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Disk类 class Disk { private static float m_size; private static float m_used; public float Size { get {return m_size;} set {m_size=value;} } } m_size是磁盘大小 m_used磁盘已使用空间 创建一个Size属性其类型与字段类型一致 get方法返回m_size的值 set方法设置值 使用方法： static void Main(string[] args) { Disk disk=new Disk(); float c = disk.Size; disk.Size = 100; Console.Write(c); Console.ReadKey(); } 注意： public float Size{set;get;} 此方法会在属性内部创建一个变量，进行get和set与Disk类里的无关 来源： https://my.oschina.net/u/4200853/blog/3101334

I should to develop a web-application in php for a firm, and I need to know the disk free space of the server. At the moment, I'm able to obtain the free disk space of this kind : $quota="104857600"; //100Mb : (100*1024*1024) after, I do the difference between $quota and my size variable. So, in this case, I must to write the disk size directly in the php file... It's possible to do the disk capacity ? disk_free_space - Will return you the number of bytes available on the filesystem or disk partition. disk_total_space - Will return you the number of total bytes (i.e. capacity) on the

Can I set maximum size for an actor's mailbox in Scala? Take the Producer-Consumer problem. With threads I can block the producers when the buffer fills up. I saw a couple of producer-consumer examples written in Scala and they all use actors with mailboxes used as a "buffer". Can I set mailbox size to cause producers to wait until a consumer is ready? Any other elegant solution to avoid uncontrollable growth of mailboxes? You can create an actor that acts as a buffer between the producer and consumer. The buffer checks out its mailbox to its loop data. It sends back an "overload" message to

class MyHome extends StatefulWidget { @override State<StatefulWidget> createState() => new MyHomePage2(); } class MyHomePage2 extends State<MyHome> { List items = new List(); buildlist(String s) { setState(() { print("entered buildlist" + s); List refresh = new List(); if (s == 'button0') { refresh = [ new Refreshments("Watermelon", 250), new Refreshments("Orange", 275), new Refreshments("Pine", 300), new Refreshments("Papaya", 225), new Refreshments("Apple", 250), ]; } else if (s == 'button1') { refresh = [ new Refreshments("Pina Colada", 250), new Refreshments("Bloody Mary", 275), new

spring IOC 控制反转 核心思想 了解IOC，首先需要了解DI --- 软件设计的重要思想 依赖注入 什么事依赖注入呢？ 例子：设计行李箱类 传统写法：首先设计轮子，根据轮子设计底盘，根据底盘设计箱体。OK，设计完成。 换成java中类的描述：1.轮子类：Class Tire { int size;//轮子大小 Tire(){this.size = 20;}} 2.底盘类 : Class Botton {Tire tire;//轮子 Botton(){this.tire = new tire;}} 3.箱体类：Class FrameWork{ Botton botton;//底盘 FramWork() {this.botton = new botton;}} 生成一个行李箱：new FrameWork(); 上层建筑依赖下层建筑。每当需要设计一个新式的行李箱，则需要从轮子到箱体全部需要重新写代码，严重违反了代码的可重用性； DI写法：首先设计箱体，根据箱体选择底盘，根据底盘选择轮子。OK，设计完成。 换成java中类的描述：1.轮子类：Class Tire { int size;//轮子大小 Tire(int size){this.size = size;}} 2.底盘类 : Class Botton {Tire tire;//轮子 Botton(Tire tire)

有时候我们会用到一个数组的键（下标）默认从0开始的需求，让我们来看例子： 1 array (size=2) 2 4 => 3 array (size=3) 4 'goods_name' => string '发放是否' (length=12) 5 'goods_price' => string '1111.00' (length=7) 6 'goods_nums' => string '111' (length=3) 7 5 => 8 array (size=3) 9 'goods_name' => string '是范德萨发 ' (length=16) 10 'goods_price' => string '22.00' (length=5) 11 'goods_nums' => string '113' (length=3) 使用 array_values($数组) 会把数组的键默认从下标0开始 结果： 1 array (size=2) 2 0 => 3 array (size=3) 4 'goods_name' => string '发放是否' (length=12) 5 'goods_price' => string '1111.00' (length=7) 6 'goods_nums' => string '111' (length=3) 7 1 => 8 array

I have read several times that after you delete a row in an InnoDB table in MySQL, its space is not reused, so if you make a lot of INSERTs into a table and then periodically DELETE some rows the table will use more and more space on disk, as if the rows were not deleted at all. Recently I've been told though that the space occupied by deleted rows is re-used but only after some transactions are complete and even then - not fully. I am now confused. Can someone please make sense of this to me? I need to do a lot of INSERTs into an InnoDB table and then every X minutes I need to DELETE records

def size_of_dir(dirname): print("Size of directory: ") print(os.path.getsize(dirname)) is the code in question. dirname is a directory with 130 files of about 1kb each. When I call this function, it returns 4624 , which is NOT the size of the directory...why is this? FRD This value (4624B) represents the size of the file that describes that directory. Directories are described as inodes ( http://en.wikipedia.org/wiki/Inode ) that hold information about the files and directories it contains. To get the number of files/subdirectories inside that path, use: len(os.path.listdir(dirname)) To get