Regular Expressions and variables OR RegExp and var

Sorry about that, my browser hiccuped and sent three
times....

Newlines are only a problem if you're reading the
text line-by-line and applying the regexp to each
line. It wouldn't catch expressions that span
lines.
@sabre150: your note re: CharSequence -- so what
you're suggesting is to implement a CharSequence that
wraps the file contents, and then use the regexps on
the whole thing? I like the idea but it seems like
it would only be easy to implement if the file uses a
fixed-width character set. Or am I missing
something...?You are correct for the most basic implementation. It is very easy to create a char sequence for fixed width character sets using RandomAccessFile. Once you go to character sets such as UTF-8 then more effort is required.
While ever the regex is moving forward thought the CharSequence one char at a time there is no problem because one can wrap a Reader but once it backtracks then one needs random access and one will need to have a buffer. I have used a ring buffer for this which seems to work OK but of course this will not allow the regex to move to any point in the CharSequence.
'uncle_alice' is the regex king round here so listen to him.
:-( I should read further ahead next time!
Message was edited by:
sabre150
Message was edited by:
sabre150

Similar Messages

Regular Expression Character Sets with Pattern and Matcher

Hi,
I am a little bit confused about a regular expressions I am writing, it works in other languages but not in Java.
The regular expressions is to match LaTeX commands from a file, and is as follows:
\\begin{command}([.|\n\r\s]*)\\end{command}
This does not work in Java but does in PHP, C, etc...
The part that is strange is the . character. If placed as .* it works but if placed as [.]* it doesnt. Does this mean that . cannot be placed in a character range in Java?
Any help very much appreciated.
Kind Regards
Paul Bain

In PHP it seems that the "." still works as a all character operator inside character classes.
The regular expression posted did not work, but it does if I do:
\\begin{command}((.|[\n\r\s])*)?\\end{command}
Basically what I'm trying to match is a block of LaTeX, so the \\begin{command} and \\end{command} in LaTeX, not regex, although the \\ is a single one in LaTeX. I basically want to match any block which starts with one of those and ends in the end command. so really the regular expression that counts is the bit in the middle, ((.|[\n\r\s])*)?
Am I right it saying that the "?" will prevent the engine matching the first and last \\bein and \\end in the following example:
\\begin{command}
some stuff
\\end{command}
\\begin{command}
some stuff
\\end{command}

Regular expression technique needed to eliminate " and replace with \"

I am trying to figure out the best way to fix data coming from a database table through the use of ColdFusion, in which there are some quotation marks that JavaScript Flash doesn't want in the array before adding the text content to a quiz.
At the moment, if there are any quotation marks in the elements of the array, even though each element is surrounded by quotation marks, I have to add a backslash to escape them.
I was wondering what would be the regular expression to use to do this, not for the quotation marks surrounding each element, but for those used inside of them.
For example,
["08 Working with Flash Forms_16",
"The syntax for the submit button was .",
"name="submit" type="submit"",
"name="submit"action="submit"",
"id="submit" type="submit"",
"id="submit"action="submit"",
"No, name="submit" type="submit" is correct.",
"true",
"false",
"false",
"false",
"897"] ,
is an example of an element created that has quotation marks inside of the quotation marks for each element.
I am debating about handling this either with XML by writing code to do that with ColdFusion instead of using the code I generated with ColdFusion to create this.
I am also debating about writing the regular expression in a way that I could use it from either ActionScript 2 or 3.0, going at it at the file level maybe.
At the moment I am opening the file and experimenting with writing a Find expression that uses regular expression to select what I want to change before changing it.

Hi,
In excel menu Tools->macro
Enter the macro name say SAPBEXonRefresh
click 'create', will go to visual basic editor
To display '#' as '', paste the following code
Sub SAPBEXonRefresh(queryID As String, resultArea As Range)
Dim c As Range
For Each c In resultArea.Cells
If c.Value = "#" Then c.Value = ""
Next c
End Sub
Close the editor and click on refresh again.
Thanks..
Shambhu

Communicate large number of parameters and variables between Verstand and Labview Model

