File locking, database file handling, directory manipulation and more. This module also covers Perl's format and write commands used for traditional text formatting applications, but now of specialist interest.
This topic is presented on public courses
Perl for Larger Projects,
Extra Day
Examples from our training material
| bchop | Random access to a file - using a binary chop |
| flockdemo | Co-operative file locing with flock |
| ftype | Establishing the type of a file system object |
| huge | finding lost disc space - hunting for huge files |
| huge2 | A progress line - hunting for huge files |
| loglook | reading a specific number of bytes |
| ndd | Accessing NDBM files |
| nf | Use of $! to find out why an action failed |
| nopen | $! in a string and a numeric context |
| pfc | Copying a file block by block |
| pls | Four ways of finding the contents of a directory |
| recur | recursively scanning directories |
| webfiles | Using typeglobs to handle an effective array of files |
| wr_loop | Using file locking constants |
Background information
Some modules are
available for download as a sample of our material or under an
Open Training Notes License for free download from
http://www.training-notes.co.uk.
Topics covered in this module
Basic file handling.
Opening files.
Reading from file.
Writing to file.
Enquiring about a file.
Other uses of the file interface.
Arrays of file handles.
Directory Handling.
Going recursive.
Random access files.
An example using a sorted, fixed-length record file.
File Locking.
Alternative schemes.
Database files.
Built-in file system handlers.
Complete learning
If you are looking for a complete course and not just a information on a single subject, visit our
Listing and schedule page.
Well House Consultants specialise in training courses in
Python,
Perl,
PHP, and
MySQL. We run
Private Courses throughout the UK (and beyond for longer courses), and
Public Courses at our training centre in Melksham, Wiltshire, England.
It's surprisingly cost effective to come on our public courses -
even if
you live in a different
country or continent to us.
We have a technical library of over 600 books on the subjects on which we teach.
These books are available for reference at our training centre. Also
available is the Opentalk
Forum for discussion of technical questions.