class Optics::IxLens
Public Class Methods
new(index)
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Calls superclass method
Optics::Lens::new
# File lib/optics.rb, line 38 def initialize(index) super( -> (subject) { subject[index] }, -> (subject, new_value) { subject.each_with_index.map { |old_value, value_index| value_index == index ? new_value : old_value } } ) end