We have a dyno setup with a PXI-E chassis running Veristand 2014 and Inertia 2014. In order to enhance capabilities and timing of Veristand, I would like to use Labview models to perform tasks not possible by Veristand and Inertia. An example of this is to determine the maximum of a large number of thermocouples. Veristand has a compare funtion, but it compares only two values at a time. This makes for some lengthy and inflexible programming. Labview, on the other hand, has a function which aloows one to get the maximum of elements in an array in a single step. To use Labview I need to "send" the 50 or so thermocouples to the Labview model. In addition to the variables which need to be communicated between Veristand and Labview, I also need to present Labview with the threshold and confguration parameters. From the forums and user manuaIs understand that one has to use the connector pane in Labview and mapping in Veristand System Explorer to expose the inports and outports. The problem is that the Labview connector pane is limited to 27 I/O. How do I overcome that limitation?
BTW. I am fairly new to Labview and Versitand.
Thank you.
Richard
Solved!
Go to Solution.

@Jarrod:
Thank you for the help. I created a simple test model and now understand how I can use clusters for a large number of variables. Regarding the mapping process: Can one map a folder of user channels to a cluster (one-step mapping)? Alternatively, I understand one can import a mapping (text) file in System Explorer. Is this import partial or does it replace all the mapping? The reason I am asking is that, if it is partial, then I can have separate mapping files for different configurations and my final mapping can be a combination of imported mapping files.
@SteveK:
Thank you for the hint on using a Custom Device. I understand that the Custom Device will be much more powerful and can be more generic. The problem at this stage is that my limitations in programming in Labview is far gretater than Labview models' limitations in Veristand. I'll definitely consider the Custom Device route once I am more provicient with LabView. Hopefully I'll be able to re-use some of the VI's I created for the LabView models.
Thanks
Richard

[DW CC] Regular Expression and Back Reference in "Replace with": Escape

I have a problem with escaping a character in "Replace with".
Let's assume the following situation:
Content:
foobar
Search for:
(foo)(bar)
Replace by:
$1zot$2
Result:
foozotbar
Everything is fine.
But I want to insert the number "2" in between foo and bar.
When I use
Replace by: $12$2
The result is:
$12$2
It seems that the regex engine interpretes the "$12" as a whole. And because there's no back reference with the count "12" DW cannot work correctly.
The question:
How can I "escape" the "2"?
Thanks.

Dreamweaver uses JavaScript for its Find and Replace with regex.
I've just checked the Regular Expressions Cookbook by Jan Goyvaerts and Steven Levithan (O'Reilly). It deals with exactly this sort of situation where capturing groups can be ambiguous. This is what it says:
"Java and JavaScript try to be clever with $10 [and above]. If a capturing group with the two-digit number exists in your regular expresssion, both digits are used for the capturing group. If fewer capturing groups exist, only the first digit is used to reference the group, leaving the second as a literal. Thus $23 is the 23rd capturing group, if it exists. Otherwise, it is the second capturing group followed by a literal 3."
In other words, there is no way to escape the 2 in the Replace field. It would appear there's a bug in Dreamweaver's use of capturing groups.

"Match Regular Expression" and "Match Pattern" vi's behave differently

Hi,
I have a simple string matching need and by experimenting found that the "Match Regular Expression" and "Match Pattern" vi's behave somewhat differently. I'd assume that the regular expression inputs on both would behave the same. A difference I've discovered is that the "|" character (the "vertical bar" character, commonly used as an "or" operator) is recognized as such in the Match Regular Expression vi, but not in the Match Pattern vi (where it is taken literally). Furthermore, I cannot find any documentation in Help (on-line or in LabVIEW) about the "|" character usage in regular expressions. Is this documented anywhere?
For example, suppose I want to match any of the following 4 words: "The" or "quick" or "brown" or "fox". The regular expression "The|quick|brown|fox" (without the quotes) works for the Match Regular Expression vi but not the Match Pattern vi. Below is a picture of the block diagram and the front panel results:
The Help says that the Match Regular Expression vi performs somewhat slower than the Match Pattern vi, so I started with the latter. But since it doesn't work for me, I'll use the former. But does anyone have any idea of the speed difference? I'd assume it is negligible in such a simple example.
Thanks!
Solved!
Go to Solution.

