<!doctype html>
<title>CodeMirror: Scala mode</title>
<meta charset="utf-8"/>
<link rel=stylesheet href="../../doc/docs.css">
<link rel="stylesheet" href="../../lib/codemirror.css">
<link rel="stylesheet" href="../../theme/ambiance.css">
<script src="../../lib/codemirror.js"></script>
<script src="../../addon/edit/matchbrackets.js"></script>
<script src="clike.js"></script>
<div id=nav>
<a href="http://codemirror.net"><h1>CodeMirror</h1><img id=logo src="../../doc/logo.png"></a>
<ul>
<li><a href="../../index.html">Home</a>
<li><a href="../../doc/manual.html">Manual</a>
<li><a href="https://github.com/codemirror/codemirror">Code</a>
</ul>
<ul>
<li><a href="../index.html">Language modes</a>
<li><a class=active href="#">Scala</a>
</ul>
</div>
<article>
<h2>Scala mode</h2>
<form>
<textarea id="code" name="code">
/* __ *\
** ________ ___ / / ___ 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 co
没有合适的资源?快使用搜索试试~ 我知道了~
资源推荐
资源详情
资源评论
收起资源包目录
资料梳理计划.zip (962个子文件)
jmxremote.access 4KB
AUTHORS 6KB
fontconfig.bfc 4KB
blacklist 4KB
cacerts 102KB
blacklisted.certs 1KB
jvm.cfg 623B
classlist 82KB
javacpl.cpl 159KB
editormd.css 77KB
easyui.min.css 47KB
ueditor.css 44KB
easyui.css 39KB
ueditor.min.css 34KB
ambiance.css 26KB
video-js.css 21KB
image.css 19KB
katex.min.css 18KB
video.css 15KB
app.css 15KB
attachment.css 15KB
video-js.min.css 11KB
codemirror.css 8KB
shCoreDefault.css 7KB
codemirror.min.css 5KB
mdn-like.css 5KB
solarized.css 5KB
scrawl.css 4KB
setup.css 4KB
merge.css 3KB
lint.css 3KB
codemirror.css 3KB
xq-dark.css 3KB
note.css 3KB
charts.css 3KB
background.css 2KB
login.css 2KB
style.css 2KB
lesser-dark.css 2KB
pastel-on-dark.css 2KB
xq-light.css 2KB
tomorrow-night-eighties.css 2KB
erlang-dark.css 2KB
zenburn.css 2KB
twilight.css 2KB
midnight.css 2KB
vibrant-ink.css 2KB
mbo.css 2KB
base16-dark.css 2KB
base16-light.css 2KB
tern.css 2KB
emotion.css 2KB
3024-night.css 2KB
paraiso-dark.css 2KB
paraiso-light.css 2KB
dialogbase.css 2KB
tomorrow-night-bright.css 2KB
3024-day.css 2KB
blackboard.css 2KB
music.css 2KB
colorforth.css 2KB
icon.css 2KB
icon.css 2KB
the-matrix.css 2KB
night.css 2KB
rubyblue.css 2KB
monokai.css 1KB
QRCodeBuilder.css 1KB
cobalt.css 1KB
simplescrollbars.css 1KB
edittable.css 1KB
eclipse.css 1KB
FtpClientTool.css 1KB
HttpTool.css 1KB
template.css 1KB
neo.css 932B
note-contentsearch.css 841B
elegant.css 768B
neat.css 693B
show-hint.css 662B
startup-loading.css 617B
webuploader.css 515B
dialog.css 502B
tiki.css 440B
foldgutter.css 435B
help.css 395B
FtpServer.css 256B
tiddlywiki.css 220B
matchesonscrollbar.css 188B
fullscreen.css 116B
ambiance-mobile.css 103B
iframe.css 42B
tzdb.dat 103KB
data 2.18MB
currency.data 4KB
data 4KB
jfxwebkit.dll 50.85MB
jvm.dll 3.71MB
awt.dll 1.13MB
ucrtbase.dll 1.09MB
共 962 条
- 1
- 2
- 3
- 4
- 5
- 6
- 10
资源评论
- liangjian1987042021-06-27不是源码?
足信方为
- 粉丝: 82
- 资源: 12
上传资源 快速赚钱
- 我的内容管理 展开
- 我的资源 快来上传第一个资源
- 我的收益 登录查看自己的收益
- 我的积分 登录查看自己的积分
- 我的C币 登录后查看C币余额
- 我的收藏
- 我的下载
- 下载帮助
安全验证
文档复制为VIP权益,开通VIP直接复制
信息提交成功