创建新对象而不分配给引用 [英] creating new objects without assignment to a reference

问题描述

您好，


我想知道创建新对象而无需分配给

参考像这样：


...

新员工（John，Woo）;

.. ..


这是一个很好的编程习惯吗？垃圾收集器

如何处理这个问题？

Hello,

I want to know about "creating new objects without assignment to a
reference" like this :

...
new Employee("John","Woo");
....

Is this a good programming practice ? How does garbage collector
handle this issue ?

推荐答案

Hi Murat，


当代码离开当前代码块并被GC吃掉时，对象将超出范围。您需要一些存储引用的方法，因为这是GC确定是否应该销毁对象的方式。没有参考 - >吃吧！


2005年5月3日星期二09:29:25 +0200，Murat Ozgur< mu ******** @ gmail.com>写道：

Hi Murat,

The object will fall out of scope when your code leaves the current code block and eaten by GC. You need some way of storing a reference as this is how GC determines if an object should be destroyed. No reference -> Eat it!

On Tue, 03 May 2005 09:29:25 +0200, Murat Ozgur <mu********@gmail.com> wrote:

你好，

我想知道创建新对象而不分配
参考像这样：

...
新员工（John，Woo）;
....

这是一个好的编程习惯？垃圾收集器如何处理这个问题？

Hello,

I want to know about "creating new objects without assignment to a
reference" like this :

...
new Employee("John","Woo");
....

Is this a good programming practice ? How does garbage collector
handle this issue ?

-

快乐编码！

Morten Wennevik [C＃MVP]

--
Happy coding!
Morten Wennevik [C# MVP]

该对象是立即垃圾，除非它被用作参数。如果是参数...


static void Foo（对象o）

{

}


static void Main（）

{

Foo（new object（））;

}


然后在这种情况下，对象以参数o为根，当方法完成时（可能在依赖Foo实现之前），对象将是垃圾 - 除非它将对象分配给某个地方的某个字段延长其生命周期。


问候


Richard Blewett - DevelopMentor
http://www.dotnetconsult.co.uk/weblog
http://www.dotnetconsult.co.uk


你好，


我想知道创建新对象而不分配给

参考像这样：


...

新员工（John，Woo）;

.. ..


这是一个很好的编程习惯吗？垃圾收集器

如何处理这个问题？

That object is immediate garbage unless it is being used as a parameter. If it is a parameter ...

static void Foo(object o)
{
}

static void Main()
{
Foo( new object() );
}

then in this case the object is rooted by the parameter o and when the method finishes (possibly before depending on the Foo implementation) the object will be garbage - unless it assigns the object to a field somewhere to extend its lifetime.

Regards

Richard Blewett - DevelopMentor
http://www.dotnetconsult.co.uk/weblog
http://www.dotnetconsult.co.uk

Hello,

I want to know about "creating new objects without assignment to a
reference" like this :

...
new Employee("John","Woo");
....

Is this a good programming practice ? How does garbage collector
handle this issue ?

对象永远不在范围内 - 它没有分配给任何东西 - 它的瞬间垃圾一旦GC运行就会收集它 - 无论是在代码块还是以后


问候


Richard Blewett - DevelopMentor
http://www.dotnetconsult.co.uk/weblog
http://www.dotnetconsult.co.uk

Hi Murat，


当代码离开当前代码块并被GC吃掉时，该对象将超出范围。您需要一些存储引用的方法，因为这是GC确定是否应该销毁对象的方式。没有参考 - >吃吧！

The object is never in scope - its not assigned to anything - its instant garbage as soon as the GC runs it will collect it - whether its in the code block or later

Regards

Richard Blewett - DevelopMentor
http://www.dotnetconsult.co.uk/weblog
http://www.dotnetconsult.co.uk

Hi Murat,

The object will fall out of scope when your code leaves the current code block and eaten by GC. You need some way of storing a reference as this is how GC determines if an object should be destroyed. No reference -> Eat it!

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