78 lines
2.0 KiB
Elixir
78 lines
2.0 KiB
Elixir
defmodule MapSets do
|
|
use Koans
|
|
|
|
@intro "My name is Set, MapSet."
|
|
|
|
@set MapSet.new([1, 2, 3, 4, 5])
|
|
|
|
koan "I am very similar to a list" do
|
|
assert Enum.fetch(@set, 0) == {:ok, ___}
|
|
end
|
|
|
|
koan "However, I do not allow duplication" do
|
|
new_set = MapSet.new([1, 1, 2, 3, 3, 3])
|
|
|
|
assert MapSet.size(new_set) == ___
|
|
end
|
|
|
|
koan "You cannot depend on my order" do
|
|
new_set = MapSet.new 1..33
|
|
ordered_list = Enum.to_list 1..33
|
|
set_list = MapSet.to_list(new_set)
|
|
assert (ordered_list == set_list) == ___
|
|
assert (ordered_list == Enum.sort(set_list)) == ___
|
|
end
|
|
# Note: The number "33" is actually special here. Erlang uses a different
|
|
# implementation for maps after 32 elements which does not maintain order.
|
|
# http://stackoverflow.com/a/40408469
|
|
|
|
koan "Does this value exist in the map set?" do
|
|
assert MapSet.member?(@set, 3) == ___
|
|
end
|
|
|
|
koan "I am merely another collection but, you can perform some operations on me" do
|
|
new_set = MapSet.new(@set, fn x -> 3 * x end)
|
|
|
|
assert MapSet.member?(new_set, 15) == ___
|
|
assert MapSet.member?(new_set, 1) == ___
|
|
end
|
|
|
|
koan "Add this value into a map set" do
|
|
modified_set = MapSet.put(@set, 6)
|
|
|
|
assert MapSet.member?(modified_set, 6) == ___
|
|
end
|
|
|
|
koan "Delete this value from the map set" do
|
|
modified_set = MapSet.delete(@set, 1)
|
|
|
|
assert MapSet.member?(modified_set, 1) == ___
|
|
end
|
|
|
|
koan "How large is my map set?" do
|
|
assert MapSet.size(@set) == ___
|
|
end
|
|
|
|
koan "Are these maps twins?" do
|
|
new_set = MapSet.new([1, 2, 3])
|
|
|
|
assert MapSet.equal?(@set, new_set) == ___
|
|
end
|
|
|
|
koan "I want only the common values in both sets" do
|
|
intersection_set = MapSet.intersection(@set, MapSet.new([5, 6, 7]))
|
|
|
|
assert MapSet.member?(intersection_set, 5) == ___
|
|
end
|
|
|
|
koan "Unify my sets" do
|
|
new_set = MapSet.union(@set, MapSet.new([1, 5, 6, 7]))
|
|
|
|
assert MapSet.size(new_set) == ___
|
|
end
|
|
|
|
koan "I want my set in a list" do
|
|
assert MapSet.to_list(@set) == ___
|
|
end
|
|
end
|