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amatch - Approximate Matching Extension for Ruby¶ ↑
DescriptionThis is a collection of classes that can be used for Approximate matching, searching, and comparing of Strings. They implement algorithms that compute the Levenshtein edit distance, Sellers edit distance, the Hamming distance, the longest common subsequence length, the longest common substring length, the pair distance metric, the Jaro-Winkler metric.
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InstallationIntall Ruby
https://www.ruby-lang.org/en/documentation/installation/
To install this extension as a gem type
# gem install amatch
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Examples in Terminal$ irb require 'amatch' # => true include Amatch # => Object m = Sellers.new("pattern") # => #<Amatch::Sellers:0x40366324> m.match("pattren") # => 2.0 m.substitution = m.insertion = 3 # => 3 m.match("pattren") # => 4.0 m.reset_weights # => #<Amatch::Sellers:0x40366324> m.match(["pattren","parent"]) # => [2.0, 4.0] m.search("abcpattrendef") # => 2.0 m = Levenshtein.new("pattern") # => #<Amatch::Levenshtein:0x4035919c> m.match("pattren") # => 2 m.search("abcpattrendef") # => 2 "pattern language".levenshtein_similar("language of patterns") # => 0.2 m = Hamming.new("pattern") # => #<Amatch::Hamming:0x40350858> m.match("pattren") # => 2 "pattern language".hamming_similar("language of patterns") # => 0.1 m = PairDistance.new("pattern") # => #<Amatch::PairDistance:0x40349be8> m.match("pattr en") # => 0.545454545454545 m.match("pattr en", nil) # => 0.461538461538462 m.match("pattr en", /t+/) # => 0.285714285714286 "pattern language".pair_distance_similar("language of patterns") # => 0.928571428571429 m = LongestSubsequence.new("pattern") # => #<Amatch::LongestSubsequence:0x4033e900> m.match("pattren") # => 6 "pattern language".longest_subsequence_similar("language of patterns") # => 0.4 m = LongestSubstring.new("pattern") # => #<Amatch::LongestSubstring:0x403378d0> m.match("pattren") # => 4 "pattern language".longest_substring_similar("language of patterns") # => 0.4 m = Jaro.new("pattern") # => #<Amatch::Jaro:0x363b70> m.match("paTTren") # => 0.952380952380952 m.ignore_case = false m.match("paTTren") # => 0.742857142857143 "pattern language".jaro_similar("language of patterns") # => 0.672222222222222 m = JaroWinkler.new("pattern") # #<Amatch::JaroWinkler:0x3530b8> m.match("paTTren") # => 0.971428571712403 m.ignore_case = false m.match("paTTren") # => 0.79428571505206 m.scaling_factor = 0.05 m.match("pattren") # => 0.961904762046678 "pattern language".jarowinkler_similar("language of patterns") # => 0.672222222222222
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AuthorFlorian Frank flori@ping.de
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LicenseThis is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License Version 2 as published by the Free Software Foundation: www.gnu.org/copyleft/gpl.html