Containers

Containers are functional like data structures that help provide greater runtime safety and polymorphism.

Protocols

• Appenedable - A container that provies an interface of append. Safe against nil values. Namely when passing a container with the value nil into either the first of second argument to append, the other value is not change and there is no runtime error.
• Mappable - A container that provies an interface to map. When map is called on a container that has a nil value that container just passes through with out the mapping function being called, and this helps prevent runtime errors.
• Sequenceable - A container that provides an interface of next. This allows the chaining of computations.
• Unwrappable - A container that provides an interface to safe and unsafe unwrapping of inner value. Safe will need a default in case of nil value of container, helping prevent runtime errors. Unsafe will just return the value of the container regardless of a nil value potentially causing runtime errors

Since these are protocols, and highly decoupled, a developer can implement them as needed on their own structs.

Installation

The package can be installed by adding containers to your list of dependencies in mix.exs:

def deps do
  [{:containers, "~> 0.1.0"}]
end