Copy page

Docs

All Operations

Every operation RegexSolver offers, named as in the API Reference and grouped by tag.

Compute

These take one or more terms and return a term. The returned term is a valid input to any other operation, so you can feed it into the next call instead of converting it back to a pattern first.

Operation	Description	Java	JavaScript	Python
Union	Compute the union of the given terms	union	union	union
Intersection	Compute the intersection of the given terms	intersection	intersection	intersection
Difference	Compute the difference between the two given terms	difference	difference	difference
Complement	Compute the complement of the given term	complement	complement	complement
Concatenation	Concatenate the given terms in order	concat	concat	concat
Repeat	Repeat a term between min and max times	repeat	repeat	repeat
Determinize	Compute a deterministic FAIR	determinize	determinize	determinize

See Union, Intersection, Difference and Complement, Concatenation and Repetition and Determinism.

Analyze

These return a boolean, a number or a string, and never modify the term. The ones taking a single term cache their answer on that Term instance; Equivalent and Subset compare two terms and are not cached. See Best Practices.

Operation	Description	Java	JavaScript	Python
Empty	Check if the term matches no strings	isEmpty	isEmpty	is_empty
Totality	Check if the term matches all the possible strings	isTotal	isTotal	is_total
Empty String Only	Check if the term matches only the empty string	isEmptyString	isEmptyString	is_empty_string
Cardinality	Compute how many strings the term matches	getCardinality	getCardinality	get_cardinality
Length	Compute the minimum and maximum length of strings matched by the term	getLength	getLength	get_length
Equivalent	Check if the two terms accept exactly the same language	equivalent	equivalent	equivalent
Subset	Check if the first term's language is a subset of the second term's language	subset	subset	subset
Deterministic	Check if the term's automaton is deterministic	isDeterministic	isDeterministic	is_deterministic
Pattern	Return a regular expression pattern that represents the term	getPattern	getPattern	get_pattern
Graphviz DOT	Build a Graphviz DOT representation of the term's automaton	getDot	getDot	get_dot

See Analyzing a Term, Equivalence and Subset and Term's Format.

Generate

Operation	Description	Java	JavaScript	Python
Strings	Generate up to limit distinct strings matched by the term, skipping the first offset	generateStrings	generateStrings	generate_strings

See Generate Strings and String Generation Ordering.

Account

Operation	Description	Java	JavaScript	Python
Limits	Return the plan limits applying to the account	getAccountLimits	getAccountLimits	get_account_limits

See Plans and Pricing.

Local, without an API call

matches checks whether a single string belongs to a Term's language. It runs locally and needs the Term's pattern to be resolved first. See Matching strings locally.

Calling the API directly

If you are not using a client library, the API Reference documents each operation as an endpoint, with its request body, response shape and errors.