object ListBuffer extends StrictOptimizedSeqFactory[ListBuffer]
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- @SerialVersionUID()
- Source
- ListBuffer.scala
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- ListBuffer
- StrictOptimizedSeqFactory
- SeqFactory
- IterableFactory
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Value Members
- def apply[A](elems: A*): ListBuffer[A]
Creates a list buffer with the specified elements.
Creates a list buffer with the specified elements.
- A
the type of the list buffer's elements
- elems
the elements of the created list buffer
- returns
a new list buffer with elements
elems
- Definition Classes
- IterableFactory
- def concat[A](xss: collection.Iterable[A]*): ListBuffer[A]
Concatenates all argument collections into a single list buffer.
Concatenates all argument collections into a single list buffer.
- xss
the collections that are to be concatenated.
- returns
the concatenation of all the collections.
- Definition Classes
- StrictOptimizedSeqFactory → IterableFactory
- def empty[A]: ListBuffer[A]
An empty list buffer
An empty list buffer
- A
the type of the list buffer's elements
- Definition Classes
- ListBuffer → IterableFactory
- def fill[A](n: Int)(elem: => A): ListBuffer[A]
Produces a list buffer containing the results of some element computation a number of times.
Produces a list buffer containing the results of some element computation a number of times.
- n
the number of elements contained in the list buffer.
- elem
the element computation
- returns
A list buffer that contains the results of
nevaluations ofelem.
- Definition Classes
- StrictOptimizedSeqFactory → IterableFactory
- def fill[A](n1: Int, n2: Int, n3: Int, n4: Int, n5: Int)(elem: => A): ListBuffer[ListBuffer[ListBuffer[ListBuffer[ListBuffer[A]]]]]
Produces a five-dimensional list buffer containing the results of some element computation a number of times.
Produces a five-dimensional list buffer containing the results of some element computation a number of times.
- n1
the number of elements in the 1st dimension
- n2
the number of elements in the 2nd dimension
- n3
the number of elements in the 3rd dimension
- n4
the number of elements in the 4th dimension
- n5
the number of elements in the 5th dimension
- elem
the element computation
- returns
A list buffer that contains the results of
n1 x n2 x n3 x n4 x n5evaluations ofelem.
- Definition Classes
- IterableFactory
- def fill[A](n1: Int, n2: Int, n3: Int, n4: Int)(elem: => A): ListBuffer[ListBuffer[ListBuffer[ListBuffer[A]]]]
Produces a four-dimensional list buffer containing the results of some element computation a number of times.
Produces a four-dimensional list buffer containing the results of some element computation a number of times.
- n1
the number of elements in the 1st dimension
- n2
the number of elements in the 2nd dimension
- n3
the number of elements in the 3rd dimension
- n4
the number of elements in the 4th dimension
- elem
the element computation
- returns
A list buffer that contains the results of
n1 x n2 x n3 x n4evaluations ofelem.
- Definition Classes
- IterableFactory
- def fill[A](n1: Int, n2: Int, n3: Int)(elem: => A): ListBuffer[ListBuffer[ListBuffer[A]]]
Produces a three-dimensional list buffer containing the results of some element computation a number of times.
Produces a three-dimensional list buffer containing the results of some element computation a number of times.
- n1
the number of elements in the 1st dimension
- n2
the number of elements in the 2nd dimension
- n3
the number of elements in the 3rd dimension
- elem
the element computation
- returns
A list buffer that contains the results of
n1 x n2 x n3evaluations ofelem.
- Definition Classes
- IterableFactory
- def fill[A](n1: Int, n2: Int)(elem: => A): ListBuffer[ListBuffer[A]]
Produces a two-dimensional list buffer containing the results of some element computation a number of times.
Produces a two-dimensional list buffer containing the results of some element computation a number of times.
- n1
the number of elements in the 1st dimension
- n2
the number of elements in the 2nd dimension
- elem
the element computation
- returns
A list buffer that contains the results of
n1 x n2evaluations ofelem.
