Collections (Arrays and Hashes) in Ruby

Collections (Arrays and Hashes) in Ruby - module R107

If you want to hold many values in a Ruby object, you'll use and array or a hash - two powerful structures each of which has a mass of methods to make them flexible, and a great deal of syntactic sugar to make them easy to use.

This topic is presented on public course Ruby Programming

Examples from our training material

a1.rb	First Array
a2.rb	Basic Array manipulation
a3.rb	methods on arrays
arar.rb	arrays of arrays
h1.rb	First hash in Ruby
h2.rb	First hash in Ruby
logan	Read an Apache httpd access log file and count statuses
pophand.rb	Read, interpret a data file
pw.rb	%w to set up an array, and compact
pwc.rb	Copying an object in Ruby

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

What is a collection?
Arrays and hashes.
Constructing an array. The %w shortcut.
Nesting arrays.
Hash keys, iterators, etc.

Complete learning

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