Yep-
You hit a point that's frustrated me a time or two as well (and incidentally, caused some hair-pulling that I can ill afford)
The hint is in the help file:
for Match regular expression "The Match Regular Expression function gives you more options for matching
strings but performs more slowly than the Match Pattern function....Use regular
expressions in this function to refine searches....
Characters to Find
Regular Expression
VOLTS
VOLTS
A plus sign or a minus sign
[+-]
A sequence of one or more digits
[0-9]+
Zero or more spaces
\s* or * (that is, a space followed by an asterisk)
One or more spaces, tabs, new lines, or carriage returns
[\t \r \n \s]+
One or more characters other than digits
[^0-9]+
The word Level only if it
appears at the beginning of the string
^Level
The word Volts only if it
appears at the end of the string
Volts$
The longest string within parentheses
The first string within parentheses but not containing any
parentheses within it
$[^()]*$
A left bracket
A right bracket
cat, cag, cot, cog, dat, dag, dot, and dag
[cd][ao][tg]
cat or dog
cat|dog
dog, cat
dog, cat cat dog,cat
cat cat dog, and so on
((cat )*dog)
One or more of the letter a
followed by a space and the same number of the letter a, that is, a a, aa aa, aaa aaa, and so
on
(a+) \1
For Match Pattern "This function is similar to the Search and Replace
Pattern VI. The Match Pattern function gives you fewer options for matching
strings but performs more quickly than the Match Regular Expression
function. For example, the Match Pattern function does not support the
parenthesis or vertical bar (|) characters.
Characters to Find
Regular Expression
VOLTS
VOLTS
All uppercase and lowercase versions of volts, that is, VOLTS, Volts, volts, and so on
[Vv][Oo][Ll][Tt][Ss]
A space, a plus sign, or a minus sign
[+-]
A sequence of one or more digits
[0-9]+
Zero or more spaces
\s* or * (that is, a space followed by an asterisk)
One or more spaces, tabs, new lines, or carriage returns
[\t \r \n \s]+
One or more characters other than digits
[~0-9]+
The word Level only if it begins
at the offset position in the string
^Level
The word Volts only if it
appears at the end of the string
Volts$
The longest string within parentheses
The longest string within parentheses but not containing any
parentheses within it
([~()]*)
A left bracket
A right bracket
cat, dog, cot, dot, cog, and so on.
[cd][ao][tg]
Frustrating- but still managable.
Jeff

Regular Expressions in CS5.5 - something is wrong

Hello Everybody,
Please correct me, but I think, I found a serious problem with regular Expressions in Indesign CS5.5 (and possibly in other apps from CS5.5).
Let's start with simple example:
var range = "a-a,a,a-a,a";
var regEx = /(a+-a+|a+)(,(a+-a+|a+))*/;
alert( "Match:" +regEx.test(range)+"\nLeftContext: "+RegExp.leftContext+"\nRightContext: "+RegExp.rightContext );
What I expected was true match and the left and the right context should be empty. In Indesign CS3 that is correct BUT NOT in CS5.5.
In CS 5.5 it seems that the only first "a-a" is matched and the rest is return as the rightContext - looks like big change (if not parsing error in RegExp engine).
Please correct me if I am wrong.
The second example - how to freeze ID CS5.5:
var range = "a-a,a,a-a,a";
var regEx = /(a+-a+|a+)(,(a+-a+|a+)){8,}/;
alert( "Match:" +regEx.test(range)+"\nLeftContext: "+RegExp.leftContext+"\nRightContext: "+RegExp.rightContext );
As you can see it differs only with the {8,} part instead of *
Run it in CS5.5 and you will see that the ID hangs (in CS3 of course it runs flawlessly}.
The third example - how to freeze ID 5.5 in one line (I posted it earlier in Photoshop forum because similiar problem was called earlier):
alert((/(n|s)? /gmi).test('s') );
As you can guess - it freezes the CS5.5 (CS3 passes the test).
Please correct me if I am doing something wrong or it's the problem of Adobe.
Best regards,
Daniel Brylak

