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scala.SeqProxy

trait SeqProxy

trait SeqProxy[+ A]

 extends Seq[A] with IterableProxy[A]

This class implements a proxy for sequences. It forwards all calls to a different sequence object.
author
- Matthias Zenger
- Martin Odersky
version
- 2.0, 31/12/2006


Source: SeqProxy.scala(22)

Direct Known Subclasses

StackProxy, QueueProxy, PriorityQueueProxy,

 Fields

elements override def elements
Creates a new iterator over all elements contained in this object [details]
return
- the new iterator
 Iterator[A] IterableProxy
first def first
Returns the first element of this list [details]
return
- the first element of the list.
throws
Predef.UnsupportedOperationException - if the list is empty.
 A Seq
firstOption def firstOption
Returns as an option the first element of this list or None if list is empty [details]
return
- the first element as an option.
 Option[A] Seq
hasDefiniteSize def hasDefiniteSize
returns true iff this collection has a bound size [details]
Many APIs in this trait will not work on collections of unbound sizes.
Boolean Iterable
headOption def headOption Option[A] Seq
isEmpty override def isEmpty
Returns true if length == 0
Boolean
last def last
Returns the last element of this list [details]
return
- the last element of the list.
throws
Predef.UnsupportedOperationException - if the list is empty.
 A Seq
lastOption def lastOption
Returns as an option the last element of this list or None if list is empty [details]
return
- the last element as an option.
 Option[A] Seq
length override def length
Returns the length of the sequence [details]
return
- the sequence length.
 Int
mkString def mkString
Converts a collection into a flat String by each element's toString method [details]
note
- Will not terminate for infinite-sized collections.
 String Iterable
projection override def projection
returns a projection that can be used to call non-strict filter, map, and flatMap methods that build projections of the collection
Projection[A] Seq
reverse override def reverse
A sequence consisting of all elements of this sequence in reverse order
Seq[A]
self abstract def self Seq[A]
size def size
should always be length
Int Seq
stringPrefix protected def stringPrefix
Defines the prefix of this object's toString representation
String Collection
toList override def toList
Returns a list containing all of the elements in this iterable object [details]
note
- Will not terminate for infinite-sized collections.
 List[A] IterableProxy
toSeq override def toSeq
Overridden for efficiency [details]
return
- the sequence itself
 Seq[A] Seq
toStream def toStream
Returns a stream containing all of the elements in this iterable object [details]
note
- consider using projection for lazy behavior.
 Stream[A] Iterable

