calculates the Levenshtein distance between two sequences
DescriptionThe Levenshtein distance is a metric for measuring the amount of difference between two sequences (i.e., the so called edit distance). The Levenshtein distance between two sequences is given by the minimum number of operations needed to transform one sequence into the other, where an operation is an insertion, deletion, or substitution of a single element. This Ruby library can work on strings, arrays or any other objects provided the sequences respond to :each and the objects to :hash and :eql?.
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