You can "multiply" regexp parts with the "\{...\}" operator. For instance: "x" means a single "x", but "x\{3\}" means "three x" and would be equivalent to "xxx". But it comes even better, the operator can be given two values, which will define a range: "x\{1,3\}" means "one, two or three x". Instead of "x" one could even put a complicated regexp in braces.
Now your problem: a single field in a comma-separated file would be matched by: "[^,]*,". You have already figured that out. Now we try to match something in the 11th field. This is: ten fields, followed by the field on question:
This matches "xxx" in the eleventh field. You see you could shorten and simplify your regexp considerably using this device. Your search for "more than 999.9 in the 10th, 11th or 12th field" could look like this:
9-11 fields, followed by a number of at least 4 digits.
We have an access log where column 8 displays the time in seconds like below:
Tj8nQAoNgwsAABov9cIAAAFL - 10.13.131.80 - - (0) - "GET /aaaaa/bbbb/bbbb
where column 8 is printed (0). We are trying to find how many entries are there that has column 8 greater than 0.
Remember $8 is (0) and not... (5 Replies)
my files are as follows
fileA sepearated by tab /t
00 lieferungen
00 attractiop
01 done
02 forness
03 rasp
04 alwaysisng
04 funny
05 done1
fileB
funnymou120112
funnymou234470
mou3raspnhdhv
rddfgmoudone1438748
so all those record which are greater than 3 and which are not... (4 Replies)
Hello,
:wall:
I have a 12 column csv file. I wish to delete the entire line if column 7 = hello and column 12 = goodbye. I have tried everything that I can find in all of my ref books.
I know this does not work
/^*,*,*,*,*,*,"hello",*,*,*,*,"goodbye"/d
Any ideas?
Thanks
Please... (2 Replies)
Hi all,
I am new to shell script.I need your help to write a shell script.
I need to write a shell script to extract data from a .csv file where columns are ',' separated.
The file has 5 columns having values say column 1,column 2.....column 5 as below along with their valuesm.... (3 Replies)
Hi List,
I have a chunk of data like so:
User Account Control:
User Account Control:
User Account Control:
User Account Control:
Disabled
User Account Control:
User Account Control:
User Account Control:
Disabled
User Account Control:
User Account Control:
... (3 Replies)
Hi, I am newbie in shell script.
I need your help to solve my problem.
Firstly, I have 2 files of csv and i want to compare of the contents then the output will be written in a new csv file.
File1:
SourceFile,DateTimeOriginal
/home/intannf/foto/IMG_0713.JPG,2015:02:17 11:14:07... (8 Replies)
I am running an ISQL command on Sybase DB and getting output of a query in an CSV file.
The issue is that all the data comes in to the same column, i want them to be separated in different columns.
SQL_COMMAND=command.sql
file=file.txt
formatFile=formatFile.txt
report=report.csv
echo... (1 Reply)
I have two csv files of different sizes. The output file needs to have file1 contents on top of file2 contents where file2 col1 is >= to file1 col1, and file2 col1(same value) is < file1 col1 (next value). So basically, some file2 rows will be matched to the same file1 row because it is the closet... (7 Replies)
Adding new column data in csv from UNIX
Hi I need to add new column data daily to existing csv file. Please assist
7/11 7/10 7/9 7/8
space 10 GB 20 GB
I was able to generate current day's data in csv but unable to add the previous 30 days data to the same csv
Please use code tags,... (2 Replies)
Discussion started by: archana25
2 Replies
LEARN ABOUT DEBIAN
shevek_regexp
shevek::regexp(3) Library Functions Manual shevek::regexp(3)NAME
shevek::regexp -
Use regular expressions.
SYNOPSIS
#include <regexp.hh>
Public Member Functions
regexp (std::string const &pattern=std::string(), bool case_sensitive=false)
Create a new object, and optionally fill it with a pattern.
regexp & operator= (std::string const &pattern)
Set a pattern, removing the previous one.
regexp (regexp const &that)
Copy a regexp.
regexp & operator= (regexp const &that)
Copy a regexp.
void case_sensitive (bool value=true)
Set whether the evaluation should be case sensitive.
~regexp ()
Destructor, this cleans up internal structures.
bool operator() (std::string const &data)
Check whether the pattern matches a string, and fill internal match structures if it does.
std::string operator[] (unsigned idx) const
Retrieve the value of a subexpression from the last matched string.
bool valid (unsigned idx) const
Test whether a subexpression was filled by the last matching string.
unsigned size () const
Get the number of subexpression.
std::string transform (std::string const &data) const
Transform a string with -codes according to the last matching string.
std::string const & pattern () const
Get the current pattern.
Detailed Description
Use regular expressions.
Member Function Documentation
std::string shevek::regexp::operator[] (unsignedidx) const
Retrieve the value of a subexpression from the last matched string. This throws an exception if the subexpression is not valid.
Author
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libshevek Fri May 11 2012 shevek::regexp(3)