- Definition Classes
- IterableFactory
- def from[A](coll: IterableOnce[A]): ListBuffer[A]
Creates a target list buffer from an existing source collection
Creates a target list buffer from an existing source collection
- A
the type of the collection’s elements
- returns
a new list buffer with the elements of
source
- Definition Classes
- ListBuffer → IterableFactory
- implicit def iterableFactory[A]: Factory[A, ListBuffer[A]]
- Definition Classes
- IterableFactory
- def iterate[A](start: A, len: Int)(f: (A) => A): ListBuffer[A]
Produces a list buffer containing repeated applications of a function to a start value.
Produces a list buffer containing repeated applications of a function to a start value.
- start
the start value of the list buffer
- len
the number of elements contained in the list buffer
- f
the function that's repeatedly applied
- returns
a list buffer with
lenvalues in the sequencestart, f(start), f(f(start)), ...
- Definition Classes
- IterableFactory
- def newBuilder[A]: Builder[A, ListBuffer[A]]
- A
the type of the list buffer’s elements
- returns
A builder for
ListBufferobjects.
- Definition Classes
- ListBuffer → IterableFactory
- def range[A](start: A, end: A, step: A)(implicit arg0: Integral[A]): ListBuffer[A]
Produces a list buffer containing equally spaced values in some integer interval.
Produces a list buffer containing equally spaced values in some integer interval.
- start
the start value of the list buffer
- end
the end value of the list buffer (the first value NOT contained)
- step
the difference between successive elements of the list buffer (must be positive or negative)
- returns
a list buffer with values
start, start + step, ...up to, but excludingend
- Definition Classes
- IterableFactory
- def range[A](start: A, end: A)(implicit arg0: Integral[A]): ListBuffer[A]
Produces a list buffer containing a sequence of increasing of integers.
Produces a list buffer containing a sequence of increasing of integers.
- start
the first element of the list buffer
- end
the end value of the list buffer (the first value NOT contained)
- returns
a list buffer with values
start, start + 1, ..., end - 1
- Definition Classes
- IterableFactory
- def tabulate[A](n: Int)(f: (Int) => A): ListBuffer[A]
Produces a list buffer containing values of a given function over a range of integer values starting from 0.
Produces a list buffer containing values of a given function over a range of integer values starting from 0.
- n
The number of elements in the list buffer
- f
The function computing element values
- returns
A list buffer consisting of elements
f(0), ..., f(n -1)
- Definition Classes
- StrictOptimizedSeqFactory → IterableFactory
- def tabulate[A](n1: Int, n2: Int, n3: Int, n4: Int, n5: Int)(f: (Int, Int, Int, Int, Int) => A): ListBuffer[ListBuffer[ListBuffer[ListBuffer[ListBuffer[A]]]]]
Produces a five-dimensional list buffer containing values of a given function over ranges of integer values starting from 0.
Produces a five-dimensional list buffer containing values of a given function over ranges of integer values starting from 0.
- n1
the number of elements in the 1st dimension
- n2
the number of elements in the 2nd dimension
- n3
the number of elements in the 3rd dimension
- n4
the number of elements in the 4th dimension
- n5
the number of elements in the 5th dimension
- f
The function computing element values
- returns
A list buffer consisting of elements
f(i1, i2, i3, i4, i5)for0 <= i1 < n1,0 <= i2 < n2,0 <= i3 < n3,0 <= i4 < n4, and0 <= i5 < n5.
- Definition Classes
- IterableFactory
- def tabulate[A](n1: Int, n2: Int, n3: Int, n4: Int)(f: (Int, Int, Int, Int) => A): ListBuffer[ListBuffer[ListBuffer[ListBuffer[A]]]]
Produces a four-dimensional list buffer containing values of a given function over ranges of integer values starting from 0.
Produces a four-dimensional list buffer containing values of a given function over ranges of integer values starting from 0.
