Class: ClosestNeighbours::Grouper

Inherits:
Object
  • Object
show all
Defined in:
lib/closest_neighbours/grouper.rb

Overview

Split an Enumerable into specified number of groups containing the closest elements in each group.

Defined Under Namespace

Classes: GrouperHelper

Instance Method Summary collapse

Constructor Details

#initialize(orderer: DefaultOrder.new) ⇒ Grouper

Returns a new instance of Grouper.



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# File 'lib/closest_neighbours/grouper.rb', line 8

def initialize(orderer: DefaultOrder.new)
  @orderer = orderer
end

Instance Method Details

#call(groups = 1, data = []) ⇒ Object

Raises:



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# File 'lib/closest_neighbours/grouper.rb', line 12

def call(groups = 1, data = [])
  raise NonIntegerGroupsError unless groups.is_a? Integer
  raise NonEnumberableArgumentError unless data.is_a? Enumerable
  raise InsufficientGroupsError if groups < 1
  raise IncomparableElementError unless data.all? { |e| e <=> data.first }

  GrouperHelper.new(groups, orderer.call(data)).call
end