GrowableBuilder
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.
Attributes
- Source
- GrowableBuilder.scala
- Graph
-
- Supertypes
Members list
Value members
Concrete methods
Adds all elements produced by an IterableOnce to this growing builder.
Adds all elements produced by an IterableOnce to this growing builder.
Value parameters
- elems
-
the IterableOnce producing the elements to add.
Attributes
- Returns
-
the growing builder itself.
- Definition Classes
- Source
- GrowableBuilder.scala
Adds a single element to this growing builder.
Adds a single element to this growing builder.
Value parameters
- elem
-
the element to add.
Attributes
- Returns
-
the growing builder itself
- Source
- GrowableBuilder.scala
Clears the contents of this builder.
Clears the contents of this builder. After execution of this method the builder will contain no elements.
Attributes
- Source
- GrowableBuilder.scala
The number of elements in the collection under construction, if it can be cheaply computed, -1 otherwise.
The number of elements in the collection under construction, if it can be cheaply computed, -1 otherwise.
Attributes
- Returns
-
The number of elements. The default implementation always returns -1.
- Definition Classes
- Source
- GrowableBuilder.scala
Result collection consisting of all elements appended so far.
Result collection consisting of all elements appended so far.
Attributes
- Source
- GrowableBuilder.scala
Inherited methods
Alias for addAll
Alias for addOne
A builder resulting from this builder by mapping the result using f.
A builder resulting from this builder by mapping the result using f.
Attributes
- Inherited from:
- Builder
- Source
- Builder.scala
Gives a hint that the result of this builder is expected to have the same size as the given collection, plus some delta.
Gives a hint that the result of this builder is expected to have the same size as the given collection, plus some delta.
This method provides a hint only if the collection has a known size, as specified by the following pseudocode:
if (coll.knownSize != -1)
if (coll.knownSize + delta <= 0) sizeHint(0)
else sizeHint(coll.knownSize + delta)
If the delta is negative and the result size is known to be negative, then the size hint is issued at zero.
Some builder classes will optimize their representation based on the hint. However, builder implementations are required to work correctly even if the hint is wrong, i.e., if a different number of elements is added.
Value parameters
- coll
-
the collection which serves as a hint for the result's size.
- delta
-
a correction to add to the
coll.sizeto produce the size hint (zero if omitted).
Attributes
- Inherited from:
- Builder
- Source
- Builder.scala
Gives a hint how many elements are expected to be added in total by the time result is called.
Gives a hint how many elements are expected to be added in total by the time result is called.
Some builder classes will optimize their representation based on the hint. However, builder implementations are required to work correctly even if the hint is wrong, e.g., a different number of elements is added, or the hint is out of range.
The default implementation simply ignores the hint.
Value parameters
- size
-
the hint how many elements will be added.
Attributes
- Inherited from:
- Builder
- Source
- Builder.scala
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.
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.
Value parameters
- boundingColl
-
the bounding collection. If it is an IndexedSeqLike, then sizes larger than collection's size are reduced.
- size
-
the hint how many elements will be added.
Attributes
- Inherited from:
- Builder
- Source
- Builder.scala
Deprecated and Inherited methods
Adds two or more elements to this growable collection.
Adds two or more elements to this growable collection.
Value parameters
- elem1
-
the first element to add.
- elem2
-
the second element to add.
- elems
-
the remaining elements to add.
Attributes
- Returns
-
the growable collection itself
- Deprecated
- true
- Inherited from:
- Growable
- Source
- Growable.scala