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C#Text validation & encoding

Pad a numeric label to a fixed width

C#: Use a numeric format specifier to add leading zeroes.

C#✓ Tested
SQL ServerSelect & page

Page an ordered result

Skip rows and fetch a bounded page.

OFFSET✓ Tested
SQLRelationships & missing data

Pair employees with their managers

SQL: Alias a table twice to represent two different roles in one relationship.

SQL✓ Tested
SQL ServerRelationships & missing data

Pair employees with their managers

SQL Server: Alias a table twice to represent two different roles in one relationship.

SQL Server✓ Tested
PostgresRelationships & missing data

Pair employees with their managers

Postgres: Alias a table twice to represent two different roles in one relationship.

Postgres✓ Tested
SQLiteRelationships & missing data

Pair employees with their managers

SQLite: Alias a table twice to represent two different roles in one relationship.

SQLite✓ Tested
JavaDates & time zones

Parse a date with an explicit input pattern

Java: Use DateTimeFormatter for a non-ISO date representation.

Java✓ Tested
C#Asynchronous work & URI handling

Parse a GUID without an exception

C#: TryParse reports malformed values with a boolean return.

C#✓ Tested
JavaNumbers & dates

Parse an integer safely

Handle invalid Java integer input with NumberFormatException.

Java✓ Tested
PythonDates & time zones

Parse an ISO calendar date

Python: Use date.fromisoformat and inspect the calendar components.

Python✓ Tested
PowerShellText & data

Parse JSON into an object

Access a named field in a JSON document.

JSON✓ Tested
CStructures & function interfaces

Pass a function as a callback

C: A typed function pointer permits behavior to be supplied to another function.

C✓ Tested