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Contents
class LooseTightDictionary
# "Record linkage typically involves two main steps: blocking and scoring..."
# http://en.wikipedia.org/wiki/Record_linkage
#
# Blockings effectively divide up the haystack into groups that match a pattern
#
# A blocking (as in a grouping) comes into effect when a str matches.
# Then the needle must also match the blocking's regexp.
class Blocking
attr_reader :regexp
def initialize(regexp_or_str)
@regexp = regexp_or_str.to_regexp
end
def match?(str)
!!(regexp.match(str))
end
# If a blocking "joins" two strings, that means they both fit into it.
#
# Returns false if they certainly don't fit this blocking.
# Returns nil if the blocking doesn't apply, i.e. str2 doesn't fit the blocking.
def join?(str1, str2)
if str2_match_data = regexp.match(str2)
if str1_match_data = regexp.match(str1)
str2_match_data.captures == str1_match_data.captures
else
false
end
else
nil
end
end
end
end
Version data entries
9 entries across 9 versions & 1 rubygems