Module: Enumerable

Defined in:
lib/key_path/enumerable/extensions.rb

Instance Method Summary collapse

Instance Method Details

#set_keypath(keypath, value) ⇒ Object 



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# File 'lib/key_path/enumerable/extensions.rb', line 22

def set_keypath(keypath, value)
  # handle both string and KeyPath::Path forms
  keypath = keypath.to_keypath if keypath.is_a?(String)

  keypath_parts = keypath.to_a
  # Return self if path empty
  return self if keypath_parts.empty?

  key = keypath_parts.shift
  # Just assign value to self when it's a direct path
  # Remember, this is after calling keypath_parts#shift
  if keypath_parts.length == 0
    key = key.is_number? ? Integer(key) : key.to_sym

    self[key] = value
    return self
  end

  # keypath_parts.length > 0
  # Remember, this is after calling keypath_parts#shift
  collection = if key.is_number?
    Array.new
  else
    Hash.new
  end

  # Remember, this is after calling keypath_parts#shift
  collection.set_keypath(keypath_parts.join('.'), value)

  # merge the new collection into self
  self[key] = collection
end

#value_at_keypath(keypath) ⇒ Object

see: stackoverflow.com/a/7139631/83386



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# File 'lib/key_path/enumerable/extensions.rb', line 3

def value_at_keypath(keypath)
  keypath = keypath.to_s if keypath.is_a?(KeyPath::Path)

  parts = keypath.split '.', 2

  # if it's an array, call the index
  if self[parts[0].to_i]
    match = self[parts[0].to_i]
  else
    match = self[parts[0]] || self[parts[0].to_sym]
  end

  if !parts[1] || match.nil?
    return match
  else
    return match.value_at_keypath(parts[1])
  end
end