class Array(T)
Overview
An Array
is an ordered, integer-indexed collection of objects of type T.
Array indexing starts at 0. A negative index is assumed to be relative to the end of the array: -1 indicates the last element, -2 is the next to last element, and so on.
An Array
can be created using the usual new
method (several are provided), or with an array literal:
Array(Int32).new # => []
[1, 2, 3] # Array(Int32)
[1, "hello", 'x'] # Array(Int32 | String | Char)
See Array
literals in the language reference.
An Array
can have mixed types, meaning T will be a union of types, but these are determined
when the array is created, either by specifying T or by using an array literal. In the latter
case, T will be set to the union of the array literal elements' types.
When creating an empty array you must always specify T:
[] of Int32 # same as Array(Int32)
[] # syntax error
An Array
is implemented using an internal buffer of some capacity
and is reallocated when elements are pushed to it when more capacity
is needed. This is normally known as a dynamic array.
You can use a special array literal syntax with other types too, as long as they define an argless
new
method and a <<
method. Set
is one such type:
set = Set{1, 2, 3} # => Set{1, 2, 3}
set.class # => Set(Int32)
The above is the same as this:
set = Set(typeof(1, 2, 3)).new
set << 1
set << 2
set << 3
Included Modules
- Comparable(Array(T))
- Indexable::Mutable(T)
Defined in:
ssz/codec.crClass Method Summary
Instance Method Summary
Instance methods inherited from module Enumerable(T)
hash_tree_root : Bytes
hash_tree_root,
ssz_basic? : Bool
ssz_basic?,
ssz_encode(io : IO)
ssz_encode,
ssz_size : Int32
ssz_size,
ssz_variable? : Bool
ssz_variable?
Class methods inherited from module Enumerable(T)
ssz_basic? : Bool
ssz_basic?
Instance methods inherited from class Object
ssz_basic? : Bool
ssz_basic?,
ssz_encode(io : IO)ssz_encode : Bytes ssz_encode, ssz_fixed? : Bool ssz_fixed?, ssz_size : Int32 ssz_size, ssz_variable? : Bool ssz_variable?
Class methods inherited from class Object
ssz_basic? : Bool
ssz_basic?,
ssz_decode(io : IO, size : Int32 = 0)ssz_decode(bytes : Bytes) ssz_decode, ssz_fixed? : Bool ssz_fixed?, ssz_variable? : Bool ssz_variable?