Results for “Bulk changes & set operations”
Small, practical examples. Search by task or narrow things down below.
Check whether a variable exists under nounset
Bash Scripts: The plus expansion distinguishes an unset variable without reading its missing value.
Bash Scripts✓ Tested
Clamp a numeric setting to a valid range
Bash Scripts: Use arithmetic comparisons before applying a user-supplied bounded setting.
Bash Scripts✓ Tested
Combine collections as a distinct set
C#: Union retains each value once across both inputs.
C#✓ Tested
Commit multiple related changes together
SQL: The first transaction prepares the fixtures. The second commits both updates as one unit.
SQL✓ Tested
Commit multiple related changes together
SQL Server: The first transaction prepares the fixtures. The second commits both updates as one unit.
SQL Server✓ Tested
Commit multiple related changes together
Postgres: The first transaction prepares the fixtures. The second commits both updates as one unit.
Postgres✓ Tested
Commit multiple related changes together
SQLite: The first transaction prepares the fixtures. The second commits both updates as one unit.
SQLite✓ Tested
Convert an aware datetime to another offset
Python: Use astimezone for conversion; replacing tzinfo alone does not convert an instant.
Python✓ Tested
Convert Unix seconds to an offset-aware timestamp
C#: DateTimeOffset preserves the UTC offset explicitly.
C#✓ Tested
Discard incidental output from a setup command
PowerShell: Out-Null prevents setup objects from becoming part of a function or script’s useful result.
PowerShell✓ Tested
Display an instant at a fixed offset
Display an instant at a fixed offset using a complete Go program with explicit sample inputs.
Go✓ Tested
Distinguish unset variables from empty strings
Bash Scripts: Omitting the colon tests only whether a variable is unset; including it also treats an empty value as missing.
Bash Scripts✓ Tested