Class: Monolens::Array::Map

Inherits:
Object
  • Object
show all
Includes:
Lens
Defined in:
lib/monolens/array/map.rb

Instance Attribute Summary

Attributes included from Lens

#options

Instance Method Summary collapse

Methods included from Lens::FetchSupport

#fetch_on

Constructor Details

#initialize(arg) ⇒ Map

Returns a new instance of Map.



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# File 'lib/monolens/array/map.rb', line 6

def initialize(arg)
  options, lenses = case arg
  when ::Hash
    opts = arg.dup; opts.delete(:lenses)
    _, ls = fetch_on(:lenses, arg)
    raise ArgumentError, 'Lenses are required' if ls.nil?
    [ opts, ls ]
  else
    [{}, arg]
  end
  super(options)
  @lenses = Monolens.lens(lenses)
end

Instance Method Details

#call(arg, world = {}) ⇒ Object 



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# File 'lib/monolens/array/map.rb', line 20

def call(arg, world = {})
  is_enumerable!(arg, world)

  result = []
  arg.each_with_index do |a, i|
    deeper(world, i) do |w|
      begin
        result << @lenses.call(a, w)
      rescue Monolens::LensError => ex
        strategy = option(:on_error, :fail)
        handle_error(strategy, ex, result, world)
      end
    end
  end
  result
end