in CSharp.
For the data, I need to get back the following split data:
"50-00-0"
"Formalin"
3
4
0
<empty string>
"DANGER"
"Corrosive, Flammable"
"Eyes, Skin, Respiratory System, Kidney"
"Goggles, Fshield, Gloves, Fullsuit, Boots, ChkResp"
With the expression I get back all of the correct data, but I'm
missing the empty string where there was no value listed in the data.
Mark
"Mark Downes" <ma*********@br adycorp.com> wrote in
news:c6******** *************** ***@posting.goo gle.com... .... Here is an example set of data where I'm trying to split the data from a comma-delimited string with double-quotes around strings (all one line, watch out for wraps): "50-00-0","Formalin",3 ,4,0,,"DANGER", "Corrosive, Flammable","Eye s, Skin, Respiratory System, Kidney","Goggle s, Fshield, Gloves, Fullsuit, Boots, ChkResp"
I changed the expression to: ([^\",]+)|\"([^\"]*)\" in CSharp. For the data, I need to get back the following split data: "50-00-0" "Formalin" 3 4 0 <empty string> "DANGER" "Corrosive, Flammable" "Eyes, Skin, Respiratory System, Kidney" "Goggles, Fshield, Gloves, Fullsuit, Boots, ChkResp"
With the expression I get back all of the correct data, but I'm missing the empty string where there was no value listed in the data.
The regex engine doesn't like to return empty matches. You can however
include the comma in the match like this:
\G(([^\",]*)|\"([^\"]*)\")\s*(,|$)
And use only the first capture group (to remove the comma).
Does this work?
Niki
"Niki Estner" <ni*********@cu be.net> wrote in message news:<e1******* *******@TK2MSFT NGP10.phx.gbl>. .. "Mark Downes" <ma*********@br adycorp.com> wrote in news:c6******** *************** ***@posting.goo gle.com... .... Here is an example set of data where I'm trying to split the data from a comma-delimited string with double-quotes around strings (all one line, watch out for wraps): "50-00-0","Formalin",3 ,4,0,,"DANGER", "Corrosive, Flammable","Eye s, Skin, Respiratory System, Kidney","Goggle s, Fshield, Gloves, Fullsuit, Boots, ChkResp"
I changed the expression to: ([^\",]+)|\"([^\"]*)\" in CSharp. For the data, I need to get back the following split data: "50-00-0" "Formalin" 3 4 0 <empty string> "DANGER" "Corrosive, Flammable" "Eyes, Skin, Respiratory System, Kidney" "Goggles, Fshield, Gloves, Fullsuit, Boots, ChkResp"
With the expression I get back all of the correct data, but I'm missing the empty string where there was no value listed in the data.
The regex engine doesn't like to return empty matches. You can however include the comma in the match like this: \G(([^\",]*)|\"([^\"]*)\")\s*(,|$) And use only the first capture group (to remove the comma).
Does this work?
Niki
I found a solution to the problem in the article 'Managed Extensions:
Parsing CSV Files with Regular Expressions' at http://www.codeguru.com/Cpp/Cpp/stri...icle.php/c8153
I used it with the Regex.Split method and it worked perfectly. The
regular expression is ",(?=(?:[^\"]*\"[^\"]*\")*(?![^\"]*\"))".
Thanks for all of your help Niki!
Mark
"Mark Downes" <ma*********@br adycorp.com> wrote in
news:c6******** *************** ***@posting.goo gle.com... ... I found a solution to the problem in the article 'Managed Extensions: Parsing CSV Files with Regular Expressions' at http://www.codeguru.com/Cpp/Cpp/stri...icle.php/c8153
I used it with the Regex.Split method and it worked perfectly. The regular expression is ",(?=(?:[^\"]*\"[^\"]*\")*(?![^\"]*\"))".
Note that:
a) this will have to scan the rest of the string after each comma, so it has
O(n²) performance - bad for long strings of data, and
b) it will only work correctly on a well-formed input string
If your input strings are short, and always well-formed (i.e. even number or
"'s), it should work fine!
Niki This thread has been closed and replies have been disabled. Please start a new discussion. Similar topics |
by: Bradley Plett |
last post by:
I'm hopeless at regular expressions (I just don't use them often
enough to gain/maintain knowledge), but I need one now and am looking
for help. I need to parse through a document to find a URL, and then
reconstruct another URL based on it. For example, I need to scan a
web page looking for something like <a
href="some_dir/list_20050815100225.csv">. I don't know in advance
what the date/time in the file name will be. I need to take the...
|
by: Neri |
last post by:
Some document processing program I write has to deal with documents
that have headers and footers that are unnecessary for the main
processing part. Therefore, I'm using a regular expression to go over
each document, find out if it contains a header and/or a footer and
extract only the main content part.
The headers and the footers have no specific format and I have to
detect and remove them using a list of strings that may appear as...
|
by: Lee Kuhn |
last post by:
I am trying the create a regular expression that will essentially match
characters in the middle of a fixed-length string. The string may be any
characters, but will always be the same length. In other words, as the
regular expression (....)($) matches the "4567" in the string "1234567", how
would I create a similar regular expression that only matches the "45" in
the same string. The same regular expression would match "32" in the string...
|
by: James D. Marshall |
last post by:
The issue at hand, I believe is my comprehension of using regular
expression, specially to assist in replacing the expression with other text.
using regular expression (\s*) my understanding is that this will one or
more occurrences to replace all the white space between with a comma.