 Methods

!= final def !=(arg0 : Any) Boolean Any
!= final def !=(arg0 : Object) Boolean AnyRef
++ override def ++[B >: A](that : Iterable[B])
Appends two iterable objects
Seq[B] Seq
/: override def /:[B](z : B)(op : (B, A) => B)
Similar to foldLeft but can be used as an operator with the order of list and zero arguments reversed [details]
That is, z /: xs is the same as xs foldLeft z
note
- Will not terminate for infinite-sized collections.
 B IterableProxy
:\ override def :\[B](z : B)(op : (A, B) => B)
An alias for foldRight [details]
That is, xs :\ z is the same as xs foldRight z
note
- Will not terminate for infinite-sized collections.
 B IterableProxy
== final def ==(arg0 : Object) Boolean AnyRef
== final def ==(arg0 : Any) Boolean Any
addString def addString(buf : StringBuilder, sep : String) StringBuilder Iterable
addString override def addString(buf : StringBuilder, start : String, sep : String, end : String)
Write all elements of this string into given string builder [details]
note
- Will not terminate for infinite-sized collections.
param
buf - ...
return
- ...
 StringBuilder IterableProxy
andThen override def andThen[C](k : (B) => C)
(f andThen g)(x) == g(f(x))
PartialFunction[A, C] PartialFunction
apply override def apply(i : Int) A
asInstanceOf final def asInstanceOf[T0] T0 Any
clone protected def clone Object AnyRef
compose def compose[A](g : (A) => T1)
(f compose g)(x) == f(g(x))
(A) => R Function1
concat override def concat[B >: A](that : Iterable[B])
Appends two iterable objects [details]
deprecated
- use ++ instead
return
- the new iterable object
 Seq[B]
contains override def contains(elem : Any)
Tests if the given value elem is a member of this sequence [details]
param
elem - element whose membership has to be tested.
return
- true iff there is an element of this sequence which is equal (w.r.t. ==) to elem.
Boolean
containsSlice def containsSlice[B](that : Seq[B])
Is that a slice in this?
Boolean Seq
copyToArray override def copyToArray[B >: A](xs : Array[B], start : Int)
Fills the given array xs with the elements of this sequence starting at position start [details]
note
- Will not terminate for infinite-sized collections.
param
xs - the array to fill.
start - starting index.
pre
- the array must be large enough to hold all elements.
 Unit
copyToBuffer override def copyToBuffer[B >: A](dest : Buffer[B])
Copy all elements to a given buffer [details]
note
- Will not terminate if not finite.
- Will not terminate for infinite-sized collections.
param
dest - The buffer to which elements are copied
 Unit IterableProxy
drop override def drop(n : Int)
Returns this sequence without its n first elements If this sequence has less than n elements, the empty sequence is returned [details]
(non-strict)
param
n - the number of elements to drop
return
- the new sequence
 Seq[A]
dropWhile override def dropWhile(p : (A) => Boolean)
Returns the longest suffix of this sequence whose first element does not satisfy the predicate p [details]
param
p - the test predicate.
return
- the longest suffix of the sequence whose first element does not satisfy the predicate p.
Seq[A]
endsWith def endsWith[B](that : Seq[B])
[details]
return
- true if this sequence end with that sequence
see
- String.endsWith
 Boolean Seq
eq final def eq(arg0 : Object) Boolean AnyRef
equals override def equals(that : Any) Boolean Proxy
equalsWith def equalsWith[B](that : Seq[B])(f : (A, B) => Boolean) Boolean Seq
exists override def exists(p : (A) => Boolean)
Apply a predicate p to all elements of this iterable object and return true, iff there is at least one element for which p yields true [details]
note
- May not terminate for infinite-sized collections.
param
p - the predicate
return
- true, iff the predicate yields true for at least one element.
 Boolean IterableProxy
filter override def filter(p : (A) => Boolean)
Returns all the elements of this sequence that satisfy the predicate p [details]
The order of the elements is preserved.
param
p - the predicate used to filter the list.
return
- the elements of this list satisfying p.
 Seq[A]
finalize protected def finalize Unit AnyRef
find override def find(p : (A) => Boolean)
Find and return the first element of the iterable object satisfying a predicate, if any [details]
note
- may not terminate for infinite-sized collections.
param
p - the predicate
return
- the first element in the iterable object satisfying p, or None if none exists.
Option[A] IterableProxy
findIndexOf override def findIndexOf(p : (A) => Boolean)
Returns index of the first element satisying a predicate, or -1 [details]
note
- may not terminate for infinite-sized collections.
param
p - the predicate
return
- the index of the first element satisfying p, or -1 if such an element does not exist
Int IterableProxy
flatMap override def flatMap[B](f : (A) => Iterable[B])
Applies the given function f to each element of this sequence, then concatenates the results [details]
param
f - the function to apply on each element.
return
- f(a0) ::: ... ::: f(an) if this sequence is a0, ..., an.
Seq[B]
foldLeft override def foldLeft[B](z : B)(op : (B, A) => B)
Combines the elements of this iterable object together using the binary function f, from left to right, and starting with the value z [details]
note
- Will not terminate for infinite-sized collections.
return
- f(... (f(f(z, a0), a1) ...), an) if the list is [a0, a1, ..., an].
B IterableProxy
foldRight override def foldRight[B](z : B)(op : (A, B) => B)
Combines the elements of this list together using the binary function f, from right to left, and starting with the value z [details]
note
- Will not terminate for infinite-sized collections.
return
- f(a0, f(a1, f(..., f(an, z)...))) if the list is [a0, a1, ..., an].
B IterableProxy
forall override def forall(p : (A) => Boolean)
Apply a predicate p to all elements of this iterable object and return true, iff the predicate yields true for all elements [details]
note
- May not terminate for infinite-sized collections.
param
p - the predicate
return
- true, iff the predicate yields true for all elements.
 Boolean IterableProxy
foreach override def foreach(f : (A) => Unit)
Apply a function f to all elements of this iterable object [details]
note
- Will not terminate for infinite-sized collections.
param
f - a function that is applied to every element.
 Unit IterableProxy
getClass final def getClass Class[Any] AnyRef
