sdk/lib/core/sequences.dart - Issue 11414069: Make mappedBy lazy.

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Unified Diff: sdk/lib/core/sequences.dart

Issue 11414069: Make mappedBy lazy. (Closed) Base URL: https://dart.googlecode.com/svn/experimental/lib_v2/dart

Patch Set: Remove CollectionUtils.mappedBy in Swarm. Created 8 years, 1 month ago

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Index: sdk/lib/core/sequences.dart

diff --git a/sdk/lib/core/sequences.dart b/sdk/lib/core/sequences.dart

index 340ba0188b337968b47a327cbd2afbd44b6a76a0..a98fa8dd19838c3c570515a0822ed2bf348557b6 100644

--- a/sdk/lib/core/sequences.dart

+++ b/sdk/lib/core/sequences.dart

@@ -39,13 +39,7 @@ abstract class SequenceCollection<E> implements Collection<E>, Sequence<E> {

for (int i = 0; i < this.length; i++) f(this[i]);

}

- Collection mappedBy(f(E element)) {

- List result = new List();

- for (int i = 0; i < this.length; i++) {

- result.add(f(this[i]));

- }

- return result;

- }

+ Iterable mappedBy(f(E element)) => new MappedIterable(this, f);

bool contains(E value) {

for (int i = 0; i < sequence.length; i++) {