A.Vector.fetch
You're seeing just the function
fetch
, go back to A.Vector module for more information.
Specs
Finds the element at the given index
(zero-based), and returns it in a ok-entry.
If the index
does not exist, returns :error
.
Supports negative indexing from the end of the vector
.
Runs in effective constant time.
Examples
iex> A.Vector.new(1..1_000) |> A.Vector.fetch(555)
{:ok, 556}
iex> A.Vector.new(1..1_000) |> A.Vector.fetch(1_000)
:error
iex> A.Vector.new(1..1_000) |> A.Vector.fetch(-1)
{:ok, 1000}