Results for “Text validation & parsing”
Small, practical examples. Search by task or narrow things down below.
Transform each regex match with a callback
TypeScript: A replacement callback computes the replacement separately for each match.
TypeScript✓ Tested
Translate ASCII lowercase letters to uppercase
Linux Commands: Use tr under a fixed locale for predictable ASCII character ranges.
Linux Commands✓ Tested
Treat an empty trimmed value as missing
SQL: NULLIF converts an empty string to NULL before a fallback is applied.
SQL✓ Tested
Treat an empty trimmed value as missing
SQL Server: NULLIF converts an empty string to NULL before a fallback is applied.
SQL Server✓ Tested
Treat an empty trimmed value as missing
Postgres: NULLIF converts an empty string to NULL before a fallback is applied.
Postgres✓ Tested
Treat an empty trimmed value as missing
SQLite: NULLIF converts an empty string to NULL before a fallback is applied.
SQLite✓ Tested
Trim and discard blank lines
JavaScript: Split a text block, trim each line, and keep nonempty values.
JavaScript✓ Tested
Trim and discard blank lines
TypeScript: Split a text block, trim each line, and keep nonempty values.
TypeScript✓ Tested
Trim surrounding whitespace
Trim surrounding whitespace using a complete Go program with explicit sample inputs.
Go✓ Tested
Trim surrounding whitespace from an Arduino String
Arduino / C: String.trim modifies the object in place.
Arduino / C✓ Tested
Trim whitespace around a string
PowerShell: The Trim method removes surrounding whitespace while preserving the middle of the string.
PowerShell✓ Tested
Use a literal value in a regular expression
PowerShell: Regex.Escape prevents a literal dot or other metacharacter from changing the match.
PowerShell✓ Tested