TermSimilarity class abstract

A static/abstract class that exposes methods for computing similarity of terms.

Constructors

TermSimilarity(String term, String other, {int k = 2})
Returns a immutable TermSimilarity for term and other.
factory

Properties

characterSimilarity → double
Returns the similarity between the collection of letters of term and other on a scale of 0.0 to 1.0.
no setter
editDistance → int
Returns the Damerau–Levenshtein distance, the minimum number of single-character edits (transpositions, insertions, deletions or substitutions) required to change term into other.
no setter
editSimilarity → double
A normalized measure of editDistance on a scale of 0.0 to 1.0.
no setter
hashCode → int
The hash code for this object.
no setterinherited
jaccardSimilarity → double
Returns the Jaccard Similarity Index between term and other.
no setter
lengthDistance → int
Returns the absolute value of the difference in length between term and other.
no setter
lengthSimilarity → double
Returns the similarity in length between two terms, defined as: lengthSimilarity = 1 minus the log of the ratio between the term lengths, with a floor at 0.0: 1-(log(this.length/other.length))
no setter
other → String
The term that is being compared to term.
no setter
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited
similarity → double
The compound similarity value on a scale of 0.0 to 1.0.
no setter
startsWithSimilarity → double
Compares the starting charcters of the String with that of other, limiting the comparison to a substring of this or other that is the shorter of this.length or other.length. ///
no setter
term → String
The term that is being compared to other.
no setter

Methods

compareTo(TermSimilarity other) → int
Compares this to other.
noSuchMethod(Invocation invocation) → dynamic
Invoked when a nonexistent method or property is accessed.
inherited
toJson() → Map<String, dynamic>
Serializes the TermSimilarity to Map<String, dynamic>.
toString() → String
A string representation of this object.
inherited

Operators

operator ==(Object other) → bool
The equality operator.
inherited

Static Methods

characterSimilarities(String term, Iterable<String> terms) → List<SimilarityIndex>
Returns a ordered list of SimilarityIndex values for the terms, in descending order of SimilarityIndex.similarity.
editDistanceMap(String term, Iterable<String> terms) → Map<String, int>
Returns a hashmap of terms to their editDistance with this.
editSimilarities(String term, Iterable<String> terms) → List<SimilarityIndex>
Returns a ordered list of SimilarityIndex values of term to the terms in descending order of SimilarityIndex.similarity.
getSuggestions(String term, Iterable<String> terms, {int limit = 10, int k = 2, double greaterThan = 0.10}) → List<SimilarityIndex>
Returns a collection of SimilarityIndexs for this String from terms.
jaccardSimilarities(String term, Iterable<String> terms, [int k = 2]) → List<SimilarityIndex>
Returns a ordered list of SimilarityIndex values of term to the terms in descending order of SimilarityIndex.similarity using a k-gram length of k. k defaults to 2.
kGrams(String term, [int k = 2]) → Set<String>
Returns a set of (lower-case) k-grams in the term.
lengthSimilarities(String term, Iterable<String> terms) → List<SimilarityIndex>
Returns a ordered list of SimilarityIndex values for the terms, in descending order of SimilarityIndex.similarity.
matches(String term, Iterable<String> terms, {int limit = 10, int k = 2, double greaterThan = 0.10}) → List<String>
Returns the best matches for a term from terms, in descending order of term similarity (best match first).
startsWithSimilarities(String term, Iterable<String> terms) → List<SimilarityIndex>
Returns a ordered list of SimilarityIndex values for the terms, in descending order of SimilarityIndex.similarity.
termSimilarities(String term, Iterable<String> terms, {int k = 2}) → List<TermSimilarity>
Returns a ordered list of SimilarityIndex values for the terms, in descending order of SimilarityIndex.similarity.
termSimilarityMap(String term, Iterable<String> terms, {int k = 2}) → Map<String, TermSimilarity>
Returns an hashmap of terms to TermSimilarity with term.