Just require string_scorer into your Ruby code and use the String#score method to find out the score for a matching string. Especially useful for sorting arrays of strings in search results etc...

require 'string_scorer'

string = "Hello, World"

puts string.score("xyz")                        # => 0.0
puts string.score("Hello World")                # => 0.915384615384615
puts string.score("H,W")                        # => 0.642307692307692
puts string.score("orl")                        # => 0.353846153846154
puts string.score("ll")                         # => 0.707692307692308

puts string.score("xyz", :quicksilver)          # => 0.0
puts string.score("Hello World", :quicksilver)  # => 0.708333333333333
puts string.score("H,W", :quicksilver)          # => 0.568402777777778
puts string.score("orl", :quicksilver)          # => 0.75
puts string.score("ll", :quicksilver)           # => 0.766666666666667

You can use different scoring algorithms. Out of the box this comes with a direct port of the QuickSilver algorithm and the adapted LiquidMetal one.

LiquidMetal scorer is faster with longer strings and also handles case differences better.

It's easy to create other scoring algorithms, just look at any of the files in lib/string_scorer/scorers directory

Copyright (c) 2009 Bodaniel Jeanes

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