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Ruby module R113
Further Input and Output
Exercises, examples and other material relating to training module R113. This module is presented on Private Courses and Specially Run Courses only




Articles and tips on this subjectupdated
4678Expect with Ruby - a training example to get you started
The Expect library, originally written for use wth Tcl, is also available in other languages and today I wrote an example to introduce how it's used in Ruby. Please note this is a spike solution - not going to fail (if it does) in a pretty way. The principle of expect is that you spawn a process - ...
2016-05-18
 
4676Running shell (operating system) commands from within Ruby
Ruby is an excellent systems admin / scripting tool, allowing other shells and processes to be run from within a Ruby program in various ways. Using backtics or the %x notation, commeand output on STDOUT is routed back into a variable - for example:   first = `grep -c option247 ac_20160516 ...
2016-05-18
 
4553RUby - loading, using, changing, storing JSON format data
json is an excellent data exchange format - it "serialises" a data structure that consists of arrays and hashes (or whatever ordered and unordered collections are called in the language you're using) so that the structure can be saved, transferred between programs and computers, and reloaded easily. All ...
2015-10-23
 
4502Reading and parsing a JSON object in Ruby
Here's a series of three new examples, building up from one another, showing the reading of a JSON feed from a remote web site in Ruby, and the analysis and presentation of that data. The first example - [here] - shows the loading of extra modules to handle reading from the web and the JSON format, ...
2015-06-02
 
4008Reading and checking user inputs - first lessons - Ruby
Early programming exercises on a "learning to program in Xxxx" course involve asking the user to enter some pieces of data (usually numbers), doing a calculation using those numbers, and printing out a result. For that's a quite common requirement for a simple program - and this is the first realistic ...
2013-02-17
 
Examples from our training material
cashell   Calling Shell commands from Ruby
exprub   Ruby server check with Ruby - Expect
jload   making use of data in a JSON object
tj3.rb   Descending into a complex (json) object
wread   Read a web resource into a program
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
File objects - finding our about files.
File system handling - glob, seek, tell, mkdir, etc.
Network programming.
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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