Results for “GROUP BY”
Small, practical examples. Search by task or narrow things down below.
Calculate a simple total
C: Multiply a unit price by a quantity, then add a delivery fee.
C✓ Tested
Calculate an average without integer division truncation
C: Accumulate into double and divide by the nonzero number of readings.
C✓ Tested
Check a change for whitespace problems
Git: Check a change for whitespace problems inside the disposable repository created by the input setup.
Git✓ Tested
Check an array allocation size before multiplying
C: Compare the requested element count against SIZE_MAX divided by element size.
C✓ Tested
Check memory usage
Show memory and swap totals in human-readable units. The available column estimates memory usable by new applications.
memory✓ Tested
Check the Gregorian leap-year rule
Java: Use Year.isLeap rather than checking divisibility by four alone.
Java✓ Tested
Check the integrity of a gzip stream
Linux Commands: Use gzip -t to verify a compressed file without extracting it.
Linux Commands✓ Tested
Check the size of a folder
Show a single total for the disk space used by a folder and its contents.
disk usage✓ Tested
Check whether a file is already sorted
Linux Commands: Use sort -C for a quiet status check that does not rewrite the file.
Linux Commands✓ Tested
Check whether a value is a safe integer
JavaScript: Number.isSafeInteger also checks the exact-integer range supported by Number.
JavaScript✓ Tested
Check whether a value is a safe integer
TypeScript: Number.isSafeInteger also checks the exact-integer range supported by Number.
TypeScript✓ Tested
Check whether two practice files match
Linux Commands: Check whether two practice files match using GNU/Linux commands in an empty practice directory.
Linux Commands✓ Tested