Class: Picky::Query::Combinations

Inherits:
Object
  • Object
show all
Defined in:
lib/picky/query/combinations.rb

Overview

Combinations represent an ordered list of Combination s.

Combinations contain methods for calculating score (including the boost) and ids for each of its Combination s.

They are the core of an Allocation. An Allocation consists of a number of Combinations.

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(combinations = []) ⇒ Combinations

Returns a new instance of Combinations.



22
23
24
 
# File 'lib/picky/query/combinations.rb', line 22

def initialize combinations = []
  @combinations = combinations
end

Instance Attribute Details

#combinations ⇒ Object (readonly)

Returns the value of attribute combinations.



15
16
17
 
# File 'lib/picky/query/combinations.rb', line 15

def combinations
  @combinations
end

Instance Method Details

#each(&block) ⇒ Object

TODO



28
29
30
 
# File 'lib/picky/query/combinations.rb', line 28

def each &block
  @combinations.each &block
end

#remove(categories = []) ⇒ Object

Filters the tokens and categories such that categories that are passed in, are removed.

Note: This method is not totally independent of the calculate_ids one. Since identifiers are only nullified, we need to not include the ids that have an associated identifier that is nil.



47
48
49
50
51
 
# File 'lib/picky/query/combinations.rb', line 47

def remove categories = []
  # TODO Do not use the name, but the category.
  #
  @combinations.reject! { |combination| categories.include?(combination.category_name) }
end

#score ⇒ Object

Sums up the weights of the combinations.

Note: Optimized sum(&:weight) away – ~3% improvement.



36
37
38
 
# File 'lib/picky/query/combinations.rb', line 36

def score
  @combinations.inject(0) { |total, combination| total + combination.weight }
end

#to_qualifiers ⇒ Object 



59
60
61
 
# File 'lib/picky/query/combinations.rb', line 59

def to_qualifiers
  @combinations.map &:category_name
end

#to_result ⇒ Object 



55
56
57
 
# File 'lib/picky/query/combinations.rb', line 55

def to_result
  @combinations.map &:to_result
end

#to_s ⇒ Object 



65
66
67
 
# File 'lib/picky/query/combinations.rb', line 65

def to_s
  @combinations.to_s
end