If you display several line of text from you input file, maybe we can do better than just guess as to what we we're reading. I do not see why you have getline in there. Your expected output is just a single line, per your example.
Hi,
I need to match lines after a pattern, upto the first blank line.
Searched in web and some forums but coulnt find the answer.
where <restart_step> =
10 -- Execute query
20 -- Write the contents to the Oracle table
30 -- Writing Contents to OUTPUT... (7 Replies)
i have a file which contains alphanumeric data in every line. what i need is the data after certain pattern. the data after the pattern is not of fixed length so i need the data till the space after the pattern.
Input file:
bfdkasfbdfg khffkf lkdhfhdf pattern (datarequired data not required)... (2 Replies)
Hi,
I have got the below requirement. please suggest.
I have a file like,
Processing Item is:
/data/ing/cfg2/abc.txt
/data/ing/cfg3/bgc.txt
Processing Item is:
/data/cmd/for2/ght.txt
/data/kernal/config.klgt.txt
I want to process the above file to get the output file like,
... (5 Replies)
I have a file which is like this
………………………………………..
…………………………………
…………………………………
……………………………………
…………………………………….
………………………………
<<<from_here>>>
………………………………
……………………………….
I want a script which would fetch the data starting from <<<from_here>>> in the file till the end... (2 Replies)
hi guys,
im trying to add the following line in my xml file
<dbrollbacksegs <oa_var="s_db_rollback_segs">NOROLLBACK</dbrollbacksegs>
when ever i find the following line
<dbsharedpool oa_var="s_dbsharedpool_size">300000000</dbsharedpool>
I have succedded till adding a new line... (1 Reply)
I had a spot of trouble coming up with a title, hopefully you'll understand once you read my problem... :)
I have the output of an ldapsearch that looks like this:
dn: cn=sam,ou=company,o=com
uidNumber: 7174
gidNumber: 49563
homeDirectory: /home/sam
loginshell: /bin/bash
uid: sam... (2 Replies)
" Script for display sentences with special character"
Hi,
Could any one share a command how to display a line until my target word.
For ex: My file has the content as:
select * from db_wrk where col1 < col2
insert into table_name values('1','2','tst','wrk','dev','prod')
My target... (10 Replies)
hi,
i have /etc/inittab, I want to add another line after that when i find a pattern "l6:6:wait:/etc/rc.d/rc 6".
original
l6:6:wait:/etc/rc.d/rc 6
after-change
l6:6:wait:/etc/rc.d/rc 6
/sbin/if-pp-to-cng (3 Replies)
Im using the command below , but thats not the output that i want. it only prints the odd and even numbers.
awk '{if(NR%2){print $0 > "1"}else{print $0 > "2"}}'
Im hoping for something like this
file1:
Text hi this is just a test
text1 text2 text3 text4 text5 text6
Text hi... (2 Replies)
Looking for help,
i have input file like below and want to modify to expected output, if can without create additional file, hope can direct modify it.
have 2 thing need do.
1st
is adding a word (testplan generation off) after ! ! IPG: Tue Aug 07 14:31:17 2018
2nd
is adding... (16 Replies)
Discussion started by: kttan
16 Replies
LEARN ABOUT DEBIAN
io::handle::prototype::fallback
IO::Handle::Prototype::Fallback(3pm) User Contributed Perl Documentation IO::Handle::Prototype::Fallback(3pm)NAME
IO::Handle::Prototype::Fallback - Create IO::Handle like objects using a set of callbacks.
SYNOPSIS
my $fh = IO::Handle::Prototype::Fallback->new(
getline => sub {
my $fh = shift;
...
},
);
DESCRIPTION
This class provides a way to define a filehandle based on callbacks.
Fallback implementations are provided to the extent possible based on the provided callbacks, for both writing and reading.
SPECIAL CALLBACKS
This class provides two additional methods on top of IO::Handle, designed to let you implement things with a minimal amount of baggage.
The fallback methods are all best implemented using these, though these can be implemented in terms of Perl's standard methods too.
However, to provide the most consistent semantics, it's better to do this:
IO::Handle::Prototype::Fallback->new(
__read => sub {
shift @array;
},
);
Than this:
IO::Handle::Prototype::Fallback->new(
getline => sub {
shift @array;
},
);
Because the fallback implementation of "getline" implements all of the extra crap you'd need to handle to have a fully featured
implementation.
__read
Return a chunk of data of any size (could use $/ or not, it depends on you, unlike "getline" which probably should respect the value of
$/).
This avoids the annoying "substr" stuff you need to do with "read".
__write $string
Write out a string.
This is like a simplified "print", which can disregard $, and "$" as well as multiple argument forms, and does not have the extra
"substr" annoyance of "write" or "syswrite".
WRAPPING
If you provide a single reading related callback ("__read", "getline" or "read") then your callback will be used to implement all of the
other reading primitives using a string buffer.
These implementations handle $/ in all forms ("undef", ref to number and string), all the funny calling conventions for "read", etc.
FALLBACKS
Any callback that can be defined purely in terms of other callbacks in a way will be added. For instance "getc" can be implemented in terms
of "read", "say" can be implemented in terms of "print", "print" can be implemented in terms of "write", "write" can be implemented in
terms of "print", etc.
None of these require special wrapping and will always be added if their dependencies are present.
GLOB OVERLOADING
When overloaded as a glob a tied handle will be returned. This allows you to use the handle in Perl's IO builtins. For instance:
my $line = <$fh>
will not call the "getline" method natively, but the tied interface arranges for that to happen.
perl v5.10.1 2009-09-29 IO::Handle::Prototype::Fallback(3pm)