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 :: 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:

<sup>(number)</sup>

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 :: Bash: Repeat Commands Until A Condition Is Matched?

Mar 8, 2011

need to modify some scripts to repeat the commands in them until a variable returns a proper value. I need it to add some redundancy to some scripts i use to upload files to a remote server.This is an example of a portion of those scripts:

Code:
################## site UPLOAD ##################
site_login=$(curl -c $site_cookie -L -F user=$site_user -F pass=$site_password -F

[code]....

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Programming :: Add A Character To The End Of A Line When A Certain Match Text Is Matched?

Nov 5, 2010

Is there any way to add a character to the end of a line when a certain match text is matched. I have a text file where any line that contacts text XYZ a z is placed at the end.

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Programming :: Shell To Remove Line Matched With Variable?

Jul 25, 2011

I'm using sed to remove certain line in a text file based on a match with 2 variables from input. Here is how it looks like in file

Philip S:Odds:45:343
Mike Junior:Odds:3:56

I prompt for 2 inputs in variable form which is compared to the first 2 fields of the above text (: seperated). So say i enter Philip S and Odds then it should delete the entire first line.

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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 :: 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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Programming :: Parsing S-Expressions In Python?

Feb 1, 2011

I've been loosely following this:http://norvig.com/lispy.htmlAnd 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 :: Using Regular Expressions With Find?

Mar 17, 2010

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

Code:
find /Data/ -type f -iname "*7pm*"
But this doesn't:
Code:
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 :: Removing Left Recursion - Construct An AST From It By Executing A Piece Of Code For Every Nonterminal Matched?

Apr 7, 2011

I'm still a but confused about the standard way of removing it for left-associative operators: [URL] Especially about how to construct an AST from it by executing a peice of code for every nonterminal matched. And I'm still not totally convinced that it will be left-associative, I just barely understand it. Also, how would you remove left-recursion for something like this:

Code:
expr ::= expr "(" param_list ")"
| other stuff...?

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General :: Searching And Replacing Strings In File With Strings In Other Files

Jul 29, 2010

I want to search and replace strings in a file with strings in other files/i need to do it with big strings(string1 is big) and i want to use a txt file for this.But this code not working :

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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 :: 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 :: Using Sed To Change Strings?

Sep 3, 2010

I am having a lot of problems trying to change one string by another using sed: the sentence is like this:

sed -i 's/KERNEL=="tty[A-Z]*", NAME="%k", GROUP="uucp", MODE="0660"/KERNEL=="tty[A-Z]*", NAME="%k", GROUP="uucp", MODE="0666"/g' 50-udev.rules
it is just to fing the line with:
KERNEL=="tty[A-Z]*", NAME="%k", GROUP="uucp", MODE="0660"

[code]....

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Programming :: C Truncating Strings

Dec 11, 2009

I wrote this small program that will truncate a string that's entered in by the user.An example of its usage:if the user enters in a string say "abcdefghijklmnopqrstuvwxyz" the program will only take the first 9 characters and truncate the rest so that the user can be prompted for a second string and not be worried about remaining characters left in the stream.Now this program works O.K. but I would like to find something in C that has this functionality build into it...Does anyone know of any function that will accomplish this.

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Programming :: Replace Txt Between 2 Strings?

Aug 4, 2010

I am trying to replace a section of a file between the first instances of the strings {}, with the contents of another file. Example of the format of the file I'm trying to modify

Code:

Servername=something.com
hosts {
macaddress1
macaddress2

[code].....

Then captured all the "macaddress#"s to a variable and used sed to swap

sed "s/$CURRENTDATA/$NEWDATA/" filename

However I get 1 of 2 errors,

Using a small number of macs in "$NEWDATA"

sed: command garbled: s/ macaddresshere

Or when using a large number of macs in the $NEWDATA variable get

bash: /usr/bin/sed: Arg list too long.

how to replace a large block of txt in one file with another large block from another?

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Debian Programming :: Sh Command Strings

Feb 8, 2014

I use udhcp with some of my minimal installs. I've messed around with the code a bit when it wasn't working correctly - a few years ago. I will find time - I hope soonish - to figure out how to do a few other things with it.

For now though, I'm using this string to grab my ip after startup

Code: Select allsu -c 'ifconfig eth0&&ifdown -a&&ifup lo&&ifup eth0'&&/sbin/ifconfig eth0

I realize I could substitute ifup -a but I'm more interested in figuring out how to make ifup wait for the ip to become available if it is not available yet.

Never mind that one, just typing out the question answered it for me, when I find it in the scripting man ' ; : " & =

Or if there are any other suggestions for better construction of the string.

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Programming :: Extracting URLs From Strings?

Jun 28, 2009

I have a PHP script written that is checking a string to see if it contains a link in it (i.e. a URL). I have the following if statement, that uses 3 possible regular expressions to determine if there is a link or not.

Code:
// check if we found a link
// links are denoted by strings that:
// - contain http://
// - contain www.*.*

[Code]....

