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/* __ *\
** ________ ___ / / ___ Scala API **
** / __/ __// _ | / / / _ | (c) 2003-2011, LAMP/EPFL **
** __\ \/ /__/ __ |/ /__/ __ | http://scala-lang.org/ **
** /____/\___/_/ |_/____/_/ | | **
** |/ **
\* */
package scala.collection
import generic._
import mutable.{ Builder, ListBuffer }
import annotation.{tailrec, migration, bridge}
import annotation.unchecked.{ uncheckedVariance => uV }
import parallel.ParIterable
/** A template trait for traversable collections of type `Traversable[A]`.
*
* $traversableInfo
* @define mutability
* @define traversableInfo
* This is a base trait of all kinds of $mutability Scala collections. It
* implements the behavior common to all collections, in terms of a method
* `foreach` with signature:
* {{{
* def foreach[U](f: Elem => U): Unit
* }}}
* Collection classes mixing in this trait provide a concrete
* `foreach` method which traverses all the
* elements contained in the collection, applying a given function to each.
* They also need to provide a method `newBuilder`
* which creates a builder for collections of the same kind.
*
* A traversable class might or might not have two properties: strictness
* and orderedness. Neither is represented as a type.
*
* The instances of a strict collection class have all their elements
* computed before they can be used as values. By contrast, instances of
* a non-strict collection class may defer computation of some of their
* elements until after the instance is available as a value.
* A typical example of a non-strict collection class is a
* <a href="../immutable/Stream.html" target="ContentFrame">
* `scala.collection.immutable.Stream`</a>.
* A more general class of examples are `TraversableViews`.
*
* If a collection is an instance of an ordered collection class, traversing
* its elements with `foreach` will always visit elements in the
* same order, even for different runs of the program. If the class is not
* ordered, `foreach` can visit elements in different orders for
* different runs (but it will keep the same order in the same run).'
*
* A typical example of a collection class which is not ordered is a
* `HashMap` of objects. The traversal order for hash maps will
* depend on the hash codes of its elements, and these hash codes might
* differ from one run to the next. By contrast, a `LinkedHashMap`
* is ordered because it's `foreach` method visits elements in the
* order they were inserted into the `HashMap`.
*
* @author Martin Odersky
* @version 2.8
* @since 2.8
* @tparam A the element type of the collection
* @tparam Repr the type of the actual collection containing the elements.
*
* @define Coll Traversable
* @define coll traversable collection
*/
trait TraversableLike[+A, +Repr] extends HasNewBuilder[A, Repr]
with FilterMonadic[A, Repr]
with TraversableOnce[A]
with GenTraversableLike[A, Repr]
with Parallelizable[A, ParIterable[A]]
{
self =>
import Traversable.breaks._
/** The type implementing this traversable */
protected type Self = Repr
/** The collection of type $coll underlying this `TraversableLike` object.
* By default this is implemented as the `TraversableLike` object itself,
* but this can be overridden.
*/
def repr: Repr = this.asInstanceOf[Repr]
/** The underlying collection seen as an instance of `$Coll`.
* By default this is implemented as the current collection object itself,
* but this can be overridden.
*/
protected[this] def thisCollection: Traversable[A] = this.asInstanceOf[Traversable[A]]
/** A conversion from collections of type `Repr` to `$Coll` objects.
* By default this is implemented as just a cast, but this can be overridden.
*/
protected[this] def toCollection(repr: Repr): Traversable[A] = repr.asInstanceOf[Traversable[A]]
/** Creates a new builder for this collection type.
*/
protected[this] def newBuilder: Builder[A, Repr]
protected[this] def parCombiner = ParIterable.newCombiner[A]
/** Applies a function `f` to all elements of this $coll.
*
* Note: this method underlies the implementation of most other bulk operations.
* It's important to implement this method in an efficient way.
*
*
* @param f the function that is applied for its side-effect to every element.
* The result of function `f` is discarded.
*
* @tparam U the type parameter describing the result of function `f`.
* This result will always be ignored. Typically `U` is `Unit`,
* but this is not necessary.
*
* @usecase def foreach(f: A => Unit): Unit
*/
def foreach[U](f: A => U): Unit
/** Tests whether this $coll is empty.
