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Results for “Iterators & transformations”

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JavaStream transformations

Check any and all stream elements

Java: Use short-circuiting match operations for predicates over a Java collection.

Java✓ Tested
C#LINQ transformations

Create a reusable one-to-many lookup

C#: ToLookup groups values by key and returns an empty sequence for an unknown key.

C#✓ Tested
CArray transformations

Filter an array in place with a write index

C: Only retained values advance the write position.

C✓ Tested
C#LINQ transformations

Find a matching item with a fallback

C#: Use the FirstOrDefault overload with an explicit default value.

C#✓ Tested
JavaStream transformations

Find the first matching stream value

Java: Use findFirst and an explicit default for an empty result.

Java✓ Tested
CArray transformations

Find the smallest value in a nonempty array

C: Initialize from the first element instead of assuming a numeric sentinel.

C✓ Tested
JavaStream transformations

Flatten nested collections

Java: Use flatMap to concatenate nested Java lists into one stream.

Java✓ Tested
C#LINQ transformations

Flatten nested collections with SelectMany

C#: Concatenate the items from several sequences into one sequence.

C#✓ Tested
JavaStream transformations

Group strings by their length

Java: Choose a TreeMap supplier when group keys must have deterministic order.

Java✓ Tested
JavaStream transformations

Index records by a unique key

Java: Use toMap with an explicit merge rule so duplicate keys have defined behavior.

Java✓ Tested
CArray transformations

Insert into an array with spare capacity

C: Move the trailing elements before inserting and keep the logical length separate from capacity.

C✓ Tested
JavaStream transformations

Join transformed stream values

Java: Use Collectors.joining after converting elements to strings.

Java✓ Tested