sdk/lib/core/sequences.dart - Issue 11412086: Make 'where' lazy.

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

Issue 11412086: Make 'where' lazy. (Closed) Base URL: https://dart.googlecode.com/svn/experimental/lib_v2/dart

Patch Set: FilteredIterable/Iterator -> WhereIterable/Iterator. 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 677f93e1fabcabc9c5b47b7a2d05cedef5c2a0aa..a5a899127c3222abeb63808d3be6dd9f9a2b31f3 100644

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

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

@@ -56,14 +56,7 @@ abstract class SequenceCollection<E> implements Collection<E>, Sequence<E> {

return value;

}

- Collection<E> where(bool f(E element)) {

- List<E> result = <E>[];

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

- E element = this[i];

- if (f(element)) result.add(element);

- }

- return result;

- }

+ Iterable<E> where(bool f(E element)) => new WhereIterable<E>(this, f);

bool every(bool f(E element)) {

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