Scala Library
|
|
final
class
ListBuffer[A]
extends
Buffer[A]Method Summary | |
def
|
+:
(x : A) : Buffer[A]
Prepends a single element to this buffer. It takes constant
time.
|
override def
|
+=
(x : A) : Unit
Appends a single element to this buffer. It takes constant
time.
|
def
|
-
(x : A) : Buffer[A]
Removes a single element from the buffer and return
the identity of the buffer. Same as
this -= x; this . It
takes linear time (except removing the first element, which is done
in constant time). |
override def
|
-=
(x : A) : Unit
Remove a single element from this buffer. It takes linear time
(except removing the first element, which is done in constant time).
|
def
|
apply
(n : Int) : A
Returns the n-th element of this list. This method
yields an error if the element does not exist. Takes time
linear in the buffer size.
|
def
|
clear
: Unit
Clears the buffer contents.
|
override def
|
clone
: Buffer[A]
Returns a clone of this buffer.
|
override def
|
elements : Iterator[A] |
override def
|
equals
(obj : Any) : Boolean
Checks if two buffers are structurally identical.
|
def
|
insertAll
(n : Int, iter : Iterable[A]) : Unit
Inserts new elements at the index
n . Opposed to method
update , this method will not replace an element with a new
one. Instead, it will insert a new element at index n . |
override def
|
isEmpty
: Boolean
Returns true if length == 0
|
def
|
length
: Int
Returns the length of this buffer. It takes linear time.
|
def
|
prependToList
(xs : List[A]) : List[A]
Prepends the elements of this buffer to a given list
|
override def
|
readOnly
: List[A]
expose the underlying list but do not mark it as exported
|
def
|
remove
(n : Int) : A
Removes the element on a given index position. Takes time linear in
the buffer size (except for the first element, which is removed in constant
time).
|
protected override def
|
stringPrefix
: java.lang.String
Defines the prefix of the string representation.
|
override def
|
toList
: List[A]
Converts this buffer to a list. Takes constant time. The buffer is
copied lazily, the first time it is mutated.
|
def
|
update
(n : Int, x : A) : Unit
Replaces element at index
n with the new element
newelem . Takes time linear in the buffer size. (except the first
element, which is updated in constant time). |
Methods inherited from Buffer | |
+, ++=, ++=, ++=, ++, ++, ++, ++:, append, appendAll, prepend, prependAll, insert, trimStart, trimEnd, <<, hashCode |
Methods inherited from Seq | |
lengthCompare, size, concat, last, lastOption, first, firstOption, headOption, isDefinedAt, lastIndexOf, findIndexOf, indexOf, map, flatMap, filter, take, drop, slice, slice, takeWhile, dropWhile, reverse, contains, subseq, toArray, toSeq, projection, equalsWith, startsWith, startsWith, endsWith, indexOf, containsSlice |
Methods inherited from Collection | |
toString |
Methods inherited from Iterable | |
partition, foreach, forall, exists, find, foldLeft, foldRight, /:, :\, reduceLeft, reduceRight, copyToBuffer, sameElements, toStream, mkString, mkString, mkString, addString, addString, addString, copyToArray, hasDefiniteSize |
Methods inherited from PartialFunction | |
orElse, andThen |
Methods inherited from Function1 | |
compose |
Methods inherited from AnyRef | |
getClass, notify, notifyAll, wait, wait, wait, finalize, ==, !=, eq, ne, synchronized |
Methods inherited from Any | |
==, !=, isInstanceOf, asInstanceOf |
Method Details |
x -
the element to prepend.x -
the element to append.this -= x; this
. It
takes linear time (except removing the first element, which is done
in constant time).x -
the element to remove.x -
the element to remove.xs -
the list to which elements are prepended
def
clear : Unit
def
length : Int
override
def
isEmpty : Boolean
n -
the position of the element to be returned.n
with the new element
newelem
. Takes time linear in the buffer size. (except the first
element, which is updated in constant time).n -
the index of the element to replace.x -
the new element.n
is out of bounds.n
. Opposed to method
update
, this method will not replace an element with a new
one. Instead, it will insert a new element at index n
.n -
the index where a new element will be inserted.iter -
the iterable object providing all elements to insert.n
is out of bounds.n -
the index which refers to the element to delete.n
.n
n
is out of bounds.Returns an iterator over all elements of this list.
Note: the iterator can be affected by insertions, updates and
deletions that are performed afterwards on the buffer. To get
iterator an over the current buffer snapshot, use
toList.elements
.
ListBuffer
with the same elements.true
, iff both buffers contain the same sequence of elements.protected override
def
stringPrefix : java.lang.String
Scala Library
|
|