iterable

Handle iteration manually , by defining your own implementation of Iterable .

手动处理遍历，定义自己的Iterable实现。

Extend an existing collection class that already implements Iterable ( and therefore already supports for / in ) .

扩展现有的、已经实现了Iterable（因此也就已经支持for/in）的集合类。

Actually , this enhancement works with any object that implements the Iterable interface , not just Collections .

实际上，这个增强适用于实现Iterable接口的任何对象，而不仅仅是Collections。

But , just like Iterable , the Enum class is not present in the JDK1.4 class library .

但是，同Iterable一样，在JDK1.4类库中也没有Enum类。

Trying to get an Iterator on a Map fails at compile time & Maps don 't implement the Iterable interface .

在编译时，尝试对Map获取Iterator会导致失败&Map并没有实现Iterable接口。

The Iterable options allow the client to pass additional compiler options that correspond to the javac options .

Iterableoptions允许客户机传递额外的编译器选项，这些选项均对应于javac选项。

For cases where the child collection is obvious and apparent , however , Iterable makes programming against the domain type much easier and more obvious .

但是，如果孩子集合比较明显，Iterable可以使针对域类型的编程更容易，更直观。

The reduce method is passed an Iterable whose type will be the type of the ( key , value ) pairs that are input to it .

对reduce方法传递一个Iterable值，它的类型将是输入它的（key，value）对的类型。

What it understands is scala . Iterable , which defines the basic behaviors for iterating across a collection .

它所了解的是scala.Iterable，scala.Iterable定义了在集合上进行迭代的基本行为。

When iterating over a non-Collection Iterable , the compiler produces an error .

当在非集合的Iterable上迭代时，编译器生成错误。

And , just like Iterable and Enum , the valueOf () methods are not present in the JDK1.4 class library .

而且，就像Iterable和Enum一样，valueOf（）方法在JDK1.4类库中也不存在。

As you can see , though , it takes a lot more to implement the Iterable interface manually than simply extending a class that does this work for you .

但是，您可以看到，与扩展一个现成的类来完成同样的工作相比，手动实现Iterable接口需要做的工作多得多。

The enhanced for loop ( also sometimes known as " for-each " loop ) can be used for collections that implement the Iterable interface and for arrays .

改进for循环（有时被称为“for-each”循环）能够用于实现了iterable接口的集合类及数组中。

Using Iterable has some obvious drawbacks when domain modeling , because only one such collection of objects can be so " implicitly " supported via the iterator () method .

在域建模的时候，使用Iterable有一些明显的缺陷，因为通过iterator（）方法只能那么“隐晦”地支持一个那样的对象集合。

The for-each loop : Retroweaver provides an implementation of the Iterable interface and rewrites classes that implement Iterable to implement its own version instead .

for-each循环：Retroweaver提供了Iterable接口的实现，把实现Iterable的类重写成实现它自己版本的类。

Anything that provides an Iterable facility ( technically a trait in Scala , but think of it for now as an interface ) can be used as the heart of the for expression .

提供Iterable功能（从技术上说，它是Scala中的一个特征，但现在将它视为一个接口）的任何东西都可以用作for表达式的核心。