Class: Accessory::Accessors::AllAccessor

Inherits:
Accessory::Accessor show all
Defined in:
lib/accessory/accessors/all_accessor.rb

Overview

Traverses all elements of an Enumerable.

Aliases

Equivalents in Elixir’s Access module

Default constructor used by predecessor accessor

  • Array.new

Instance Method Summary collapse

Methods inherited from Accessory::Accessor

#traverse, #traverse_or_default

Instance Method Details

#get(data, &succ) ⇒ Array

Feeds each element of data down the accessor chain, and returns the results.

Parameters:

  • data (Enumerable) —

    the Enumerable to iterate through

Returns:

  • (Array) —

    the values derived from the rest of the accessor chain



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# File 'lib/accessory/accessors/all_accessor.rb', line 35

def get(data, &succ)
  if succ
    (data || []).map(&succ)
  else
    data
  end
end

#get_and_update(data) ⇒ Array

Feeds each element of data down the accessor chain, overwriting data with the results.

If :pop is returned from the accessor chain, the element is dropped from the new data.

Parameters:

  • data (Enumerable) —

    the Enumerable to iterate through

Returns:

  • (Array) —

    a two-element array containing 1. the original values found during iteration; and 2. the new data



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# File 'lib/accessory/accessors/all_accessor.rb', line 50

def get_and_update(data)
  results = []
  new_data = []
  dirty = false

  (data || []).each do |pos|
    case yield(pos)
    in [:clean, result, _]
      results.push(result)
      new_data.push(pos)
      # ok
    in [:dirty, result, new_value]
      results.push(result)
      new_data.push(new_value)
      dirty = true
    in :pop
      results.push(pos)
      dirty = true
    end
  end

  if dirty
    [:dirty, results, new_data]
  else
    [:clean, results, data]
  end
end