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Fuzz.PartialTokenSortRatio

Sorted words, compared over the best-matching window.

public static double PartialTokenSortRatio(string a, string b)

public static double PartialTokenSortRatio(string a, string b, TextElement element)

The second overload compares over element. At TextElement.CodePoint a character outside the Basic Multilingual Plane counts once, tokens split on rapidfuzz's own whitespace and sort by code point, which is rapidfuzz's score on any string; TextElement.Utf16Unit is the first overload.

Parameters — a and b are the strings to compare. element is the unit compared, in the second overload only.

Returns — double in [0, 100]: the words are sorted, then PartialRatio is applied.

Exceptions — ArgumentOutOfRangeException when element is not a declared value. ArgumentException when the two strings hold more than 63,455 distinct code points above U+0020, which is what a char can rank one unit per code point; Fuzz.Ratio answers such a pair, these scorers do not yet.

Example — reordered words, scored as a fragment.

using Lodestar.Fuzzy;

double score = Fuzz.PartialTokenSortRatio("new york mets", "mets new york");  // => 100

Remarks — both transformations at once: order stops counting and one side may be a fragment of the other. That is two kinds of forgiveness compounded, so it scores high on pairs a person would call unrelated — which is why it is worth choosing deliberately rather than reaching for as a default.

When the input is not known in advance, WRatio chooses among the scorers instead of applying the most forgiving one unconditionally.

An emoji is two UTF-16 units, so the first overload scores two different emoji that share a high surrogate as half alike, where rapidfuzz scores them 0; pass TextElement.CodePoint when the text can leave the BMP, as decision 0001 offers on every algorithm it affects.

Applies to — net10.0, netstandard2.0.

See also — Fuzz.TokenSortRatio, Fuzz.PartialRatio.