This search
ElseIf InStr(1, indivline, "$") Then
insert a replace statement that uses the regular expression to find and
replace all the white space...
|
by: Billa |
last post by:
Hi,
I am replaceing a big string using different regular expressions (see
some example at the end of the message). The problem is whenever I
apply a "replace" it makes a new copy of string and I want to avoid
that. My question here is if there is a way to pass either a memory
stream or array of "find", "replace" expressions or any other way to
avoid multiple copies of a string.
Any help will be highly appreciated
| |
by: Pete Davis |
last post by:
I'm using regular expressions to extract some data and some links from some
web pages. I download the page and then I want to get a list of certain
links.
For building regular expressions, I use an app call The Regulator, which
makes it pretty easy to build and test regular expressions.
As a warning, I'm real weak with regular expressions. Let's say my regular
expression is:
|
by: Zach |
last post by:
Hello,
Please forgive if this is not the most appropriate newsgroup for this
question. Unfortunately I didn't find a newsgroup specific to regular
expressions.
I have the following regular expression.
^(.+?) uses (?!a spoon)\.$
|
by: Mike |
last post by:
I have a regular expression (^(.+)(?=\s*).*\1 ) that results in
matches. I would like to get what the actual regular expression is.
In other words, when I apply ^(.+)(?=\s*).*\1 to " HEART (CONDUCTION
DEFECT) 37.33/2 HEART (CONDUCTION DEFECT) WITH
CATHETER 37.34/2 " the expression is "HEART (CONDUCTION DEFECT)". How
do I gain access to the expression (not the matches) at runtime?
Thanks,
Mike
|
by: Mr.Steskal |
last post by:
Posted: Wed Jul 11, 2007 7:01 am Post subject: Regular Expression
Help
--------------------------------------------------------------------------------
I need help writing a regular expression that only returns part of a
string.
For Example I have a multi-line text fragment like below:
|
by: Lit |
last post by:
Hi,
I am looking for a Regular expression for a password for my RegExp
ValidationControl
Requirements are,
At least 8 characters long.
At least one digit
At least one upper case character
|
by: Hystou |
last post by:
Most computers default to English, but sometimes we require a different language, especially when relocating. Forgot to request a specific language before your computer shipped? No problem! You can effortlessly switch the default language on Windows 10 without reinstalling. I'll walk you through it.
First, let's disable language synchronization. With a Microsoft account, language settings sync across devices. To prevent any complications,...
| |
by: Oralloy |
last post by:
Hello folks,
I am unable to find appropriate documentation on the type promotion of bit-fields when using the generalised comparison operator "<=>".
The problem is that using the GNU compilers, it seems that the internal comparison operator "<=>" tries to promote arguments from unsigned to signed.
This is as boiled down as I can make it.
Here is my compilation command:
g++-12 -std=c++20 -Wnarrowing bit_field.cpp
Here is the code in...
|
by: Hystou |
last post by:
Overview:
Windows 11 and 10 have less user interface control over operating system update behaviour than previous versions of Windows. In Windows 11 and 10, there is no way to turn off the Windows Update option using the Control Panel or Settings app; it automatically checks for updates and installs any it finds, whether you like it or not. For most users, this new feature is actually very convenient. If you want to control the update process,...
|
by: tracyyun |
last post by:
Dear forum friends,
With the development of smart home technology, a variety of wireless communication protocols have appeared on the market, such as Zigbee, Z-Wave, Wi-Fi, Bluetooth, etc. Each protocol has its own unique characteristics and advantages, but as a user who is planning to build a smart home system, I am a bit confused by the choice of these technologies. I'm particularly interested in Zigbee because I've heard it does some...
|
by: agi2029 |
last post by:
Let's talk about the concept of autonomous AI software engineers and no-code agents. These AIs are designed to manage the entire lifecycle of a software development project—planning, coding, testing, and deployment—without human intervention. Imagine an AI that can take a project description, break it down, write the code, debug it, and then launch it, all on its own....
Now, this would greatly impact the work of software developers. The idea...
|
by: isladogs |
last post by:
The next Access Europe User Group meeting will be on Wednesday 1 May 2024 starting at 18:00 UK time (6PM UTC+1) and finishing by 19:30 (7.30PM).
In this session, we are pleased to welcome a new presenter, Adolph Dupré who will be discussing some powerful techniques for using class modules.
He will explain when you may want to use classes instead of User Defined Types (UDT). For example, to manage the data in unbound forms.
Adolph will...
|
by: TSSRALBI |
last post by:
Hello
I'm a network technician in training and I need your help.
I am currently learning how to create and manage the different types of VPNs and I have a question about LAN-to-LAN VPNs.
The last exercise I practiced was to create a LAN-to-LAN VPN between two Pfsense firewalls, by using IPSEC protocols.
I succeeded, with both firewalls in the same network. But I'm wondering if it's possible to do the same thing, with 2 Pfsense firewalls...
| |
by: 6302768590 |
last post by:
Hai team
i want code for transfer the data from one system to another through IP address by using C# our system has to for every 5mins then we have to update the data what the data is updated we have to send another system
|
by: bsmnconsultancy |
last post by:
In today's digital era, a well-designed website is crucial for businesses looking to succeed. Whether you're a small business owner or a large corporation in Toronto, having a strong online presence can significantly impact your brand's success. BSMN Consultancy, a leader in Website Development in Toronto offers valuable insights into creating effective websites that not only look great but also perform exceptionally well. In this comprehensive...
| |