I'm not convinced yet that writing a shell script to do this is the best course of action. If someone is capable of doing this with a Perl or a Python script that's fine too. If you want to make it super high performance and write it in assembly

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Programming :: Best Command To Use To Parse Strings?

Mar 24, 2010

what is the best command to use to parse strings?I have a variable $str and need to parse this string.Can you provide an example of the command used to get a substring of $str based on the index values of start and end

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Programming :: Cannot Match Strings That Appear To Be Identical

Feb 25, 2011

i have an sql table with 2 columns i run a script that randomly selects a word from the table in column 1.
the word is displayed on the screen and I guess what it means i concatenate the randomly selected word and the answer the script looks for a match in mysql if it finds a match it says "Good job!" if there is no match it will say "not correct". However when i get it right it says not correct even though when i echo the variables they look exactly the same. the script below:

#!/bin/bash
var=$(mysql translator -u root --password=*-N<<EOF
SELECT word FROM tagalog ORDER BY RAND() LIMIT 1
EOF
)

[Code]....

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Programming :: 'strings' Binary From Binutils - How To Use It

Jul 14, 2010

it is about 'strings' binary from binutils. I recently wanted to test what it does and how it works. The best I did was this:

Code:

#!/bin/sh
PROGRAM="
int main()
{

[code]....

Ok, from the output I don't get it.Can someone show me in a simple script, what is 'strings' good for ?

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Programming :: Variable Strings In A Script?

Sep 5, 2009

I have a set of numbers under some headers in a file:

FNUM,BNUM,C1N,C2N,C3N,C1S,C2S,C3S,
4535, 109, 5.5955, 5.6523, 5.8084, 311.419, 295.2540, 286.9984,
4536, 109, 5.7667, 5.7174, 5.6771, 291.782, 285.0646, 271.5945,

[code]...

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Programming :: Working With Strings In An Xml File C++?

Mar 7, 2011

I have a function that retrives text between title and links tags from an XML file, but what i want is to test if the title and link tags are between item tags. This is my code:

Code:
istringstream iss(content);
string line;

[code]...

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Programming :: Grep - Find The Strings Only Between Begin And End

Dec 15, 2010

if I'd a file like this

something
somethine123
begin something end
begin xyz end
somethingelse

and I want to find the strings only between begin and end, exluding begin and end; How can I grep that?

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Programming :: Grep Searching For Strings With (apostrophe)

Nov 10, 2010

I am trying a search for a pattern in the file. I can have any character in the pattern. I am pretty sure I will have $, ", ', ^, ` etc., The Problem I am facing is if I use "" (double quotes) to enclose the pattern, it gives special meaning to $, ^ and " within the string. I have no control over the pattern input. I am getting it from some other file. On the other hand, If I use '' (single quotes) to enclose the pattern, it gives special meaning to the ' (apostrophe) within the string and terminates the pattern prematurely. How do I disable the special meaning these characters have? For example, in perl, I could enclose the pattern within Q and E. Is there an equivalent in grep pattern expression? I could find one in the man page of grep. Is there a solution to this problem?

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Programming :: Handle Query Strings Using Socket?

Dec 7, 2009

I need to make a daemon which listens to port 81 for messages like [URL] So far I made a daemon which serves as a simple stream server: I set up a socket to listen to a non-reserved port (like 9999), but I don't know how to read the query strings.

Linux distro: Kubuntu 9.04
Language: C

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Programming :: Implement Variable Substitution In Strings?

May 6, 2011

I have an interpteter that supports string literals, and the way it works is that the lexer returns the entire string as a single token, with the quotes removed and escape sequences replaced with the literal characters they represent.

I already implemented single-quote strings, they don't interpret any characters specially except for the single quote. I partially implemented double-quoted strings, they already support all the same backslash escape sequences that C does. But I would also want to add variable substitution.

The way it would work is that "${expression}" would interpret the expression (which could just be a variable name) and replace itself with the result. But I have no idea how to do this.

In case it matters, I'm using a hand-written lexer and recursive-descent parser.

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Programming :: Match Strings Inside 2 Lists?

Jul 8, 2011

I have that script that checks the nfs mount points:

Code:
#!/bin/ksh
#set -xv
test="DO_NOT_DELETE"
rc=0

[Code]....

I am no expert in loops and it took me all day to write that. I couldn't really tell how to match the string in $df_file and $fs_share, so I did a little workaround with a count.

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Programming :: Python: Using Strings To Run Commands In Os.system('')

Jun 20, 2011

I was zsync-ing the latest Ubuntu 11.10 Alpha and thought I'd make a little GUI for it as a small project. The gui is set up, I just need to figure out how to run zsync with content from to variables, cto and cfrom. I tried the following code:

[Code]....

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Programming :: Bash - Searching Strings For Array Elements?

Apr 30, 2010

...and returning the index of the found element in its array.

I have:

for ((i=0; i < ${#array1[@]}; i++)); do
# Read each line of the file test
if [[ $(eval "sed -n '$(($i+1))'p test") == *${array2[0]}* ]]
stuff

I want to find the index of the found substring in array2 and only if it isn't found, move on to the next element of array2. I don't know the size of array2 so that [0] has just got to go.

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