Results for “standard”
Small, practical examples. Search by task or narrow things down below.
Build text efficiently in a loop
Java: Append to StringBuilder when constructing a string incrementally.
Java✓ Tested
Build text incrementally
Build text incrementally using a complete Go program with explicit sample inputs.
Go✓ Tested
Build text incrementally with StringBuilder
C#: Append fragments instead of repeatedly concatenating intermediate strings in a loop.
C#✓ Tested
Cache repeated pure function calls
Python: Use lru_cache to avoid recomputing results for identical hashable arguments.
Python✓ Tested
Calculate a product with Aggregate
C#: Supply a seed to define the result for an empty sequence.
C#✓ Tested
Calculate a SHA-256 checksum
Calculate a file checksum so you can compare it with a hash from a trusted source and detect changed contents.
checksum✓ Tested
Calculate a SHA-256 content digest
Java: Hash UTF-8 bytes and format the result as lowercase hexadecimal.
Java✓ Tested
Calculate a SHA-256 text digest
Calculate a SHA-256 text digest using a complete Go program with explicit sample inputs.
Go✓ Tested
Calculate a simple total
Python: Multiply a unit price by a quantity, then add a delivery fee.
Python✓ Tested
Calculate a simple total
C#: Multiply a unit price by a quantity, then add a delivery fee.
C#✓ Tested
Calculate a simple total
Java: Multiply a unit price by a quantity, then add a delivery fee.
Java✓ Tested
Calculate a subtotal
Calculate a subtotal using a complete Go program with explicit sample inputs.
Go✓ Tested