Hi Daniel,
Thanks for sharing. Really annoying indeed.
Just to complete your diagnosis, what you describe about CS.5 is the same in CS5, while CS4 behaves as CS3.
var range = "aaaaa";
var regEx = /(a+-a+|a+)(,(a+-a+|a+))*/;
alert([
    "Match:" +regEx.test(range),
    "LeftContext: "+RegExp.leftContext.toSource(),        // => CS3/4: EMPTY -- CS5+: EMPTY
    "RightContext: "+RegExp.rightContext.toSource()        // => CS3/4: EMPTY -- CS5+: ",a,a-a,a"
    ].join('\r'));
So there is a serious implementation problem of the RegExp object from ExtendScript CS5.
I don't think it's related to the greedy modes. By default, JS RegExp quantifiers are greedy, and /a*/ still entirely captures "aaaaaa" in CS5+.
By the way, you can make any quantifier non-greedy by adding ? after the quantifier, e.g.: /a*?/, /a+?/, etc.
I guess that Adobe ExtendScript has a generic issue in updating the RegExp.lastIndex property in certain contexts—see http://forums.adobe.com/message/3719879#3719879 —which could explain several bugs such as the Negative Class bug —see http://forums.adobe.com/message/3510078#3510078 — or the problems you are mentioning today.
@+
Marc

Email Regular Expression with a String.Match()

I'm currently using a RichTextEditor for a user to build HTML
for a site. However, I want the application to scan for emails and
encode them so they are protected from spam bots when they go to
the live site. I've written a regular expression to find an email
and it seems to work, but it only returns one email at a time from
the string. I have had to revert to a while loop to traverse the
string until I'm satisfied. I don't particularly like that method
and would like to just do one String.match() query to retrieve all
of the emails. Can anyone see something here that I'm missing?

Try adding the global flag (g):
var emailPattern:RegExp =
/[a-z][\w.-]+@\w[\w.-]+\.[\w.-]*[a-z][a-z]+/g;
TS

Regular Expressions in Oracle

Hello All,
I come from Perl scripting language background. Perl's regular expressions are rock solid, robust and very fast.
Now I am planning to master Regular Expressions in Oracle.
Could someone please point the correct place to start with it like official Oracle documentation on Regular Expressions, any good book on Regex or may be any online link etc.
Cheers,
Parag
Edited by: Parag Kalra on Dec 19, 2009 11:03 AM

Hi, Parag,
Look under [R in the index of the SQL language manual|http://download.oracle.com/docs/cd/B28359_01/server.111/b28286/index.htm#R]. All the regular expression functions and operators start with "REGEXP", and there are a couple of entries under "regular expressions".
That applies to the Oracle 11 and 10.2 documentation. Regular expressions were hidden in the Oracle 10.1 SQL Language manual; you had to look up some similar function (like REGR_SYY, itself hidden under S for "SQL Functions", and then step through the pages one at a time.
Sorry, I don't know a good tutorial or introduction.
If you find something hopeful, please post a reference here. I think a lot of people would be interrested.

Problems with java regular expressions

Hi everybody,
Could someone please help me sort out an issue with Java regular expressions? I have been using regular expressions in Python for years and I cannot figure out how to do what I am trying to do in Java.
For example, I have this code in java:
import java.util.regex.*;
String text = "abc";
          Pattern p = Pattern.compile("(a)b(c)");
          Matcher m = p.matcher(text);
if (m.matches())
               int count = m.groupCount();
               System.out.println("Groups found " + String.valueOf(count) );
               for (int i = 0; i < count; i++)
                    System.out.println("group " + String.valueOf(i) + " " + m.group(i));
My expectation is that group 0 would capture "abc", group 1 - "a" and group 2 - "c". Yet, I I get this:
Groups found 2
group 0 abc
group 1 a
I have tried other patterns and input text but the issue remains the same: no matter what, I cannot capture any paranthesized expression found in the pattern except for the first one. I tried the same example with Jakarta Regexp 1.5 and that works without any problems, I get what I expect.
I am using Java 1.5.0 on Mac OS X 10.4.
Thank to all who can help.

paulcw wrote:
If the group count is X, then there are X plus one groups to go through: 0 for the whole match, then 1 through X for the individual groups.It does seem confusing that the designers chose to exclude the zero-group from group count, but the documentation is clear.
Matcher.groupCount():
Group zero denotes the entire pattern by convention. It is not included in this count.

Email validation using Regular Expression.

