Islands.Island (Islands Island v0.1.36)
View SourceAn island struct and functions for the Game of Islands.
The island struct contains the fields type, origin, coords and hits
representing the properties of an island in the Game of Islands.
Based on the book Functional Web Development by Lance Halvorsen.
Summary
Types
A set of squares
Grid cell e.g. "a1" or "c3"
A map representing a CSS grid position
An island struct for the Game of Islands
Island type
Functions
Checks if all the squares of island have been hit.
Converts island's origin into a CSS grid position.
Returns {:hit, updated_island}, where updated_island is island
consequently updated if guess was a hit, or :miss otherwise.
Returns a list of hit "cells" relative to the island's origin.
Returns {:ok, island} or {:error, reason} if given an invalid type or
origin.
Returns an island struct or raises if given an invalid type or origin.
Checks if new_island overlaps island.
Types
@type coords() :: MapSet.t(Islands.Coord.t())
A set of squares
@type grid_cell() :: <<_::16>>
Grid cell e.g. "a1" or "c3"
@type grid_position() :: %{ gridColumnStart: Islands.Coord.col(), gridRowStart: Islands.Coord.row() }
A map representing a CSS grid position
@type t() :: %Islands.Island{ coords: coords(), hits: coords(), origin: Islands.Coord.t(), type: type() }
An island struct for the Game of Islands
@type type() :: :atoll | :dot | :l_shape | :s_shape | :square
Island type
Functions
Checks if all the squares of island have been hit.
@spec grid_position(t()) :: grid_position()
Converts island's origin into a CSS grid position.
Examples
iex> alias Islands.{Coord, Island}
iex> {:ok, origin} = Coord.new(2, 3)
iex> {:ok, atoll} = Island.new(:atoll, origin)
iex> Island.grid_position(atoll)
%{gridRowStart: 2, gridColumnStart: 3}@spec guess(t(), Islands.Coord.t()) :: {:hit, t()} | :miss
Returns {:hit, updated_island}, where updated_island is island
consequently updated if guess was a hit, or :miss otherwise.
Returns a list of hit "cells" relative to the island's origin.
Examples
iex> alias Islands.{Coord, Island}
iex> {:ok, origin} = Coord.new(2, 2)
iex> {:ok, atoll} = Island.new(:atoll, origin)
iex> {:ok, a1} = Coord.new(2, 2)
iex> {:ok, b1} = Coord.new(2, 3)
iex> {:ok, a3} = Coord.new(4, 2)
iex> {:hit, atoll} = Island.guess(atoll, a1)
iex> {:hit, atoll} = Island.guess(atoll, b1)
iex> {:hit, atoll} = Island.guess(atoll, a3)
iex> Island.hit_cells(atoll) |> Enum.sort()
["a1", "a3", "b1"]@spec new(type(), Islands.Coord.t()) :: {:ok, t()} | {:error, atom()}
Returns {:ok, island} or {:error, reason} if given an invalid type or
origin.
Examples
iex> alias Islands.{Coord, Island}
iex> {:ok, origin} = Coord.new(1, 1)
iex> {:ok, island} = Island.new(:dot, origin)
iex> %Island{origin: ^origin, coords: coords, hits: hits} = island
iex> {coords, hits}
{MapSet.new([origin]), MapSet.new()}@spec new!(type(), Islands.Coord.t()) :: t()
Returns an island struct or raises if given an invalid type or origin.
Examples
iex> alias Islands.{Coord, Island}
iex> origin = Coord.new!(1, 1)
iex> %Island{coords: coords, hits: hits} = Island.new!(:dot, origin)
iex> {coords, hits}
{MapSet.new([origin]), MapSet.new()}
iex> alias Islands.{Coord, Island}
iex> origin = Coord.new!(10, 9)
iex> Island.new!(:square, origin)
** (ArgumentError) cannot create island, reason: :invalid_island_location
iex> alias Islands.Island
iex> origin = %{row: 10, col: 9}
iex> Island.new!(:square, origin)
** (ArgumentError) cannot create island, reason: :invalid_island_argsChecks if new_island overlaps island.
Examples
iex> alias Islands.{Coord, Island}
iex> square_origin = Coord.new!(1, 1)
iex> atoll_origin = Coord.new!(2, 2)
iex> square = Island.new!(:square, square_origin)
iex> atoll = Island.new!(:atoll, atoll_origin)
iex> Island.overlaps?(atoll, square)
true