atd supplement

multicast addresses, and the receiving end will not receive the message at this time. From the multicast results, we can see that only processes with the multicast address 224.0.0.2 can receive information. Note:It can be seen from the above: whether it is broadcast or multicast, the port number of the Process sent to it cannot be known only from the received information, therefore, both broadcast and multicast messages are sent anonymously. By understanding UDP broadcast and multicast,

Rvi0 is the remote virtual interface, which means that an iOS device interface is virtualized on your Mac, and then the packets on this interface are captured through tcpdump. sudo tcpdump -i rvi0 -n -s 0 -w dump.pcap tcp Explain the meanings of the preceding important parameters: -I rvi0: select the interface to be crawled as rvi0 (Remote Virtual Interface) -S 0: capture all data packets -W dump. pcap: Set the name of the saved file. TCP captures only TCP Packets After tcpdump runs,

that the most important dealers place orders online and quickly obtain the corresponding quotation and execution information, therefore, such a solution is also suitable. According to the introduction of the bank, the bank is also making great explorations and attempts to do so. Today, there may not be many enterprises using this technology, and they also need to invest a lot of money in R D, however, the big trend is still to carry out relevant business activities on the Internet, so the b

system analyzes the investment income and risks, optimizes the combination, and maximizes the expected excess income on the basis of effective risk control. Of course, quantitative investment also has its limitations, such as strong dependence on historical data and lack of full understanding of the company's management mechanism. In fact, any investor method inevitably has its advantages and disadvantages. Active qualitative investment and active quantitative investment can generate excess pr

=" Qq20160809225730.png "alt=" Wkiol1ep73edvvssaaay1gugloc269.png-wh_50 "/>2, clue two tree Search parent Node graph interpretationUse the null pointer to point to the precursor, the successor node.650) this.width=650; "Src=" Http://s4.51cto.com/wyfs02/M00/85/9C/wKiom1ep9Z6zQy9WAABRj50VdzA198.png-wh_500x0-wm_3 -wmp_4-s_2805794028.png "title=" Qq20160809232339.png "alt=" Wkiom1ep9z6zqy9waabrj50vdza198.png-wh_50 "/>3, programming when the Const some attention(1), in C + +, when we pass a constant,

,input:type=password;textarea;input:type=hidden) button (Submit,reset,button image) selection (radio , Checkbox,select,file) d.value=xxxx; var s = d.value;(2) Non-form element: H1...h6,p,div,ul,ol,li d.innerhtml = xxxx; var s = d.innerhtml;3. Manipulating element properties:D.setattribute (name, value) var s = d.getattribute (name) d.removeattribute (name);4. Operation element Style:(1) inline style: D.style.backgroundcolor = "#FFFF00"; var s = d.style.backgroundcolor;(2) Class attribute: D.clas

. Message communicationNow in the major social communication projects on-line, actually does not use the message queue to do instant communication, but it can be used to do, interested may wish to try itThis is point-to-point communication, where consumers A and B subscribe to Message Queuing and are also manufacturers to achieve point-to-point communicationThe practice of group chat, where all clients subscribe to the queue at the same time, are also sent, the manufacturer.---------------------

following form defines the array of the Data resistance pointer.It seems that this can also be done.INT (* p2arr) [2] [2];At first glance, it seems yes, but think about it carefully. Previously definedA pointer to a two-dimensional array orArray pointer instead of array pointer array. This should be easy to understand. The last time I talked about how to convert int [] array declaration and int * types to function parameters.Here is a supplement. We

Solution to the compatibility problem between the simyuan font and Java in Linux (Supplement) In the previous article, I talked about the compatibility between the Thinking Source and Java in the Linux environment. Later, after testing, I found that, by default, the installed source simhei font contains both simplified and traditional fonts, and the corresponding language encoding is also different. After you try to unmount the traditional Chinese fo

Article 3. Pre-development knowledge supplement: length units and screen resolutions of Android, which are also reproduced ~~, Android screen resolutionThis article is a bit early, but it is very practical. For more information about the Unit, see the red part. Screen Resolution Basics 1. terms and concepts Terms Description Remarks Screen size) It refers to the actual physical size of the mobile phone, such as the commonly