Hi,
I am in need of using a regular expression for email valiatino. ^[a-z0-9!#$%&'*+/=?^_`{|}~-]+(?:\.[a-z0-9!#$%&'*+/=?^_`{|}~-]+)*@(?:[a-z0-9](?:[a-z0-9-]*[a-z0-9])?\.)+(?:[A-Z]{2}|com|org|net|edu|gov|mil|biz|info|mobi|name|aero|asia|jobs|museum)$ which is gotten from http://www.regular-expressions.info/email.html .
This works fine in a regular expression test tool http://regexpal.com/ , but when I use in Oracle, it does not.
DECLARE
v_exp VARCHAR2(4000);
BEGIN
   --v_exp := '^[a-z0-9!#$%&''*+/=?^_`{|}~-]+(?:\.[a-z0-9!#$%&''*+/=?^_`{|}~-]+)*@(?:[a-z0-9](?:[a-z0-9-]*[a-z0-9])?\.)+(?:[A-Z]{2}|com|org|net|edu|gov|mil|biz|info|mobi|name|aero|asia|jobs|museum)$';
   v_exp := '^[a-z0-9!#\$%&''*+/=?\^_`{|}~-]+(?:\.[a-z0-9!#\$%&''*+/=?\^_`{|}~-]+)*@(?:[a-z0-9](?:[a-z0-9-]*[a-z0-9])?\.)+(?:[A-Z]{2}|com|org|net|edu|gov|mil|biz|info|mobi|name|aero|asia|jobs|museum)$';
   dbms_output.put_line(v_exp);
   FOR v_rec IN (
      with test_data as
( select '[email protected]'     as val from dual union all
select '[email protected]'       as val from dual union all
select 'ad{[email protected]' as val from dual union ALL
select '[email protected]' as val from dual union all
select '[email protected]' as val from dual union all
select '[email protected]'      as val from dual union all
select 'no#good'                  as val from dual
select
val ,
case
    when
      regexp_like
      (val, v_exp,'i') then 'Y'
    else 'N'
    end
    as good
from test_data ) LOOP
   dbms_output.put_line(v_rec.val||', '||v_rec.good);
END LOOP;
END;   and the results are
[email protected], N
[email protected], N
ad{[email protected], N
[email protected], N
[email protected], N
[email protected], N
no#good, N
The expected result should be Y for all but for the last two.
I am not sure why it is not working in Oracle.
Can any body please help me to find the mistake and to have it correctly?
Advance Thanks,
Natarajan
Edited by: Nattu on Dec 4, 2012 1:31 AM

Try this regular expression:
>> ^[_a-z0-9-]+(\.[_a-z0-9-]+)*@[a-z0-9-]+(\.[a-z0-9-]+)*(\.[a-z]{2,4})$
>> [email protected], *Y*
>> [email protected], *Y*
>> ad{[email protected], N
>> [email protected], *Y*
>> [email protected], *Y*
>> [email protected], N
>> no#good, N
[Using a regular expression to validate an email address|http://stackoverflow.com/questions/201323/using-a-regular-expression-to-validate-an-email-address]
Edited by: stefan nebesnak on 4.12.2012 2:25

Regular Expressions In Dreamweaver

Hi i am using Dreamweaver CS3, i am creating more than 100 HTML files every couple of days and need to use the regular Expressions Feature in the Find and Replace box but couldn't find or generate the expression i am looking For, i want to Replace every images name to be same as it's htm file name across all htm Files.
Ex : cieg.htm
<tr>
    <td colspan="2"><table id="Table_04" width="850" height="88" border="0" cellpadding="0" cellspacing="0">
        <tr>
          <td><img src="Viva/XXXthefilenameXXX_38.gif" width="213" height="88"></td>
          <td><img src="Viva/XXXthefilenameXXX_39.gif" width="212" height="88"></td>
          <td><img src="Viva/XXXthefilenameXXX_40.gif" width="213" height="88"></td>
          <td><img src="Viva/XXXthefilenameXXX_41.gif" width="212" height="88"></td>
        </tr>
      </table></td>
</tr>
and replace it to be:
<tr>
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        <tr>
          <td><img src="Viva/cieg_38.gif" width="213" height="88"></td>
          <td><img src="Viva/cieg_39.gif" width="212" height="88"></td>
          <td><img src="Viva/cieg_40.gif" width="213" height="88"></td>
          <td><img src="Viva/cieg_41.gif" width="212" height="88"></td>
        </tr>
      </table></td>
</tr>
and same as another htm file named zsac.htm
Any one knows a way to do it???
Regards

You will not see sql with asp when using view source and the
like. The
server executes the query and send the results. You need to
have
access to the source documents.

