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Mention iteration depth for some Iterable methods
Closes #7797 Most of the other suggestions have already been added, add an explicit mention of shorcutting for `contains`, `firstWhere`, and `single`, R=lrn@google.com Change-Id: I53c254839f198a368fcb8734c3f7983b9b3ccad4 CoreLibraryReviewExempt: Doc changes only. Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/310767 Reviewed-by: Lasse Nielsen <lrn@google.com> Commit-Queue: Nate Bosch <nbosch@google.com>
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@ -306,6 +306,7 @@ abstract mixin class Iterable<E> {
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/// This operation will check each element in order for being equal to
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/// [element], unless it has a more efficient way to find an element
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/// equal to [element].
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/// Stops iterating on the first equal element.
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///
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/// The equality used to determine whether [element] is equal to an element of
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/// the iterable defaults to the [Object.==] of the element.
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@ -665,6 +666,7 @@ abstract mixin class Iterable<E> {
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/// Checks that this iterable has only one element, and returns that element.
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///
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/// Throws a [StateError] if `this` is empty or has more than one element.
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/// This operation will not iterate past the second element.
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E get single {
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Iterator<E> it = iterator;
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if (!it.moveNext()) throw IterableElementError.noElement();
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@ -689,6 +691,7 @@ abstract mixin class Iterable<E> {
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/// If no element satisfies [test], the result of invoking the [orElse]
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/// function is returned.
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/// If [orElse] is omitted, it defaults to throwing a [StateError].
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/// Stops iterating on the first matching element.
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E firstWhere(bool test(E element), {E orElse()?}) {
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for (E element in this) {
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if (test(element)) return element;
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