- n1
the number of elements in the 1st dimension
- n2
the number of elements in the 2nd dimension
- n3
the number of elements in the 3rd dimension
- n4
the number of elements in the 4th dimension
- f
The function computing element values
- returns
A list buffer consisting of elements
f(i1, i2, i3, i4)for0 <= i1 < n1,0 <= i2 < n2,0 <= i3 < n3, and0 <= i4 < n4.
- Definition Classes
- IterableFactory
- def tabulate[A](n1: Int, n2: Int, n3: Int)(f: (Int, Int, Int) => A): ListBuffer[ListBuffer[ListBuffer[A]]]
Produces a three-dimensional list buffer containing values of a given function over ranges of integer values starting from 0.
Produces a three-dimensional list buffer containing values of a given function over ranges of integer values starting from 0.
- n1
the number of elements in the 1st dimension
- n2
the number of elements in the 2nd dimension
- n3
the number of elements in the 3rd dimension
- f
The function computing element values
- returns
A list buffer consisting of elements
f(i1, i2, i3)for0 <= i1 < n1,0 <= i2 < n2, and0 <= i3 < n3.
- Definition Classes
- IterableFactory
- def tabulate[A](n1: Int, n2: Int)(f: (Int, Int) => A): ListBuffer[ListBuffer[A]]
Produces a two-dimensional list buffer containing values of a given function over ranges of integer values starting from 0.
Produces a two-dimensional list buffer containing values of a given function over ranges of integer values starting from 0.
- n1
the number of elements in the 1st dimension
- n2
the number of elements in the 2nd dimension
- f
The function computing element values
- returns
A list buffer consisting of elements
f(i1, i2)for0 <= i1 < n1and0 <= i2 < n2.
- Definition Classes
- IterableFactory
- final def unapplySeq[A](x: ListBuffer[A]): UnapplySeqWrapper[A]
- Definition Classes
- SeqFactory
- def unfold[A, S](init: S)(f: (S) => Option[(A, S)]): ListBuffer[A]
Produces a list buffer that uses a function
fto produce elements of typeAand update an internal state of typeS.Produces a list buffer that uses a function
fto produce elements of typeAand update an internal state of typeS.- A
Type of the elements
- S
Type of the internal state
- init
State initial value
- f
Computes the next element (or returns
Noneto signal the end of the collection)- returns
a list buffer that produces elements using
funtilfreturnsNone
- Definition Classes
- IterableFactory
This is the documentation for the Scala standard library.
Package structure
The scala package contains core types like
Int,Float,ArrayorOptionwhich are accessible in all Scala compilation units without explicit qualification or imports.Notable packages include:
scala.collectionand its sub-packages contain Scala's collections frameworkscala.collection.immutable- Immutable, sequential data-structures such asVector,List,Range,HashMaporHashSetscala.collection.mutable- Mutable, sequential data-structures such asArrayBuffer,StringBuilder,HashMaporHashSetscala.collection.concurrent- Mutable, concurrent data-structures such asTrieMapscala.concurrent- Primitives for concurrent programming such asFuturesandPromisesscala.io- Input and output operationsscala.math- Basic math functions and additional numeric types likeBigIntandBigDecimalscala.sys- Interaction with other processes and the operating systemscala.util.matching- Regular expressionsOther packages exist. See the complete list on the right.
Additional parts of the standard library are shipped as separate libraries. These include:
scala.reflect- Scala's reflection API (scala-reflect.jar)scala.xml- XML parsing, manipulation, and serialization (scala-xml.jar)scala.collection.parallel- Parallel collections (scala-parallel-collections.jar)scala.util.parsing- Parser combinators (scala-parser-combinators.jar)scala.swing- A convenient wrapper around Java's GUI framework called Swing (scala-swing.jar)Automatic imports
Identifiers in the scala package and the
scala.Predefobject are always in scope by default.Some of these identifiers are type aliases provided as shortcuts to commonly used classes. For example,
Listis an alias forscala.collection.immutable.List.Other aliases refer to classes provided by the underlying platform. For example, on the JVM,
Stringis an alias forjava.lang.String.