precalculus chapters

echo "Top Ten Disk Space Usage" echo "for $CHECK _directories Directory" For Dir_check in $CHECK _directories Do echo "" echo "The $DIR _check Directory:" Du-s $DIR _check 2>/dev/null | Sort-rn | Sed ' {one, $D; =} ' | Sed ' N; s/\n//' | Gawk ' {printf $ ': "\ T" $ "t" $ "\ n"} ' Done Exit [Email protected]:~/shell/24zhang$ Run:./big_user.shOnly two directories/var/log/home are specified above, and the generated report is disk_space_$date.rpt here.This script

After tossing the crawler and some interesting content, I recently in the R language for simple machine learning knowledge, the main reference is "machine learning-Practical Case Analysis" this book.This book is a rare, purely r language-based machine learning knowledge, covering 11 cases. Divided into 12 chapters. Both the author's notes and the code sections are quite deep. But perhaps because the book earlier, in the data processing aspect, he uses

Nine Chapters count judges Net-original websitehttp://www.jiuzhang.com/problem/72/TopicsGiven a number, the answer to its square root can be obtained without the sqrt of the system function.Online testhttp://www.lintcode.com/en/problem/sqrtx/AnswerWe have two methods for this topic:Method 1:2-point method. We know that if Y represents the value of the square root of x, then we can determine the 0Method Two: Newton iterative method. Computes the soluti

Nine Chapters count judges Net-original websitehttp://www.jiuzhang.com/problem/38/TopicsThere is a pair of poker with 2n cards, with,.. 2*n represents each card, a shuffle will divide the cards into two piles, 1,2..N and n+1...2n. Then cross the wash Together: n+1, 1, n+2, 2, ... n, 2n. Ask how many times you can wash back the initial state of poker by shuffling this technique:,... 2n.AnswerTake 1 2 3 4 5 6 For example, after washing for 4 1 5 2 6 3.

2015-08-25 php Force 016 Brother Lian Gaulo PHP Tutorial (2014 14 Chapter list of database chapters)[2014] Brother Lian Gaulo PHP tutorial 14.1.1 Review Database15:58[2014] Brother even Gaulo PHP tutorial 14.1.2 phpmyadmin Use15:59[2014] Brother Lian Gaulo PHP tutorial 14.1.3 php access MySQL17:27[2014] Brother Lian Gaulo PHP tutorial 14.1.4 working with MySQL database in PHP script 117:38[2014] Brother Lian Gaulo PHP tutorial 14.1.6 working with MySQ

Use Workerman\worker;Use Workerman\lib\timer;Require_once '. /.. /web/workerman/autoloader.php ';Require_once '. /.. /web/channel/src/client.php ';Require_once '. /.. /web/channel/src/client.php '$worker = new Worker (' text://0.0.0.0:8989 ');$worker->count = 1;$worker->reloadable = false; Smooth restart$worker->onconnect = function ($con) use ($worker){ foreach ($worker->connections as $connection) { $connection->send ($con->id. ' On-line '); }};Mass notification here only supports

ContentsTen Chararray[]="Hello Word"; One Acout//Print string array contents - intmm[6]={0,1,2,3,4,5}; -cout//Print integer array address the - CharC='a', nn[]={'a','b','C','D','e','F'}; -cout"nn is:"//Print character array contents, but not initialized after N[4], garbled - Char*p1=New Char[Strlen (NN) +1]; +cout"strlen:"//strlen is only useful for string arrays!! How did 12 get here? - strcpy (P1,NN); +cout//as with the print NN, the subsequent uninitialized is still garble

command can be used:$make-jn #其中n是要衍生出的作业数For example, if on a 16-core processor, each processor derives one or two jobs, you can enter the following command:$make-j32 >/dev/nullThe 2.4 module is automatic and independent of the architecture, as root, as long as it runs:% make Module_install 3. Key features and considerations for kernel developmentkernel programming can neither access C libraries nor access standard C header files Kernel programming must use the gun C: inline function, when you

1. Order--Help2. Man commandThe latter more detailedFirst help the middle angle brackets The expression within square brackets (the character between "[" and "]") is optional (the parentheses are removed when the command is written).The expression within the angle brackets (the character between "[" and "]") is an expression that must be replaced (and the parentheses are removed).An ellipsis indicates that the option can be single or multipleSection and description of man document chaptersName:

