English class

A TextAnalyzer implementation for English language analysis.

Inheritance
Implemented types

Constructors

English({Map<String, String> termExceptions = const <String, String>{}})
A const constructor to allow an instance to be used as default.
const

Properties

abbreviations → Map<String, String>
A list of common English abbreviations. This list is not exhaustive.
no setter
characterFilter → AsyncTermModifier
A function that filters out unwanted characters or replaces them with other characters.
no setteroverride
hashCode → int
The hash code for this object.
no setterinherited
jsonTokenizer → JsonTokenizer
Extracts tokens from the fields in a JSON document for use in full-text search queries and indexes.
no setterinherited
nGrammer → NGrammer
A language-specific function that generates n-grams from text.
no setterinherited
paragraphSplitter → TextSplitter
Returns a list of paragraphs from text.
no setterinherited
phraseSplitter → PhraseSplitter
Returns a list of keywords from text.
no setterinherited
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited
sentenceSplitter → TextSplitter
Returns a list of sentences from text.
no setterinherited
stemmer → TermModifier
Language-specific function that returns the stem of a term.
no setter
syllableCounter → SyllableCounter
Returns the number of syllables in a string after stripping out all white-space and punctuation.
no setterinherited
termExceptions → Map<String, String>
A map of term exceptions
final
termExpander → TermExpander?
Expands text to a collection of related Strings, e.g. synonyms, abbreviations or spelling suggestions.
no setteroverride
termFilter → AsyncTermModifier
A filter function that returns a modified term or null.
no setterinherited
termSplitter → TextSplitter
Returns a list of words from text.
no setterinherited
tokenizer → Tokenizer
Extracts one or more tokens from text for use in full-text search queries and indexes.
no setterinherited

Methods

asNumber(String term) → num?
Attempts to parse the term to a number. Returns null if the term does not represent a number, amount or percentage
isStopword(String term) → bool
Returns true if the term is a stopword excluded from tokenization.
noSuchMethod(Invocation invocation) → dynamic
Invoked when a nonexistent method or property is accessed.
inherited
toString() → String
A string representation of this object.
inherited

Operators

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

Constants

analyzer → const TextAnalyzer
Instantiates a static const English instance.
kAbbreviations → const Map<String, String>
A list of English abbreviations.
kStopWords → const Set<String>
A collection of stop-words excluded from tokenization.