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For 2023 (and 2024 ...) - 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 Our training notes are now very much out of date, but due to upward compatability most of our examples remain operational and even relevant ad you are welcome to make us if them "as seen" and at your own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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Ruby module R112
Exercises, examples and other material relating to training module R112. This topic is presented on public courses Learning to program in Ruby, Ruby Programming

Articles and tips on this subjectupdated
4680Processing data line by line - iterator in Ruby with yield
If you have a big file / flow of data in Ruby, you probably don't want to read it all in to an array before you do any processing. Not only would that mean you couldn't produce any output until you have read all the data, but it would also make for a big process - probably inefficient, possibly doing ...
3156Splitting data reading code from data processing code - Ruby
An iterator (a.k.a. generator in Python) is a function which returns its results as it calculates them, rather than building them up into a larger structure to return all at once when the function is completed. So where you have a big flow of incoming data, you can handle it as it arrives rather than ...
2979Ruby - yield; parallel routines
When you call a function / method in your program, you expect it to run to completion before returning control to you, passing back a result. For example, you might call a method to read a series of objects and store them into an array ... and then you could take that array of objects and, iterating ...
Examples from our training material
faucet   a series of methods in a production line
feeder   yield and iterator - practical example
lynes.rb   How to write and use an iterator
papo   yield - calling back to a code block
tap   Reading a file in parallel to processing
ytb.rb   Your own data iterator
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
Parallel assigments. Yield.
Threads, the thread scheduler and thread exceptions.
Thread critical, Mutex and Condition variables.
Spawning processes and controlling children.
Allowing your children to go independent.
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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