Class GrowableBuilder.GrowableBuilder

class GrowableBuilder[Elem, To <: Growable[Elem]](val elems: To) extends Builder[Elem, To]

The canonical builder for collections that are growable, i.e. that support an efficient += method which adds an element to the collection.

GrowableBuilders can produce only a single instance of the collection they are growing.

Concrete methods

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override def addAll(xs: IterableOnce[Elem]): GrowableBuilder.this.type

Adds all elements produced by an IterableOnce to this growing builder.

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def addOne(elem: Elem): GrowableBuilder.this.type

Adds a single element to this growing builder.

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def clear(): Unit

Clears the contents of this builder. After execution of this method the builder will contain no elements.

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override def knownSize: Int

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def result(): To

Result collection consisting of all elements appended so far.

Inherited methods

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final def ++=(xs: IterableOnce[Elem]): Growable.this.type

Alias for addAll

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final def +=(elem: Elem): Growable.this.type

Alias for addOne

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def mapResult[NewTo](f: To => NewTo): Builder[A, NewTo]

A builder resulting from this builder my mapping the result using f.

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final def sizeHint(coll: IterableOnce[_], delta: Int): Unit

Gives a hint that one expects the result of this builder to have the same size as the given collection, plus some delta. This will provide a hint only if the collection has a known size Some builder classes will optimize their representation based on the hint. However, builder implementations are still required to work correctly even if the hint is wrong, i.e. a different number of elements is added.

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def sizeHint(size: Int): Unit

Gives a hint how many elements are expected to be added when the next result is called. Some builder classes will optimize their representation based on the hint. However, builder implementations are still required to work correctly even if the hint is wrong, i.e. a different number of elements is added.

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final def sizeHintBounded(size: Int, boundingColl: Iterable[_]): Unit

Gives a hint how many elements are expected to be added when the next result is called, together with an upper bound given by the size of some other collection. Some builder classes will optimize their representation based on the hint. However, builder implementations are still required to work correctly even if the hint is wrong, i.e. a different number of elements is added.