Results for “save”
Small, practical examples. Search by task or narrow things down below.
Validate a finite numeric value without coercion
TypeScript: Number.isFinite rejects numeric strings as well as NaN and infinity.
TypeScript✓ Tested
Validate a required argument
Java: Use requireNonNull with a useful message at an API boundary.
Java✓ Tested
Validate a simple C-style ASCII identifier
C: Check the first character separately from subsequent characters and reject empty input.
C✓ Tested
Validate a structured text identifier
HTML: The pattern attribute matches the entire nonempty input; required handles the empty case.
HTML✓ Tested
Validate a whole ASCII identifier
JavaScript: Use an anchored expression without the multiline flag and reject a trailing line break explicitly.
JavaScript✓ Tested
Validate a whole ASCII identifier
TypeScript: Use an anchored expression without the multiline flag and reject a trailing line break explicitly.
TypeScript✓ Tested
Validate an email input
Use browser constraint validation for a required HTML email field.
HTML✓ Tested
Validate an entire identifier
Python: Use fullmatch so a regex must consume the complete input.
Python✓ Tested
Validate an unknown value with a type guard
Check a field before treating unknown data as a typed object.
unknown✓ Tested
Validate the number of positional arguments
Bash Scripts: Use the argument count to enforce a simple command-line contract.
Bash Scripts✓ Tested
Validate the shape of an absolute URL
HTML: A URL input checks syntax, not whether a resource exists or is safe.
HTML✓ Tested
Validate UTF-8 bytes
Validate UTF-8 bytes using a complete Go program with explicit sample inputs.
Go✓ Tested