Programming :: Using Regular Expressions With Find?

Mar 17, 2010

Gidday, I'm puzzled as to why this works:

find /Data/ -type f -iname "*7pm*"
But this doesn't:
find /Data/ -type f -regex *7[Pp][Mm]*

I've tried MANY variations, but I'm getting no error messages, just no returns, and yet the first find, will find the sorts of files I'm looking for. I realise a win is a win, but I'm of the understanding that the -regex switch allows for some really complex use of regular expressions - but I can't even get a very simple one to work,

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Programming :: Java Regex - Use Regular Expressions Find Out What The First Two Characters Of The String Are

Feb 2, 2011

What I am doing is reading the text from a text document and storing all of the text inside of a ArrayList. I then set one of the values of the Arraylist as a string. I want to use regular expressions find out what the first two characters of the String are. if first two characters = "//" then function(); I only care about the first two characters though. If you need any more information, just ask.

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Programming :: Ant Build.xml And Regular Expressions?

May 31, 2011

i am trying to create an exclude regular expression for my build.xml. The problem is, that i am trying to find some info on which REs are acceptable/valid for ant... Is ant using standard regular expressions? POSIX ones? Since it is a java-based tool, the "Java REs" are probably valid. I am a little bit confused. If somebody can help me out with the different RE standards, i would be most obliged.

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Ubuntu :: How Do I Use Regular Expressions

Aug 15, 2010

I want to use regular expressions and sed to remove html tags from a text file.

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Ubuntu :: MP3 Metadata With Regular Expressions?

Mar 29, 2010

how a way that I can edit the metadata tags on some MP3s using regex?

I've got almost 100 MP3, all named "01 - <song title>," "02 - <song title>," etc., and I, understandably, don't want to edit them all by hand.

Running "s/d{2} - //g" would be so much easier.

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General :: Using Wc And Grep With Regular Expressions?

Apr 16, 2010

I'm writing a program that works with text files, and I'm trying to create some filters with grep. I have various questions here, so I'll number them for clarity.

1) First of all, I'd like to know what wc -w is actually returning. The word count is less than what gedit is counting in Document Statistics, so obviously gedit is counting something (like newlines) that wc -w is not

2) Secondly, I was wondering if there was a way to grep x number of words. I'm looking for something like the -m option, but returning a certain number of words instead of lines. For example, to find the first 2000 words, do something like grep -someoption 2000 ".*" or using {1,2000}.

3) Finally, I'm trying to filter out headers and footers of a text file but having no luck. The text files are Project Gutenberg files, so they have standardized headers and footers. Here's an example: [URL]...

The header starts with "The Project Gutenberg EBook of" and ends with the line containing "START OF THIS PROJECT GUTENBERG EBOOK" The footers begin with: "End of the Project Gutenberg EBook of" My problem is, grep can find:


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Software :: Library For Regular Expressions In C++?

Mar 26, 2011

I've began to develop with C++ (Eclipse+Qt) and the first problem I see is that there is not good functions for manipulating strings. if there is a library for manipulating strings with regular expressions?

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Fedora :: Regular Expressions And E-mail Validation?

Jan 12, 2010

The * would not have to be because it means everything [az] [0-9 ][$%&!"/()=?'=) but not how to solve[URL]..

ls [0-9a-zA-Z]*[@]*[gmail | yahoo | hotmail]*[.]*[com]
ls [0-9a-zA-Z][.-_][0-9a-zA-Z]*[@]*[gmail | yahoo | hotmail]*[.]*[com]

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General :: Terminal - Using Regular Expressions With Grep

Aug 3, 2011

I can't get this simple regular expression to work for matching emails: 'w*(?:.w*)*@w*(?:.w*)*w{2,5}'

It should be working as I have tested it with regex pal and it works just fine. I think there's a problem with optional character class but I'm not sure.

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General :: Regular Expressions In Batch Script?

May 5, 2010

I am pretty new at this topic but I would like to learn it from example. The first thing I am working on is to modify the command date to be shown as DD/MM/YY only using regular expression but I dont know how to combine what there is in the regexp tutorials online and the syntax for batch scripting. Any help?

Here is what I what.
run a file test: ~# ./test
Where file test is:
DATE=$( date )


Also if you can point me to good regexp tutorials (directed towards batch scripting), that will be great.

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General :: Difference Between Regular Expressions And Globbing?

