art of computer programming volume 1 pdf

This article is Senlie original, reprint please retain this address: Http://blog.csdn.net/zhengsenlie1. After creating a thread pool in the program startup phase, just let the main thread call accept and pass the client connection to an available thread in the pool.Used to maintain information-based thread structure for each thread typedef struct {pthread_tthread_tid;/* thread ID */longthread_count;/* processing the number of connections */} Thread; thread*tptr;/* the thread structure pointer to

This article is Senlie original, reprint please retain this address:Http://blog.csdn.net/zhengsenlie1. File lock file system operation, more time-consuming2. Thread locking is not only suitable for locking between threads in the same process, but also for locking between different processes.3. Use thread lockout requirements between different processes:1) The mutex variable must be stored in a memory area shared by all processes2) must inform the thre

This article is Senlie original, reprint please retain this address: Http://blog.csdn.net/zhengsenlie1. After a thread pool is created in the program startup phase, only the main thread calls accept and passes the client connection to one of the available threads in the pool.The thread structure that is used to maintain information about each thread the typedef struct {pthread_tthread_tid;/* Threads ID */longthread_count;/* processing the number of connections */} Thread; thread*tptr;/* the thre

This article is Senlie original, reprint please retain this address:Http://blog.csdn.net/zhengsenlie1. Create a thread for each customer request in lieu of deriving a child process for each customer/* include serv06 */#include "unpthread.h" intmain (int argc, char **argv) {INTLISTENFD, Connfd;voidsig_int (int); Void*doit (void *);p Thread_ttid;socklen_tclilen, Addrlen;struct sockaddr*cliaddr;//1. Create a listener socket if (argc = = 2) LISTENFD = Tcp

package 247A.1 NumPy and SciPy 247a.1.1 Windows 247a.1.2 Mac OS X 247a.1.3 Linux 248A.2 Matplotlib 248A.3 PiL 248A.4 LIBSVM 249A.5 OpenCV 249a.5.1 Windows and UNIX 249a.5.2 Mac OS X 249a.5.3 Linux 250A.6 vlfeat 250A.7 Pygame 250A.8 PYOPENGL 250a.9 Pydot 251a.10 Python-graph 251a.11 Simplejson 252a.12 Pysqlite 252a.13 CherryPy 252Appendix B Image Set 253B.1 Flickr 253B.2 Panoramio 254B.3 Oxford University v

mutually agreed upon by the parties concerned). Definition: An interface that is independent of the system platform and programming language through which programs and scripts can dynamically access and modify the content, structure, and style of the document. JavaScript is just one of the languages in which the DOM is used.Second, JavaScript syntax1. Writing JavaScript scripts requires only a text editor and a Web browser.Insert the JavaScript scrip

# # #R语言编程艺术 =====# # # #chr1. Quick Start ======#交互模式Mean (ABS (Rnorm (100)))Rnorm (10)Source ("Z.R")#批处理模式SETWD ("/USERS/TANG/DOWNLOADS/R Language Programming Art/")#shell命令运行脚本#R CMD BATCH Z.RData () # #查看内置数据集Mean (Nile)SD (Nile)hist (Nile)hist (Nile, breaks = 12)Q () #linux ctrl-d mac:cmd-d#赋值运算符: #超赋值运算符: X Mode (x)typeof (X)Y Mode (y)typeof (Y)U V M MM%*% C (##%*%) matrix multiplicationx X#列表的常用方法: F

This book is different from other R language Reference books in hand, and mainly interprets the R language from a programmatic perspective, not from a statistical perspective. Because these are not considered in depth, the code is often a collection of commands, not a "program", so hopefully learning this book will improve programming efficiency and make you more like a "programmer".This article corresponds to the "R Language

Now that we are in the 21st century, it is hard to imagine that Java-related books are so scarce, but this is just the case with Java. All the Java-related books were basically published by several Sun engineers, such as the "Hooked on Java" written by Arthur Van Hoff et.al and "The Java" written by Patrick Naughton. Handbook ". Of course, these books fill the gaps in Java, but each book has 3, 400 pages, which assume that readers understand the program, especially object-oriented

