Tie::StdHandle(3pm) Perl Programmers Reference Guide Tie::StdHandle(3pm)NAME
Tie::StdHandle - base class definitions for tied handles
SYNOPSIS
package NewHandle;
require Tie::Handle;
@ISA = qw(Tie::Handle);
sub READ { ... } # Provide a needed method
sub TIEHANDLE { ... } # Overrides inherited method
package main;
tie *FH, 'NewHandle';
DESCRIPTION
The Tie::StdHandle package provide most methods for file handles described in perltie (the exceptions are "UNTIE" and "DESTROY"). It
causes tied file handles to behave exactly like standard file handles and allow for selective overwriting of methods.
perl v5.18.2 2014-01-06 Tie::StdHandle(3pm)
Check Out this Related Man Page
Tie::Handle(3pm) Perl Programmers Reference Guide Tie::Handle(3pm)NAME
Tie::Handle - base class definitions for tied handles
SYNOPSIS
package NewHandle;
require Tie::Handle;
@ISA = qw(Tie::Handle);
sub READ { ... } # Provide a needed method
sub TIEHANDLE { ... } # Overrides inherited method
package main;
tie *FH, 'NewHandle';
DESCRIPTION
This module provides some skeletal methods for handle-tying classes. See perltie for a list of the functions required in tying a handle to
a package. The basic Tie::Handle package provides a "new" method, as well as methods "TIEHANDLE", "PRINT", "PRINTF" and "GETC".
For developers wishing to write their own tied-handle classes, the methods are summarized below. The perltie section not only documents
these, but has sample code as well:
TIEHANDLE classname, LIST
The method invoked by the command "tie *glob, classname". Associates a new glob instance with the specified class. "LIST" would
represent additional arguments (along the lines of AnyDBM_File and compatriots) needed to complete the association.
WRITE this, scalar, length, offset
Write length bytes of data from scalar starting at offset.
PRINT this, LIST
Print the values in LIST
PRINTF this, format, LIST
Print the values in LIST using format
READ this, scalar, length, offset
Read length bytes of data into scalar starting at offset.
READLINE this
Read a single line
GETC this
Get a single character
CLOSE this
Close the handle
OPEN this, filename
(Re-)open the handle
BINMODE this
Specify content is binary
EOF this
Test for end of file.
TELL this
Return position in the file.
SEEK this, offset, whence
Position the file.
Test for end of file.
DESTROY this
Free the storage associated with the tied handle referenced by this. This is rarely needed, as Perl manages its memory quite well. But
the option exists, should a class wish to perform specific actions upon the destruction of an instance.
MORE INFORMATION
The perltie section contains an example of tying handles.
COMPATIBILITY
This version of Tie::Handle is neither related to nor compatible with the Tie::Handle (3.0) module available on CPAN. It was due to an
accident that two modules with the same name appeared. The namespace clash has been cleared in favor of this module that comes with the
perl core in September 2000 and accordingly the version number has been bumped up to 4.0.
perl v5.16.2 2012-08-26 Tie::Handle(3pm)
Split large xml into mutiple files and with header and footer in file
tried below
it splits unevenly and also i need help in adding header and footer
command :
csplit -s -k -f my_XML_split.xml extrfile.xml "/<Document>/" {1}
sample xml
<?xml version="1.0" encoding="UTF-8"?><Recipient>... (36 Replies)
Here are instructions to clear the data cache for four browsers, Safari, Chrome, Firefox, Opera. In these examples I'm using MacOS Mojave, but it should be similar for any OS.
You can use these instructions to to clear and reload the cache if you have any issues with the Vue.js UserCP (current... (1 Reply)
Yesterday someone asked me to install TeamViewer and share my Mac screen with them while on a conference call.
I shut down my Mac before sleeping and woke up to some major problem with my 12-core CPU in hyperdrive, and the system activity monitor showed my Mac kernel_task was at 1,200% and the... (30 Replies)
What is the point of this? Whenever I close my shell it appends to the history file without adding this. I have never seen it overwrite my history file.
# When the shell exits, append to the history file instead of overwriting it
shopt -s histappend (3 Replies)
Hi,
I am attempting to extract the /lib/ paths using sed but it does not appear to work.
./copy_chroot_lib.sh ls echo | sed s#*\(/lib\).*#\1#g
linux-vdso.so.1 (0x00007fff77df1000)
libselinux.so.1 => /lib/x86_64-linux-gnu/libselinux.so.1 (0x00007f28190ac000)
... (8 Replies)
hi,
I am searching for a native tool on MacOS that can increase the resolution of a group of image files whose aspect ratios (file width versus height) vary widely. There are numerous files so I don't wish to do this manually. Someone suggested the sips command with the resampling option but... (5 Replies)
I'm trying to use a bash script for a psych experiment that involves listening to sound files and responding. If I have something like the code below, how can I make sure that a key press is assigned to RESPONSE only after the second echo statement?
for i in 1 2 3; do
echo "Ready?"
sleep 2
... (10 Replies)
Hi all...
Well guys and gals, I jumped in at the deep end and found things that PERL cannot do by default.
Many tricky terminal escape codes are not catered for so I had to create workarounds.
One thing I searched for was this:
Passing perl variable to shell command
AND, @Neo this was... (15 Replies)
Python 3.8.0rc1 released today, 1st October 2019...
Just tried it out testing my AMIGA Python 1.4.0 code inside it and all are working, I can now test to the latest Python incarnation now.
Subjective opinion is that is seems seriously quick on my OSX 10.14.6, latest Mojave update.
Python... (0 Replies)
Hi Guys,
I wrote a collection of bash functions years ago and now need to use them again but
I'm getting some error messages when eval tries to expand the variables names.
I recollect that I used the shopt command to set one of the options but I can't quite
remember the command that I... (8 Replies)
I'm trying to complete a bash script to capture if an external webcam is active in a video conference session. Some users will switch the camera to the built-in MAC camera. When this happens I want to trigger a set of events.
Things tried: reviewed the console.app to look for patterns on when... (6 Replies)