Add the command to supplement logs for all columns of a table, table log command GGSCI (gg321) 47> exit [oracle @ gg321 ggs] $ sqlplus/as sysdbaSQL * Plus: Release 10.2.0.4.0-Production on Sun Apr 19 14:50:10 2015 Copyright (c) 1982,200 7, Oracle. all Rights Reserved. connected to: Oracle Database 10g Enterprise Edition Release 10.2.0.4.0-ProductionWith the Partitioning, OLAP, data Mining and Real Application Testing optionsSQL> SQL> ALTER TABLE USER

JDBC evolution 3-supplement: transaction processing, jdbc3 -- Next, the evolution of JDBC 3. Let's talk about database transactions.Transaction:A group of logical operation units that convert data from one state to another.How can this problem be solved?A set of logical units: I think it refers to multiple DML operations. If it is just a DML statement, mysql will automatically submit the statement after the execution is successful. If it fails, in th

Text-align center and float supplement, text-alignfloat The center attribute of text-align has the following features: 1. Apply the text-align center to a container. It only targets the text in the container and the display in the container as inline or inline-block, if the container display is block, the container is not centered. 2. text-align is downstream and will be continuously transmitted to child elements. The comparison between blue an

[Binwood Lua column] basic Supplement 04: for Loop and iterator secrets, lua Column As we introduced in the previous article, the for loop can be used to call the iterator, which is very simple. So what does this for loop do? Of course I didn't go to the source code. I just read a book. The materials are from the second edition of Lua program design. If there is no error in the content of this book, there will be no errors in this article theoreticall

Author: vamei Source: http://www.cnblogs.com/vamei welcome reprint, please also keep this statement. Thank you! Here are some tips I have learned when using python. These skills are frequently used when I use python. I recorded it in my notebook in a very fragmented manner. Now I will sort it out and share it with you. It also serves as a supplement to the python quick tutorial. Import Module In python, the import declaration is often used

] [varchar](50) COLLATE Chinese_PRC_CI_AS NULL, CONSTRAINT [PK_Table_Id] PRIMARY KEY CLUSTERED ( [Id] ASC)WITH (IGNORE_DUP_KEY = OFF) ON [PRIMARY]) ON [PRIMARY]GO First, let's take a look at the test code:Code To eliminate the above concerns, only one test method is used each time (no code is commented every time ). 1. Write test of auto-increment ID. Write test of 1.2.guid. 2. 1. Test the function of reading auto-incremental IDs to the datatable. 2.2.guid read to datatable Test . Statist

After posting the article "a sns strategic casual game development Note 01-Distributed System Logical Architecture Design ()", I was very happy to receive some bloggers, in addition, some friends enthusiastically gave some suggestions: @ Phantaci.com: "We recommend that you design a DB front-end. The DB front-end is used to connect multiple databases of the game. The DB front-end is a data access proxy server ." @ Black suggestion: "After logon, all interactions must be handled through internal

Supplement and improve the article "Identify source code error lines by means of crash addresses only" Author: ROC of Shanghai weigong Communication After reading Lao Luo's article "finding the error line of source code through the crash address" ("Luo Wen"), I feel that this Article can still learn a lot. However, there are still some improper statements in this article, and some operations are too cumbersome. After studying this article, I have supp

, these databases named after numbers are different from the databases we understand. Redis does not support user-defined database names. Each database is named by number. Developers must record which databases store the data themselves. In addition, redis does not support setting different access passwords for each database. Therefore, a client can either access all the databases or access one database. The most important thing is that multiple databases are not completely isolated. For example

This article describes how to use NUnit to test the Private and Protected methods in. NET. I have previously written an article to introduce the usage of NUnit. Click here to get the details of this article. this article explains the basic usage and advanced usage of NUnit. when I read the hibernate Article http://netflu.cnblogs.com/archive/2005/08/26/223294.html, I think the private and protected methods should be added. This article is complete. In my project, I have never tested the private