Class: Monolens::Core::Mapping

Inherits:
Object
  • Object
show all
Includes:
Lens
Defined in:
lib/monolens/stdlib/core/mapping.rb

Instance Attribute Summary

Attributes included from Lens

#options

Instance Method Summary collapse

Methods included from Lens

#fail!, included, #initialize

Methods included from Lens::FetchSupport

#fetch_on

Instance Method Details

#call(arg, world = {}) ⇒ Object 



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# File 'lib/monolens/stdlib/core/mapping.rb', line 15

def call(arg, world = {})
  original_arg = arg
  if key_hash = option(:key_hash, nil)
    arg = key_hash.call(arg, world)
  end

  option(:defn, option(:values, {})).fetch(arg) do
    on_missing(original_arg, world)
  end
end