02-06-2008
Hello, Thanks for the reply.
But I don't think I can use grep as I don't know what are the data block in between teh search string.
My file layout is as follows:
------------------------------
Data
(numerous lines)
------------------------------
Data
(numerous lines)
------------------------------
Data
(numerous lines)
------------------------------
Data
(numerous lines)
And so on. I only need to get the 3 lines above and below the -----------
as well as the -------------
Thanks for any assistance
.
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LEARN ABOUT REDHAT
data::grove::parent
Data::Grove::Parent(3) User Contributed Perl Documentation Data::Grove::Parent(3)
NAME
Data::Grove::Parent - provide parent properties to Data::Grove objects
SYNOPSIS
use Data::Grove::Parent;
$root = $object->root;
$rootpath = $object->rootpath;
$tied = $object->add_magic([ $parent ]);
$node = Data::Grove::Parent->new($hash [, $parent]);
$node_list = Data::Grove::ParentList->new($array [, $parent]);
DESCRIPTION
Data::Grove::Parent is an extension to Data::Grove that adds `"Parent"' and `"Raw"' properties to Data::Grove objects and methods for
returning the root node of a grove, a list of nodes between and including the root node and the current node, and a method that creates
parented nodes.
Data::Grove::Parent works by creating a Perl ``tied'' object that contains a parent reference (`"Parent"') and a reference to the original
Data::Grove object (`"Raw"'). Tying-magic is used so that every time you reference the Data::Grove::Parent object it actually references
the underlying raw object.
When you retrieve a list or a property of the Raw object, Data::Grove::Parent automatically adds magic to the returned list or node. This
means you only call `add_magic()' once to create the first Data::Grove::Parent object and then use the grove objects like you normally
would.
The most obvious use of this is so you don't have to call a `"delete"' method when you want to release a grove or part of a grove; since
Data::Grove and Data::Grove::Parent objects have no cyclic references, Perl can garbage collect them normally.
A secondary use is to allow you to reuse grove or property set fragments in multiple trees. WARNING: Data::Grove currently does not pro-
tect you from creating your own cyclic references! This could lead to infinite loops if you don't take care to avoid them.
METHODS
$object->root()
$object->rootpath()
`"root()"' returns the root node if `$object' is a `"Data::Grove::Parent"' object. `"rootpath()"' returns an array of all the nodes
between and including the root node and `$object'.
$tied = $object->add_magic([ $parent ])
`"add_magic()"' returns a "Data::Grove::Parent" object with `$object' as it's `"Raw"' object. If `$parent' is given, that becomes the
tied object's parent object.
AUTHOR
Ken MacLeod, ken@bitsko.slc.ut.us
SEE ALSO
perl(1), Data::Grove(3)
perl v5.8.0 2000-02-22 Data::Grove::Parent(3)