*
* @return `true` if the $coll contain no elements, `false` otherwise.
*/
def isEmpty: Boolean = {
var result = true
breakable {
for (x <- this) {
result = false
break
}
}
result
}
/** Tests whether this $coll is known to have a finite size.
* All strict collections are known to have finite size. For a non-strict collection
* such as `Stream`, the predicate returns `true` if all elements have been computed.
* It returns `false` if the stream is not yet evaluated to the end.
*
* Note: many collection methods will not work on collections of infinite sizes.
*
* @return `true` if this collection is known to have finite size, `false` otherwise.
*/
def hasDefiniteSize = true
def ++[B >: A, That](that: GenTraversableOnce[B])(implicit bf: CanBuildFrom[Repr, B, That]): That = {
val b = bf(repr)
if (that.isInstanceOf[IndexedSeqLike[_, _]]) b.sizeHint(this, that.seq.size)
b ++= thisCollection
b ++= that.seq
b.result
}
@bridge
def ++[B >: A, That](that: TraversableOnce[B])(implicit bf: CanBuildFrom[Repr, B, That]): That =
++(that: GenTraversableOnce[B])(bf)
/** Concatenates this $coll with the elements of a traversable collection.
* It differs from ++ in that the right operand determines the type of the
* resulting collection rather than the left one.
*
* @param that the traversable to append.
* @tparam B the element type of the returned collection.
* @tparam That $thatinfo
* @param bf $bfinfo
* @return a new collection of type `That` which con
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《基于JavaWeb的医院挂号及管理系统,使用SSM框架+MySQL实现》+源代码+文档说明 (1287个子文件)
all-wcprops 2KB
all-wcprops 2KB
all-wcprops 1KB
DoctorController.class 4KB
DoctorController.class 4KB
UserController.class 4KB
UserController.class 4KB
RegisterController.class 3KB
RegisterController.class 3KB
DepartmentController.class 3KB
DepartmentController.class 3KB
Register.class 3KB
Register.class 3KB
User.class 2KB
User.class 2KB
DoctorServiceImpl.class 2KB
DoctorServiceImpl.class 2KB
Doctor.class 2KB
Doctor.class 2KB
DepartmentServiceImpl.class 2KB
DepartmentServiceImpl.class 2KB
RegisterServiceImpl.class 2KB
RegisterServiceImpl.class 2KB
LoginInterceptor.class 1KB
LoginInterceptor.class 1KB
Department.class 1KB
Department.class 1KB
UserServiceImpl.class 1KB
UserServiceImpl.class 1KB
DoctorService.class 656B
DoctorService.class 656B
DoctorDao.class 644B
DoctorDao.class 644B
RegisterService.class 557B
RegisterService.class 557B
RegisterDao.class 545B
RegisterDao.class 545B
DepartmentService.class 460B
DepartmentService.class 460B
DepartmentDao.class 448B
DepartmentDao.class 448B
UserDao.class 341B
UserDao.class 341B
UserService.class 271B
UserService.class 271B
.classpath 1KB
org.eclipse.wst.common.component 643B
org.eclipse.wst.jsdt.ui.superType.container 49B
main.css 241KB
main.css 241KB
icon.css 229KB
icon.css 229KB
summernote-bs3.css 143KB
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style.css 134KB
style.css 134KB
bootstrap.min.css 118KB
bootstrap.min.css 118KB
animate.css 64KB
animate.css 64KB
datepicker3.css 33KB
datepicker3.css 33KB
font-awesome.css 32KB
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bootstrap-rtl.css 31KB
bootstrap-rtl.css 31KB
font-awesome.min.css 26KB
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ambiance.css 25KB
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style.min.css 25KB
style.min.css 25KB
sweetalert.css 18KB
sweetalert.css 18KB
simditor.css 17KB
simditor.css 17KB
ui.jqgrid.css 16KB
ui.jqgrid.css 16KB
layer.css 14KB
layer.css 14KB
umeditor.min.css 14KB
umeditor.min.css 14KB
jasny-bootstrap.min.css 14KB
jasny-bootstrap.min.css 14KB
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