Regexp package
regexp is Go’s standard-library package for compiling and matching regular expressions.
Learn Go with Pocket-Sized Projects
regexp is Go's standard-library package for compiling and applying regular expressions.
- How it is used
- Validates generated identifiers in endpoint tests while keeping expected JSON responses deterministic.
- How deep it goes
- Explains compilation, quantifiers, character ranges, capture groups, and match extraction, without covering broader package options.
- Examples
- Uses JSON containing an ID, FindStringSubmatch, strings.Replace, assert.JSONEq, and an alphanumeric ID assertion.
- What you can do after
- Diagnose and test generated string values by compiling patterns, extracting captures, and normalizing nondeterministic output.
Read how Learn Go with Pocket-Sized Projects explains regexp package →
Go in Action, Second Edition
The regexp package is Go's standard-library package for compiling and matching regular expressions.
- How it is used
- Validates configuration fields, sanitizes input, and extracts structured text within a standard-library CLI workflow.
- How deep it goes
- Defines core regex syntax and demonstrates compiled matching for one field, while stopping short of a complete syntax catalog.
- Examples
- Uses metacharacter examples, configuration names, semantic-version strings, hostnames, and a compiled validation listing.
- What you can do after
- Apply compiled regular expressions to validate configuration values and recognize structured text patterns.
Read how Go in Action, Second Edition explains regexp package →
Related concepts
- regular expressionuses · A formal pattern notation that describes sets of strings and enables text to be matched, searched, extracted, or transformed.
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