Class: FuzzyMatch::Rule::Grouping

Inherits:
FuzzyMatch::Rule show all
Defined in:
lib/fuzzy_match/rule/grouping.rb

Overview

“Record linkage typically involves two main steps: grouping and scoring…” en.wikipedia.org/wiki/Record_linkage

Groupings effectively divide up the haystack into groups that match a pattern

A grouping (formerly known as a blocking) comes into effect when a str matches. Then the needle must also match the grouping’s regexp.

Instance Attribute Summary

Attributes inherited from FuzzyMatch::Rule

#regexp

Instance Method Summary collapse

Methods inherited from FuzzyMatch::Rule

#==, #initialize

Constructor Details

This class inherits a constructor from FuzzyMatch::Rule

Instance Method Details

#join?(str1, str2) ⇒ Boolean

If a grouping “joins” two strings, that means they both fit into it.

Returns false if they certainly don’t fit this grouping. Returns nil if the grouping doesn’t apply, i.e. str2 doesn’t fit the grouping.

Returns:

  • (Boolean) 


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# File 'lib/fuzzy_match/rule/grouping.rb', line 19

def join?(str1, str2)
  if str2_match_data = regexp.match(str2)
    if str1_match_data = regexp.match(str1)
      str2_match_data.captures.join.downcase == str1_match_data.captures.join.downcase
    else
      false
    end
  else
    nil
  end
end

#match?(str) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/fuzzy_match/rule/grouping.rb', line 11

def match?(str)
  !!(regexp.match(str))
end