vmworld 2015

Record some of the things you read about this book.I. References (reference)The reference has a different name for the object. For example:int ival=1024;int relval1=ival;//to, attention try not to use this way:int relval=ival;int relval2;//error, reference must be initializedWhen a reference is defined, the program binds the reference with its initial value (binding) instead of copying the initial value to the reference. Once the initialization is complete, the reference will always be bound tog

to synchronize the above process, require the complete process to be written, and explain the meaning and initial value of the semaphore."Reference Answer"Semaphore mutexa=1;Semaphore mutexb=1;Semaphore emptya=m;Semaphore emptyb=n;Semaphore fulla=0;Semaphore fullb=0;Code Begina{while (TRUE) {P (Fulla);P (Mutexa)Get a mail from A_mailbox;V (Mutexa);V (Fulla);Answer the question and raise a question;P (EMPTYB);P (MUTEXB)Send the mail to B;V (MUTEXB);V (EMPTYB);}}b{while (TRUE) {P (FULLB);P (MUTEX

, work or process number. Input and Output status: The configuration process uses an I/O device, such as a tape drive. 4. How the Process control block PCB is organized1gt. Linear table mode: Regardless of the state of the process, all PCBs are kept in the system area of the memory continuously. This approach applies to situations where the number of processes in the system is not large. 2> Index Table Method: This method is an improvement of the linear table, the system according to th

First, the preparatory work 1. Overview Springmvc+mybatis+spring+mysql+log4j+maven 2. New Maven project, now Web-app template After you create a new project, the individual directories may be lost and need to be added manually, as shown in the overall directory structure: 3, through MAVEN management dependencies, warehouse address is as follows: Second, mybatis and spring integration 2015/5/3~springmvc+mybatis+spring Integration

rarely used in the most recent period of time, the likelihood of being used in the future is also very small, and The purpose of this algorithm is straightforward to understand that when the cached content needs to be updated and is already full, Quickly find and replace content that is used as often as the lowest number of times in the current entire cache. LRU (least recently used): Most recent unused algorithm, The idea and principle is If a data is in the last is not accesse

For me, which has always been the development of C #, Python is a long-overdue thing to do.The last time a project began to do is to use Python, and later because of the less skilled to be pushed off. Now there is a chance to start the Python journey.Because it is developed under Visual Studio, you naturally do not want to develop the IDE. Fortunately, visual support for Python is so in place, thanks to the masterpiece of Daniel.PTVS Dev 2014-11-20 VS 2015Start testing development quickly.Testin

#include #include #include int main (int argc, char *argv[]){/* Decimal Quasi-change the city any binary program */int ival, base; Ival is the decimal number, base is the binary to be convertedint index = 0;Char arr[32];memset (arr, 0, sizeof (arr));printf ("Input the Ival and base:");scanf ("%d%d", ival, base);while (ival! = 0) {/* The following sentence is the value of the modulo to the corresponding deposit in the array, such as 10 corresponds to the a*/arr[index]= "0123456789ABCDEFGHIJKLMNOP

Match array contents with custom attributes1 DOCTYPE HTML>2 HTML>3 Head>4 title>Match Array Contentstitle>5 MetaCharSet= "Utf-8">6 Script>7 window.onload= function(){8 varabtn=document.getElementsByTagName ('input');9 vararr= ['A','B','C','D'];Ten One for(varI=0; Iabtn.length; I++){ A Abtn[i].num= 0; - - Abtn[i].onclick= function(){ the This. Value=arr[ This. Num]; //not Arr[i] understand - This. Num++; - if( This. Num===arr.

able to study normally.Suppose the school in each class after the completion of another course, the dregs want to know if he will hang the next semester. It is assumed that the slag will not hang in the normal order of subjects.Slag again puzzled, can only ask genius, the result, Ganxiu genius looked at a glance after the conclusion, is worthy of genius.Genius Special Love show, after glancing at it,If the slag hangs up, he will say: "You'll fail some exam, but I think I can deal with it."If th

appropriate to use a unbounded queue, for example, in a Web page server. This queueing can be used to handle transient burst requests, which allow the possibility of an increase in the number of lines that are allowed to occur when the command reaches an average of more than the queue can handle.bounded queues. when using limited maximumpoolsizes, bounded queues (such as arrayblockingqueue) help prevent resource exhaustion, but may be difficult to adjust and control. The queue size and maximum

] =VL; Break; } } if(TOP2 >= 0) {Console.log ("Error:don ' t find out the same sign:" + stack2.slice (0, TOP2 + 1). Join (",")); } Else{console.log (Result.join (", ")); } }());/*chain Table Array Simulation list: Two arrays, an array with corresponding values, an array to be stored relative to the index at the next worthy index, that is, the index table*/ (function () { varNode =function(value, nextnode) { This. Value =value; This. NextNode =Next

[j+ 1] =Data[j]; DATA[J]=Vitem; }}} Console.log (Data.join (", ")); //O (N²)}());(function () { /*Quick Sort Quick-order each round of processing is actually the number of the base of this round, until all the numbers are returned to place. Each exchange is a leap, and the total number of comparisons and exchanges is less. Determines the order in which the base number is correct on both sides. Based on the idea of "dichotomy"*/ vardata = [6, 9, 3, 7, 1, 5, 4,

;[[email protected] hi]# find/etc-mtime-7[[email protected] ~]$ find/etc-size 20k-type F8, create the directory/test/data, let a group of ordinary users have write permissions to it, and all the files created by the group is the directory belongs to the group; In addition, each user can only delete their own files.[Email protected] hi]# mkdir-p/test/data [[email protected] hi]# chown root.tomcat/test/data[[email protected] hi]# US Ermod-g Tomcat Nginx[[email protected] hi]# usermod-g tomcat hado

What hardware do Linux enthusiasts like to use and which distributions? Recently Openbenchmarking.org did a 2015 data statistics and comb, Linux story deliberately organized a bit, share to everyone.Reproduced in: http://www.itxuexiwang.com/a/liunxjishu/2016/0228/181.html?1456926080Openbenchmarking.org enables the new PTS 6.2-gamvik code base to be refactored, while using a more powerful server--which will keep our stats fun. We have been insisting on

complete/data/aaa/directory with one commandMkdir-p/DATA/AAA/B/C/Dtree/data/Display tree structure10. It is known that the Test.txt file already exists in the/tmp directory, how to execute the command in order to copy the/mnt/test.txt to/tmp and overwrite the/tmp/test.txt, and the Linux system does not prompt to overwrite/bin/cp/mnt/test.txt/tmp/test.txt\cp/mnt/test.txt/tmp/test.txt11. Only the contents of lines 20th through 30th in the Ett.txt file (100 included) are produced.This article is f