Aug 26, 2010

As the subject says, can anyone explain to me what is the difference between Regular Expressions and Globbing?

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Software :: Make Vim Use Extended Regular Expressions?

Jun 8, 2010

How do I make Vim use extended regular expressions?

I really wish I wouldn't have to use all these ugly backslashes to do backreferences.

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Ubuntu :: Point To A Two-digit Interval With Regular Expressions?

Sep 9, 2010

Is it possible to point to a two-digit interval with regular expressions?

I'm using mplayer to watch tv shows, that often have episode numbers in their names. I know how to easily add several files to the playlist by using brackets, by typing something like
$ mplayer tv/South.Park.S1.E0[1-5]*avi

Is there a way to point to files 06-13 in a single expression?

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General :: Process Multi-line Regular Expressions?

Feb 23, 2010

How to make tools like sed operate on the whole file, instead of line-by-line?

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General :: Regular Expressions Match 2 File Names?

Nov 20, 2010

How can we do a simple match by regular expressions on two filenames. I plan to use it in the command 'find -regex'


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General :: Delete Files On The Command Line With Regular Expressions?

May 6, 2010

Lets say I have 20 files named FOOXX, where XX is the number of the file, eg 01, 02 etc. At the moment, if I want to delete all files lower than the number 10, this is easy and I just use a wildcard, eg rm FOO0* However, if I want to delete specific files ina range, eg 13-15, this becomes more difficult. rm FPP[13-15] does not work, and asks me if I wish to delete all files. Likewse rm FOO1[3-5] wishes to delete all files that begin with FOO1 So, what is the best way to delete ranges of files like this? I have tried with both bash and zsh, and I don't think they differ so much for such a basic task?

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Server :: Case Statement With Regular Expressions - Date Manipulation Script

Aug 19, 2010

Here's my need:
If Calendar Day= Then FCPeriod= And FCYear=
Jan 11 to Feb 1002Current Year of Feb 10
Feb 11 to Mar 1003Current Year of Mar 10
Mar 11 to Apr 1004Current Year of Apr 10
Apr 11 to May 1005Current Year of May 10
May 11 to June 1006Current Year of June 10
June 11 to July 1007Current Year of July 10
July 11 to Aug 1008Current Year of Aug 10
Aug 11 to Sept 1009Current Year of Sept 10
Sept 11 to Oct 1010Current Year of Oct 10
Oct 11 to Nov 1011Current Year of Nov 10
Nov 11 to Dec 1012Current Year of Dec 10
Dec 11 to Jan 1001* Current Year of Jan 10

* Note for Dec 11 - Dec 31,
The Next Year to be used
IE: Current date is Dec 28th, 2010. Year = 2011
IE: Current date is Jan 8th, 2011, Year = 2011.
Looks like I'll need a case statement with some regular expressions...

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Programming :: Using Grep And Regular Expression To Find Class References In C++ File?

May 28, 2010

I'm trying to math all class references in a C++ file using grep with regular expression. I'm trying to know if a specific include is usuless or not, so I have to know if there is a refence in cpp. I wrote this RE that searches for a reference from class ABCZ, but unfortunately it isn't working as I espected:

grep -E '^[^(/*)(//)].*[^a-zA-Z]ABCZ[]*[*(<:;,{& ]'
^[^(/*)(//)] don't math comments in the begging of the line ( // or /* )
.* followed by any character


Well, I can get patterns like this:

class Test: public ABCZ{
class Test: public ABCZ {
class Test : public ABCZ<T>


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Programming :: Sed Just Can't Get It To Copy Between Expressions

Apr 22, 2010

im trying to get sed to read through a txt document that contains html and cant get it to copy over my code looks like Code: sed -n '/[width=468 height=60 border=0 /></a></center><hr>]/,/[<br clear=left><hr>]/p' 1.txt > 2.txt This is the code that seemed to have the best chance of working but still all it does is copy the whole txt document over instead of between these 2 expressions

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Programming :: Parsing S-Expressions In Python?

Feb 1, 2011

I've been loosely following this: I have a problem: the parsing function throws an array out of bounds exception. I thought that maybe I'm doing it wrong, so I copy and pasted the code from the page, and still the same error

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Programming :: Get The Strings That Matched Sub-expressions?

Jun 8, 2010

Using the regex.h functions, how do you:

1) get the matched strings?

