The Well-Grounded Rubyist, Second Edition

9.2. Collection handling with arrays

Arrays are the bread-and-butter way to handle collections of objects. We’ll put arrays through their paces in this section: we’ll look at the varied techniques available for creating arrays; how to insert, retrieve, and remove array elements; combining arrays with each other; transforming arrays (for example, flattening a nested array into a one-dimensional array); and querying arrays as to their properties and state.

9.2.1. Creating a new array

You can create an array in one of four ways:

• With the Array.new method
• With the literal array constructor (square brackets)
• With a top-level method called Array
• With the special %w{...} and %i{...} notations

You’ll see all of these techniques in heavy rotation in ...