A code block is simply a block of code that returns a value, and if no value is returned then a NULL object is returned.
代码块就是将返回一个值的一组代码，如果没有返回值，那么会返回一个NULL对象。
Unfortunately, many designers have still not learnt that the special null pointer or null object is an equally bad idea.
遗憾的是，许多设计者并没有认识到空指针或空对象带来的危害。
When the output is complete, the stream is flushed by writing a NULL object to the client stream and loop awaiting the next client.
输出完成后，通过向客户端流写入一个NULL对象，而且循环等待下一个客户端，从而刷新流。
Otherwise, there can be confusion over whether an empty array is a null object, an array with no elements, or an array with a single object containing null or empty values.
否则，可能对一个空数组是null对象还是没有任何元素的数组，亦或带有一个对象且此对象包含null或空值的数组产生混淆。
I will provide a uniform explanation for OSC in this dissertation: V2 (with its null subject and null object) is essentially a purpose clause modifying the matrix clause.
本文为动词同宾结构提供了一个统一的解释：这些句子中的V_2（连同其空主语和空宾语）本质上是目的性状语从句。
The first one asserts that the calculator instance object is not null, i.e. it exists.
第一个宣称这个计数器实例对象不是空，就像它实际存在一样。
If the object argument is null, you need to generate a null accessor for the type.
如果对象参数为空，您需要为这个类型生成一个空访问器。
The unit test methods first verify that the object provided is not null, and then perform one or more very basic actions on the object.
单元测试方法首先验证所提供的对象不是空的，然后对该对象执行一个或多个非常基础的操作。
If this is NULL, the object handle cannot be inherited.
如果这个指针为NULL，那么这个对象就不能被初始化。
If there was a problem creating the BIO object, the pointer will be NULL.
如果创建BIO对象时遇到问题，指针将会是NULL。
The second parameter (state) can either be null or an object containing application-specific information.
public void TimerCallback(objectstate);第二个参数（state）可以为空或者是包含程序规范信息的对象。
Therefore, you know that an object has been declared finalizable and possibly, but not necessarily, collected, when the get method of the WeakReference or SoftReference class returns null.
这样，您就可以知道当WeakReference或softreference类的get方法返回null时，就有一个对象被声明为finalizable，而且可能(不过不一定)被收集。
When obj goes out of scope or is explicitly assigned to null, the object is available for collection, assuming there are no other references to it.
当obj超出范围或被显式地指定为null时，垃圾收集器就认为没有对这个对象的其它引用，也就可以收集它了。
Therefore, if the collector runs before line //2 attaches a strong reference to the re-created object, the object is lost and wr.get() returns null.
因此，如果收集器在行 //2在重新创建的对象上施加一个强引用之前运行，对象就会丢失，wr.get()则返回null 。
Listing 3 initializes a new Zend_Soap_Server object in non-WSDL mode, passing a null value as the first argument to the object constructor.
清单3传递一个null值到对象构造函数的第一个参数，以非wsdl模式初始化了一个新的Zend_Soap_Server对象。
In Ruby, however, even null is an object.
但是在Ruby中，甚至null也是一个对象。
Clear: Setting the reference object's referent field to null and declaring the object in the heap that the reference class referred to as finalizable.
清除：将引用对象的referent域设置为 null ，并将引用类在堆中引用的对象声明为 可结束的。
The third TAB in the Twitter panel, following, first checks whether the following object is not null.
Twitter面板内的第三个选项卡是following，它先是检查following对象是否为null。
What you get in your arguments are a reference to the "this" object (this is for object methods and is NULL for plain old functions like bar ) and an argument tuple in args.
您从参数中得到的是一个对“this”对象的引用(this用于对象方法，对类似bar这样的无参数的老式函数来说是NULL)和一个存储在args中的参数元组。
For that effect, JSON defines the following main data structures: number, string, Boolean (true and false), array (an ordered sequence of values), object (collection of key value pairs), and null.
为了实现该目的，JSON定义了以下主要数据结构：数字、字符串、布尔值(真或假)、数组(值的有序排列)、对象(键值对集合)和null。
If the return value is an object, the default is null.
如果返回值是一个对象，默认为空值。
The cure for object loitering in this case is to null out the reference after popping it from the stack, as shown in the commented-out line of code in Listing 3.
修复这种情况下的对象游离的方法是，当对象从堆栈弹出之后，就消除它的引用，如清单3中注释掉的行所示。
Two conditions need to be satisfied in order for serialization to happen: the serializer must be given a supported type and the object to be serialized must be non-null.
为使序列化能够发生，需要满足两个条件：必须为序列化器授予受支持的类型，并且待序列化的对象必须是非空的。
The corresponding field in the business object is automatically set to null.
业务对象中的对应字段将自动设置为空。
A weak reference object will keep a reference to an object that went out of scope or was set to null, until it is actually deleted by the garbage collector.
一个弱引用对象将会保持一个指向一个超出作用域或者被置空的对象的引用，直到它确实被垃圾回收删除。
After working with obj after this if block, you should set obj to null to enable the garbage collector to reclaim this object to take full advantage of weak references.
在使用这个if块之后的obj之后，您应该将ob j设置为null，从而让垃圾收集器能够回收这个对象以充分利用弱引用。
If no comment is associated with a given purchase order object, you might expect this column to be null after persisting the entity.
如果没有任何注释与给定订单对象相关，那么您可能希望在持久化实体后将该列设为null。
To take advantage of these reference classes, you must break the strong reference to the MyObject object by setting obj to null.
要利用这些引用类，您必须取消对MyObject对象的强引用，方法是将ob j设置为null。
Finally, you stop the XMLHttpRequest object by assigning it to null.
最后，通过把XMLHttpRequest对象赋值为null，停止这个对象。
A disadvantage of returning null is that it forces a caller to check for null each time an object is obtained from the pool.
返回null的缺点是，它强迫调用方在每次从池中获得对象时都检查是否为null。
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