One concern, i am not sure what will be content of all your blah blah. If they will cover all the content, maybe will cause some conflict with the code. Anyway, please try it, if any problem, please post it. Maybe all of us here can help you to solve it.
code:
Code:
sed '/^$/d' a > a.tmp
nawk 'BEGIN{
FS="\r"
RS="}\r"
a="abc"
b="pqr"
}
{
if ($1=="" && index($2,a)==0 && index($2,b)==0)
print $0
if ($1!="" && index($1,a)==0 && index($1,b)==0)
print $0
}' a.tmp
rm a.tmp
Hi, experts,
I would like to create a function that can calculate the total number of lines in a saved text file and delete specific lines in that particular file (I only want the last few lines). Hav anybody have the experience and giv me a hand in this? (9 Replies)
Hi All,
I have a dhcpd.conf file that gets static hosts added and removed via a shell script. After sometime, there becomes huge gaps of space ( blank lines ) between each host block. I tried a couple of sed one-liners; but, I can't seem to get the output I'm looking for. Also, I would like... (4 Replies)
Hi,
This is part of a large text file I need to separate out.
I'd like some help to build a shell script that will extract the text between sets of dashed lines, write that to a new file using the whole or part of the first text string as the new file name, then move on to the next one and... (7 Replies)
Hi everybody!
I need to delete several vertical lines in a huge text file.
It should work like the example below. Delete the vertical lines 2 and 8.
123456789
masldfjla
afsajfwel
sajfljsaf
safsarfrl
sajfeljwq
1345679
msldfja
asajfwl
sjfljsf
sfsarfl
sjfeljq
Is there a... (11 Replies)
hi guys,
I have very large txt files (200GB) and just want to to delete the first two lines (headers). So far I used
sed -i '1,2d' infile.txtbut this command always takes extremely long as it writes all again. Is there a better way to do it (ie just to delete the lines without writing all... (2 Replies)
I have 2 TXT files with with 8 columns in them(tab separated). First file has 2000 entries whereas 2nd file has 300 entries.
The first file has ALL the lines of second file. Now I need to remove those 300 lines (which are in both files) from first file so that first file's line count become... (2 Replies)
Hi All
I have a list of files which will have duplicate list of blocks of text. Following is a sample of the file, I have removed the sensitive information from the file.
All the code samples starts from <TR BGCOLOR="white"> and Ends with IP address and two html tags like this.
10.14.22.22... (3 Replies)
Hi
I have a text file like below. THe content of the text will vary.
Entire text file have four consecutive lines followed with blank line.
I want to delete the occurrence of the two consicutive lines in the text file. I don't have pattern to match and delete. Just i need to delete all... (5 Replies)
Hi,
I tried the following options but was unable to delete blank lines from file
Input file = temp.hash.txt
temp.hash.txt content
90
0
89.56
0
0
57575.4544
56.89 (9 Replies)
Discussion started by: uuuunnnn
9 Replies
LEARN ABOUT DEBIAN
alzabo::index
Alzabo::Index(3pm) User Contributed Perl Documentation Alzabo::Index(3pm)NAME
Alzabo::Index - Index objects
SYNOPSIS
foreach my $i ($table->indexes)
{
foreach my $c ($i->columns)
{
print $c->name;
print '(' . $i->prefix($c) . ')' if $i->prefix($c);
}
}
DESCRIPTION
This object represents an index on a table. Indexes consist of columns and optional prefixes for each column. The prefix specifies how
many characters of the columns should be indexes (the first X chars). Some RDBMS's do not have a concept of index prefixes. Not all col-
umn types are likely to allow prefixes though this depends on the RDBMS. The order of the columns is significant.
METHODS
columns
Returns an ordered list of the "Alzabo::Column" objects that are being indexed.
prefix ("Alzabo::Column" object)
A column prefix is, to the best of my knowledge, a MySQL specific concept, and as such cannot be set when using an RDBMSRules module for a
different RDBMS. However, it is important enough for MySQL to have the functionality be present. It allows you to specify that the index
should only look at a certain portion of a field (the first N characters). This prefix is required to index any sort of BLOB column in
MySQL.
This method returns the prefix for the column in the index. If there is no prefix for this column in the index, then it returns undef.
unique
Returns a boolean value indicating whether the index is a unique index.
fulltext
Returns a boolean value indicating whether the index is a fulltext index.
function
For function indexes, this returns the function being indexed.
id
The id is generated from the table, column and prefix information for the index. This is useful as a canonical name for a hash key, for
example.
Returns a string that is the id which uniquely identifies the index in this schema.
table
Returns the "Alzabo::Table" object to which the index belongs.
AUTHOR
Dave Rolsky, <autarch@urth.org>
perl v5.8.8 2007-12-23 Alzabo::Index(3pm)