Ruby - Further Input and Output

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 subject		updated
4678	Expect 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
4676	Running 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
4553	RUby - 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
4502	Reading 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
4008	Reading 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

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