Arrays
An array is a container class
that holds a collection of objects indexed by an integer. Any kind of
object may be stored in an array, and any given array can store a
heterogeneous mix of object types. Arrays grow as you add elements.
Arrays can be created using array.new or via
literals. An array expression is a series of values between brackets
[ ]:
[]An empty array (with no elements)
[1, 2, 3]An array of three elements
[1, [2, 3]]A nested array
General delimited string array
You can construct
arrays of strings using the shortcut notation, %W.
Only whitespace characters and closing parentheses can be escaped in
the following notation:
%w(foo bar baz) # ["foo", "bar", "baz"]
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