2) get the strings that matched sub-expressions?

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Programming :: Cannot Use Fixed Size Buffers Contained In Unfixed Expressions

Jun 30, 2011

I'm struggling with a C# program to read binary records from a database. The records were created with Borland Delphi. Error: You cannot use fixed size buffers contained in unfixed expressions. Try using the fixed statement.

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Programming :: Regular Expression {x} Doesn't Work?

Sep 2, 2010

I am trying myself on regular expressions. A read on [URL]/regex.htm) that {x} means search X times preceding character. So, why is this :

wstation~> echo '123456789' | grep [0-9][0-9][0-9]
123456789 # MATCH !! I have 3 numbers in a row.


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Programming :: Extract A Substring Using Regular Expression With SED

May 7, 2011

I've spent most of the evening browsing the web, trying many things I've found on various forums, but nothing seems to work.

I have a test.txt file containing many lines like the following ones :

<insert_random_text>228.00 €<insert_more_random_text>
<insert_random_text>17.50 €<insert_more_random_text>
<insert_random_text>1238.13 €<insert_more_random_text>

And I want to extract :


There is always one occurrence of € in each line. I want the numeric value that precedes this € occurrence. The random text (before and after) may contain numbers too, so the € may be important to parse, in order to correctly identify the number to return. The last character that precedes the number to extract is always a ">" (coming from an HTML tag).

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Programming :: Python Replace() With Regular Expression?

Mar 16, 2011

i cant use regular expression in replace function. I want to do this

a = ' Bad boy'
b = a.replace("b[aA]d", '')

Ofcourse this is a simple example for my query. Its not working so shall i assume regex dont work with replace function ?

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Programming :: Sed Regular Expression Match Everything Up To A Certain Character

May 27, 2009

I need to use sed to edit a file that contains just one line. This should be pretty simple, but I've googled and can't seem to figure it out. I need to match everything from a certain string up until the first comma in the line. There are multiple commas in the line and my matching pattern is matching up until the last comma, not the first.

Here is what I'm trying:

As you can see it is matching up until the last comma. Seems like the .* is matching any character including the other commas. The output from this that I am hoping to achieve:

How can I get the regular expression to match from asdf: up until the first comma?

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Programming :: AWK: Compare Apache Dates Without Using Regular Expression

May 15, 2010

I'm writing a loganalysis application and wanted to grab apache log records between two certain dates. Assume that a date is formated as such: 22/Dec/2009:00:19 (day/month/year:hour:minute) Currently, I'm using a regular expression to replace the month name with its numeric value, remove the separators, so the above date is converted to: 221220090019 making a date comparison trivial.. but.. Running a regex on each record for large files, say, one containing a quarter million records, is extremely costly.. is there any other method not involving regex substitution? here's the function doing the convertion/comparison


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Programming :: Use A Regular Expression In Parantheses Like ([/+[]()]) To Get The Specific Letters?

May 3, 2010

I found such simple example of awk

awk '
BEGIN { a = "1abc 2def"
b = gensub(/(.+) (.+)/, "\2 \1", "g", a)
print b }'

However I don't understand why the regular expresion in parentheses doesn't work how I woud expect. If I delete the .+ so it does the same.

awk '
BEGIN { a = "1abc 2def"
b = gensub(/() ()/, "\2 \1", "g", a)
print b }'

I wanted to use a regular expression in parantheses like ([/+[]()]) to get the specific letters.

awk '
BEGIN { a = "1abc 2def"
b = gensub(/([/+[]()])/, "//\1", "g", a)
print b }'

But why the regexp in () isn't working

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Programming :: Awk - Substitution With Parts Of Matched Regular Expression Used?

Apr 30, 2011

I remember reading that using sed, you can do this with parentheses: s/abc(something)def/(something)else/g I can't find an explanation of how to do something like this with Awk. Say you have this in an HTML file, where (number) stands for a one or two-digit number:


And you want to change that to this:

<a name="(number)t" href="#(number)b"><sup>(number)</sup></a>

How would this be possible? Would you have to use sed?

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Programming :: Perl Regular Expression To Change Character

May 26, 2009

Part of a perl script I am writing need to change the character at an index to upper case. Now i am new to perl and i am having some trouble getting it to do it. In c++ i would do something like


Now from what i understand the same thing is possible in perl using regular expressions. But i cant get it to work.

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