Array

An Array is a collection of objects which can grow or shrink dynamically.

[123, "abc", true, nil]

Alternatively, one can write:

Array(123, "abc", true, nil)

Working with arrays

Elements of an array can be accessed with the special syntax array[i] where i is a zero-based index inside the array.

var array = [1, 2, 3, 4, 5]

array[0] = 6
array[1] = 7

say array

Special arrays

Arrays of strings or numbers can be created with a special syntax:

%w(1 two three)         # same as: ["1", "two", "three"]
%n(1 2.5 3.75)          # same as: [1, 2.5, 3.75]
%i(1 2.5 3.75)          # same as: [1, 2, 3]

Unescaped spaces and unescaped comments are removed. For example, the following declaration:

%w(
    Sidney        # Australia
    New\ York     # U.S.A
)

...is equivalent with ["Sidney", "New York"].

There is also %W(...) which understands escapes and interpolation:

%W(
    hello\tworld
    one\ item         # some comment
    \#{1+2}
)

...which means: ["hello\tworld", "one item", "3"].

Another way is by using the <...> and «...» delimiters:

<I 8 some 3.14>         # same as: ["I", "8", "some", "3.14"]