Class: Optics::HashLens

Inherits:

Lens

• Object
• Lens
• Optics::HashLens

Defined in:

lib/optics.rb

Instance Method Summary

• #initialize(key) ⇒ HashLens constructor

  A new instance of HashLens.

Methods inherited from Lens

#combine, #get, #set

Constructor Details

#initialize(key) ⇒ HashLens

Returns a new instance of HashLens.

# File 'lib/optics.rb', line 29

def initialize(key)
  super(
    -> (subject) { subject[key] },
    -> (subject, value) { subject.merge(key => value) }
  )
end