Results for “values”
Small, practical examples. Search by task or narrow things down below.
Test missing values with IS NULL
Find rows where an optional value is absent.
IS NULL✓ Tested
Test whether any or all values match
C#: Any and All short-circuit instead of materializing filtered collections.
C#✓ Tested
Transform array values
Use map to create a JavaScript array of squared values.
JavaScript✓ Tested
Turn known group values into columns
SQL: Conditional aggregation gives a portable pivot when the category set is known.
SQL✓ Tested
Turn known group values into columns
SQL Server: Conditional aggregation gives a portable pivot when the category set is known.
SQL Server✓ Tested
Turn known group values into columns
Postgres: Conditional aggregation gives a portable pivot when the category set is known.
Postgres✓ Tested
Turn known group values into columns
SQLite: Conditional aggregation gives a portable pivot when the category set is known.
SQLite✓ Tested
Understand default zero values
Understand default zero values using a complete Go program with explicit sample inputs.
Go✓ Tested
Wait for several deferred values
jQuery: when resolves only after every supplied deferred has resolved.
jQuery✓ Tested
Yield values on demand
Python: Use a generator to produce a sequence without storing all intermediate values.
Python✓ Tested
Add context to a parsing failure
Add context to a parsing failure in a complete Rust program using the standard library.
Rust✓ Tested
Apply an operation to a variant’s active value
C++: A generic visitor lets the compiler check behavior for every possible alternative.
C++✓ Tested