File name, compressed files using gzip in Windows system, can be decompressed with WinRARPackage Command Tar①windows's winrar also supports decompression of tar.gz filenames② parameter:-j Compression/decompression via BZIP2 support-Z Compression/decompression via GZIP support-P Save the permissions and properties of the original file③ View data contents of tar ' File: Tar-jtv-f/root/etc/tar/bz2④ Unpacking: Tar-JXV-f/root/etc/tar/bz2⑤ only unlocks a single file: Tar-jtv-f/root/etc/tar/bz2 | grep

Seminar Time: 18:30-20:00 Time June 5 (Friday) Beijing time June 6 09:30-11:00 (Saturday a.m.) Seminar Schedule: Free Live Webinar Registration website: Http://t.cn/R2XgMSH, or poke "read the original". Who's speaking guest-Huang Rong teacher. Self-study computer in half a year, and successfully found a job. Reap the benefits of top-tier IT companies in North America. Currently interviewed more than 50 people, has a wealth of interview an

Nine Chapters count judges Net-original websitehttp://www.jiuzhang.com/problem/64/TopicsComputes (a^n)%b, where a, B and N are all 32-bit integers. For example (2^31)%3 = 2.Online testhttp://lintcode.com/zh-cn/problem/fast-power/AnswerFirst we need to know a theorem for the MoD operation:(A * b)% P = (a% p * b% p)% pBy this theorem we can knowOriginal A^n% B1. If n is an odd number can be converted to (a^ (N/2) * a^ (N/2) * a)%b = ((a^ (N/2)%b * a^ (N

voidMain (string[] args) {System.out.print ("Enter A number:"); Scanner input=NewScanner (system.in); for(inti = 10000; I ) {System.out.println ("Pi (" + i + ") =" +COUNTPI (i)); } }}4.27 Public classTest { Public Static BooleanIsleapyear (intN) {return((n% 4 = = 0 n% = 0) | | n 400 = = 0); } Public Static voidMain (string[] args) {intn = 0; for(inti = 2001; I ) { if(Isleapyear (i)) {n++; if(n% 11 = = 0) {System.out.println ("\ n"); } Else{System.out.print (i+ " "); }

browser face questions. Includes DOM operations, BOM operations, event bindings, Ajax, and storage for these categories of topics. 6th Chapter Js-web-api (next)explain the specific application of JS in the browser face questions. Includes DOM operations, BOM operations, event bindings, Ajax, and storage for these categories of topics. 7th Chapter Development EnvironmentDuring the interview process, the interviewer may ask questions about the front-end development environment, such as Ide,git, m

The first chapter: 1. What's in Java?The JDK (Java Development Kit) includesJre (Java Runtime Environment)---------->JVM (Java Virtual machine)Application (JAVAC)Java API and some common jar packages; Java benefits: A. Object-oriented; cross-platform/portability for B.java; Java execution Process: Java source file-------> Compiler-------->.class file--------->JVM explained. Chapter II:Variable:Use a single letter or character to express words. The first thought of char;String n

value of a column MIN () returns the minimum value of a column SUM () returns the value of a column To ask for an average of a column Copy Code code as follows: Select AVG (prod_price) as Avg_pricefrom products; -Count Count the number of rows in a table using count (*) (whether null or not) Use Count (column) to count rows with values for a particular column, ignoring null Sum Use SUM () to return the value of the specified column The above is a smal

transaction, rolls back uncommitted transactions, forces all users to connect, and performs checkpoints to write dirty data to the data file. However, the speed of the shutdown can also be affected by the number of transactions and user connections⑶shutdown Transactional: When the database is closed, the current connection continues, but the new connection is not allowed, and the database is closed once all the current transactions have completed⑷shutdown Abort: Unsafe shutdown mode, which disc

; ID NAME ID Age--------------------------------------------------1 AAA 1 20 3 30 from the above display you can see that the left outer join is based on the table on the left. Generally speaking, the left table is all displayed, and then the right table ID and the left table ID of the same record is "stitching" up, such as the record ID 1. If there is no matching ID, such as T1 in the ID 2 in the T2. There is a null display. Right outer join process just the opposite。

function keyword functionsA recursive function that contains statements that call itself directly or indirectlyInclude,require loading a function library file into a script programUse special pointers in the $this classAccess or operation in class, $thisconst Keyword Class constantsConstruction Method _construct ()destructor Method _destruct ()Static classThe "::" symbol is called a range resolution operation that can be used to access static members, static methods, and constants, and can also

The Book of the first three chapters of the Law of constructionAfter reading the first three chapters of this book, I deeply appreciate the benefits of this book, which is not only suitable for our students, but also suitable for teachers, teaching assistants and so on. This book not only the knowledge points to learn this chapter is concise and clear list out, but also have after-school exercises for the s