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For 2023 - we are now fully retired from IT training.
We have made many, many friends over 25 years of teaching about Python, Tcl, Perl, PHP, Lua, Java, C and C++ - and MySQL, Linux and Solaris/SunOS too. Our training notes are now very much out of date, but due to upward compatability most of our examples remain operational and even relevant ad you are welcome to make us if them "as seen" and at your own risk.

Lisa and I (Graham) now live in what was our training centre in Melksham - happy to meet with former delegates here - but do check ahead before coming round. We are far from inactive - rather, enjoying the times that we are retired but still healthy enough in mind and body to be active!

I am also active in many other area and still look after a lot of web sites - you can find an index ((here))

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Lua module U110
Input / Output
Exercises, examples and other material relating to training module U110. This topic is presented on public courses Learning to program in Lua, Lua Programming, Lua Programming

Articles and tips on this subjectupdated
3558Python or Lua - which should I use / learn?
"Should I learn and use Python or Lua" - a question to me. The questioner was perceptive, knowing that he shouldn't try to learn lots of languages at the same time, and that he should always limit the "basket" of languages used within his applications - in fact, he was wondering if he could select just ...
2344Reading a data file and sensing EOF in Lua
In Lua, the standard table io includes an io.open code element that lets you open a file. This returns a userdata to you (looks like a table but isn't - it's a C accessible structure) from which you can run the read code. Empty lines return an empty string (in Lua this is a TRUE value, unlike other languages), ...
1841Formatting with a leading + / Lua and Perl
In formatted printing, you can often use a leading "+" in the format string to force a positive sign to be added in front of positive numbers - for example "%+4d" means an integer, to base 10, 4 character positions as a minimum, right justified. Here's an example of that, in code, in Lua for john = ...
1744Lua examples, Lua Courses
Programming training is much more effective if the delegates are shown how a particular program is written, rather than just the final result ... show them just the final result and they'll ask "but how did you come up with that?" So whenever possible, I write new examples in front of my delegates - ...
Examples from our training material
boring   File open, read
emmas   Looking for (and counting) email addresses in a log file
filescan   Finding the latest log file and analysing it (popen, ls)
flapper   file read and write - line by line
flipper   keyboard and screen read and write
grounds.lua   Soccer grounds - Lua
info.txt   Soccer ground data for Lua and Python example
log_counter   Command line and data file use / full course example
loganal   Log file analysis
skill_lister   Processing a file of records, splitting each record
zz   Some file reading fundamentals
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 [here].
Topics covered in this module
Keyboard and screen at a lower level
Opening and closing files.
Reading and writing files.
File status checks and file system operations.
Other file system functions.
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 Ruby, Lua, 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 700 books on the subjects on which we teach. These books are available for reference at our training centre.

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