Add string utility function: isValidSwissSocialSecurityNumber

[dom-baur]

Add string utility function isValidSwissSocialSecurityNumber for issue #77

[pkg-pr-new]

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npm i https://pkg.pr.new/neolution-ch/javascript-utils/@neolution-ch/javascript-utils@78

commit: 933ef62

[dom-baur]

This part of the code is probably not the best solution. Is there a better way to solve this?

// code is never undefined!
return (code! - 55).toString();

[Copilot]

Pull Request Overview

This PR adds a new string utility function isValidSwissSocialSecurityNumber that validates Swiss social security numbers (AHV numbers) with checksum verification according to the official Swiss format specification.

• Adds validation function for Swiss social security numbers with checksum calculation
• Supports both dotted format (756.XXXX.XXXX.XX) and compact format (756XXXXXXXXXX)
• Includes comprehensive test coverage for various valid and invalid input scenarios

Reviewed Changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 3 comments.

File	Description
src/lib/string.ts	Implements the Swiss social security number validation function with checksum verification
src/lib/string.spec.ts	Adds test cases covering valid/invalid formats and edge cases
CHANGELOG.md	Documents the new utility function in the unreleased section

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[github-actions]

Package	Line Rate	Branch Rate	Complexity	Health
main	100%	100%	0	✔
Summary	100% (174 / 174)	100% (91 / 91)	0	✔