In Understanding Ruby Variables we looked at storing data (such as numbers, strings and boolean true or false values) in memory locations known as variables. The variable types covered in those chapters were useful for storing one value per variable. Often, however, it is necessary to group together multiple variables into a self contained object. This is where Ruby arrays come in. The objective of this chapter, therefore, is to introduce the concept of Arrays in Ruby and provide an overview of the creation and manipulation of such objects. In the next chapter (Advanced Ruby Arrays) we will look at more ways to work with arrays.

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Ruby supports regular expressions as a language feature. In Ruby, a regular expression is written in the form of /pattern/modifiers where "pattern" is the regular expression itself, and "modifiers" are a series of characters indicating various options. The "modifiers" part is optional.

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There have been many extravagant claims made about Rails. For example, Curt Hibbs' Rolling with Ruby on Railsclaimed that you could develop a web application at least ten times faster with Rails than you could with a typical Java framework... The article then goes on to show how to install Rails and Ruby on a PC and build a working "scaffold" application with virtually no coding.

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