hashCode override def hashCode Int Proxy
indexOf def indexOf[B >: A](that : Seq[B])
[details]
return
- -1 if that not contained in this, otherwise the index where that is contained
see
- String.indexOf
 Int Seq
indexOf override def indexOf[B >: A](elem : B)
Returns the index of the first occurence of the specified object in this iterable object [details]
note
- may not terminate for infinite-sized collections.
param
elem - element to search for.
return
- the index in this sequence of the first occurence of the specified element, or -1 if the sequence does not contain this element.
Int IterableProxy
isDefinedAt override def isDefinedAt(x : Int)
Is this partial function defined for the index x? [details]
param
x - ..
return
- true, iff x is a legal sequence index.
 Boolean
isInstanceOf final def isInstanceOf[T0] Boolean Any
lastIndexOf override def lastIndexOf[B >: A](elem : B)
Returns the index of the last occurence of the specified element in this sequence, or -1 if the sequence does not contain this element [details]
param
elem - element to search for.
return
- the index in this sequence of the last occurence of the specified element, or -1 if the sequence does not contain this element.
Int
lengthCompare def lengthCompare(l : Int)
Returns length - l [details]
This method is used by matching streams against right-ignoring (...,_) patterns. Lazy sequences should override this method if length forces evaluation of the stream.
Int Seq
map override def map[B](f : (A) => B)
Returns the sequence resulting from applying the given function f to each element of this sequence [details]
param
f - function to apply to each element.
return
- f(a0), ..., f(an) if this sequence is a0, ..., an.
Seq[B]
mkString override def mkString(start : String, sep : String, end : String)
Returns a string representation of this iterable object [details]
The resulting string begins with the string start and is finished by the string end. Inside, the string representations of elements (w.r.t. the method toString()) are separated by the string sep.
ex
- List(1, 2, 3).mkString("(", "; ", ")") = "(1; 2; 3)"
note
- Will not terminate for infinite-sized collections.
param
sep - separator string.
start - starting string.
end - ending string.
return
- a string representation of this iterable object.
 String IterableProxy
mkString def mkString(sep : String)
Returns a string representation of this iterable object [details]
The string representations of elements (w.r.t. the method toString()) are separated by the string sep.
note
- Will not terminate for infinite-sized collections.
param
sep - separator string.
return
- a string representation of this iterable object.
 String Iterable
ne final def ne(arg0 : Object) Boolean AnyRef
notify final def notify Unit AnyRef
notifyAll final def notifyAll Unit AnyRef
orElse def orElse[A1 <: A, B1 >: B](that : PartialFunction[A1, B1]) PartialFunction[A1, B1] PartialFunction
partition def partition(p : (A) => Boolean)
Partitions this iterable in two iterables according to a predicate [details]
param
p - the predicate on which to partition
return
- a pair of iterables: the iterable that satisfy the predicate p and the iterable that do not. The relative order of the elements in the resulting iterables is the same as in the original iterable.
(Iterable[A], Iterable[A]) Iterable
reduceLeft override def reduceLeft[B >: A](op : (B, A) => B)
Combines the elements of this iterable object together using the binary operator op, from left to right [details]
note
- Will not terminate for infinite-sized collections.
param
op - The operator to apply
return
- op(... op(a0,a1), ..., an) if the iterable object has elements a0, a1, ..., an.
throws
Predef.UnsupportedOperationException - if the iterable object is empty.
 B IterableProxy
reduceRight override def reduceRight[B >: A](op : (A, B) => B)
Combines the elements of this iterable object together using the binary operator op, from right to left [details]
note
- Will not terminate for infinite-sized collections.
param
op - The operator to apply
return
- a0 op (... op (an-1 op an)...) if the iterable object has elements a0, a1, ..., an.
throws
Predef.UnsupportedOperationException - if the iterator is empty.
 B IterableProxy
sameElements override def sameElements[B >: A](that : Iterable[B])
Checks if the other iterable object contains the same elements [details]
note
- will not terminate for infinite-sized collections.
param
that - the other iterable object
return
- true, iff both iterable objects contain the same elements.
 Boolean IterableProxy
slice override def slice(from : Int, len : Int)
A sub-sequence starting at index from and ending (non-inclusive) at index until (non-strict) [details]
param
until - The index of the element following the slice
from - The index of the first element of the slice
throws
IndexOutOfBoundsException - if from < 0 or length < from + len
Seq[A]
slice def slice(from : Int)
A sub-sequence starting at index from and extending up to the length of the current sequence (non-strict) [details]
param
from - The index of the first element of the slice
throws
IndexOutOfBoundsException - if from < 0
 Seq[A] Seq
startsWith def startsWith[B](that : Seq[B])
[details]
return
- true if this sequence start with that sequences
see
- String.startsWith
 Boolean Seq
subseq def subseq(from : Int, end : Int)
Returns a subsequence starting from index from consisting of len elements [details]
deprecated
- use slice instead
 Seq[A] Seq
synchronized final def synchronized[T0](arg0 : T0) T0 AnyRef
take override def take(n : Int)
Returns a sequence consisting only over the first n elements of this sequence, or else the whole sequence, if it has less than n elements [details]
(non-strict)
param
n - the number of elements to take
return
- a possibly projected sequence
 Seq[A]
takeWhile override def takeWhile(p : (A) => Boolean)
Returns the longest prefix of this sequence whose elements satisfy the predicate p [details]
param
p - the test predicate.
return
- the longest prefix of this sequence whose elements satisfy the predicate p.
Seq[A]
toArray override def toArray[B >: A]
Converts this sequence to a fresh Array with length elements
Array[B]
toString override def toString String Proxy
wait final def wait Unit AnyRef
wait final def wait(arg0 : Long) Unit AnyRef
wait final def wait(arg0 : Long, arg1 : Int) Unit AnyRef
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