Wat should be the regular expression for string MT940_UB_*.txt to be used in SFTP sender channel in PI 7.31 ??

Hi All,
What should be the regular expression for string MT940_UB_*.txt and MT940_MB_*.txt to be used as filename inSFTP sender channel in PI 7.31 ??
If any one has any idea on this please let me know.
Thanks
Neha

Hi All,
None of the file names suggested is working.
I have tried using - MT940_MB_*\.txt , MT940_MB_*.*txt , MT940*.txt
None of them is able to pick this filename - MT940_MB_20142204060823_1.txt
Currently I am using generic regular expression which picks all .txt files. - ([^\s]+(\.(txt))$)
Let me know ur suggestion on this.
Thanks
Neha Verma

Regular Expressions Help in Dreamweaver

Hi i am using Dreamweaver CS3, i am creating more than 100 HTML files every couple of days and need to use the regular Expressions Feature in the Find and Replace box but couldn't find or generate the expression i am looking For, i want to Replace every images name to be same as it's htm file name across all htm Files.
Ex : cieg.htm
<tr>
    <td colspan="2"><table id="Table_04" width="850" height="88" border="0" cellpadding="0" cellspacing="0">
        <tr>
          <td><img src="Viva/XXXthefilenameXXX_38.gif" width="213" height="88"></td>
          <td><img src="Viva/XXXthefilenameXXX_39.gif" width="212" height="88"></td>
          <td><img src="Viva/XXXthefilenameXXX_40.gif" width="213" height="88"></td>
          <td><img src="Viva/XXXthefilenameXXX_41.gif" width="212" height="88"></td>
        </tr>
      </table></td>
</tr>
and replace it to be:
<tr>
    <td colspan="2"><table id="Table_04" width="850" height="88" border="0" cellpadding="0" cellspacing="0">
        <tr>
          <td><img src="Viva/cieg_38.gif" width="213" height="88"></td>
          <td><img src="Viva/cieg_39.gif" width="212" height="88"></td>
          <td><img src="Viva/cieg_40.gif" width="213" height="88"></td>
          <td><img src="Viva/cieg_41.gif" width="212" height="88"></td>
        </tr>
      </table></td>
</tr>
and same as another htm file named zsac.htm
Any one knows a way to do it???
Regards

Dreamweaver's Find and Replace can't use the filename automatically. You would need to do it separately for each page. However, the following regular expression should speed up the process on individual pages:
Find in: Current Document
Search: Source Code
Find:
(<img src="Viva/)[\w]+(\d{2}.gif")
Replace
$1cieg_$2
In other words, you need to add "cieg" or the name of the file between $1 and _$2.
[Edited by DP to correct error in first sentence. DW cannot use the filename automatically.]

Search for a regular expression in a 1D array?

I've got a 1D array of strings, and I want to find the row with "Date: yy/mm/dd" in it. Since yy/mm/dd would not necessarily be the same between runs, I can't look for the row with "Date: yy/mm/dd".
I tried using the Search 1D Array with "Date: " and "Date: *" as my element input, but it didn't find either of 'em.
I don't know where in vi.lib the function would be in, otherwise I'd attempt to mod the function to take regular expressions, and my off-the-cuff search attempt (looping through the array & using Match Regular Expression) had some odd errors and still didn't find the row.
Thanks!

What do you define as a "row"? Is each row a single array element? Since your array elements are strings, each array element itself could be a multiline|multirow string itself that might need to be analyzed one row at a time.
To look for patterns:
If you have LabVIEW 8.0 or higher, you can use "Match regular expression". Else you can use "Match Pattern". It really depends how specific you need to be. Are there lines that start with "Date:" but don't contain a formatted date afterwards?
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LabVIEW Champion . Do more with less code and in less time .

Regular Expressions and variables OR RegExp and var

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