; An object is a data entity that is composed of properties and methods, and in JavaScript, properties and methods are accessed using the "dot" syntax: Object.property Object.Method () Creating a new instance of a given object requires the use of the New keywordvar new person;2.7.1 Built-in objects　JavaScript provides a set of pre-defined objects that can be used to refer to the built-in objects. There are many built-in objects in JavaScript, including the array object, th

IDgetElementsByTagName (tagname) return a collection of objects in an array--document that all elements are tagnameGetelementsbyclassname (classname) return a collection of all objects in the array--document that are named ClassName (this method is new in the HTML5 DOM)* Here's a small thing to do, because HTML5 DOM provides getelementsbyclassname, so there may be browsers that don't. But I don't think so, so I can hand-getelementsbyclassname aThere are tutorials and code in the book, and I'll

Java concurrent programming art note Chapter 3 (1), java chapter 3 1. Java threads communicate with programmersTransparent, But itsMemory visibility problemsYesCauseOther weird issues; 2. Two key issues need to be considered in parallel programming:

The first chapter:1.DOM: is a set of methods for abstracting and conceptualizing the content of a document, which is an API.2.W3C definition of DOM: An excuse that is independent of the system platform and programming language programs and scripts can dynamically access and modify document content, structure, and style through this interface.3.Ajax: Asynchronous data transmission, H5 4.JavaScript Basic Synt

"UNIX Network Programming Volume 1" Source code can be downloaded from www.unpbook.com. The directory after decompression is unpv13e.1. CompilingTo enter the unpv13e directory, compile as follows:1./Configure2 3 cd Lib4 Make //may encounter problems: redefinition of ' struc

Original: http://cstdlib.com/tech/2014/10/09/read-unix-network-programming-1/The article is written very clearly, suitable for beginnersRecently read the "UNIX Network programming Volume 1: Socket Networking API," the English name is UNIX network

;publicclassmain{ publicstaticvoidmain (String[]args) { scannerin=newscanner (system.in); stringnum=in.next ();int Result=0;while (result!=6174) { intleft=0; intright=0; char[]temp=creat (num); char[]l=newchar[4]; arrays.sort (temp); for (inti=3;i>=0;i--) { left=left*10+temp[i]-' 0 '; right=right*10+temp[3-i]-' 0 '; l[i]=temp[3-i] ;} if (left==right) { system.out.println (Newstring (L) + "-" +new String (temp) + "=0000"); return;} result=left-right; system.out.println (Newstring (L) + "-" +newst

' inet_ntop ':6INET_NTOP.C: the: at: Warning: ' Best.len ' may used uninitializedinchThisfunction[-wmaybe-Uninitialized]7 if(Best.base = =-1|| Cur.len >Best.len)8^9INET_NTOP.C:123: -: Note: ' Best.len ' was declared hereTenstruct {intbase, Len;} Best, cur; One^ A GCC-I.. /lib-g-o2-d_reentrant-wall-c-o inet_pton.o inet_pton.c - arRv.. /libunp.a in_cksum.o INET_NTOP.O inet_pton.o -AIN_CKSUM.O theAINET_NTOP.O -AINET_PTON.O -Ranlib. /libunp.aAt this

to readable intreadable_timeo (int fd, int Sec) {fd_setrset; struct timevaltv; // 1. set the descriptor set fd_zero ( rset); fd_set (FD, rset); // 2. set the number of seconds to wait TV. TV _sec = sec; TV. TV _usec = 0; // 3. blocking return (select (FD + 1, rset, null, null, TV) on select )); /* 4> 0 if descriptor is readable */}/* end readable_timeo */intreadable_timeo (int fd, int Sec) {INTN; If (n

Assume is s a string of lower case characters.Write A program This prints the longest substring of in s which the letters occur in alphabetical order. For example, if s = ‘azcbobobegghakl‘ , then your program should printLongest substring in alphabetical order Is:begghIn the case of ties, print the first substring. For example, if s = ‘abcbcd‘ , then your program should printLongest substring in alphabetical order IS:ABC# Paste Your code into this boxCount = 1result = S[0]While S:Newcount = 1New

My computer history (programming) (Part 1)I can't remember the first few times that I couldn't sleep late at night and wanted to get up and write something. Recently I read many history of my computers, and wrote a lot of good stuff. It also aroused many memories of my childhood, those memories are full of passion. So I want to recall my