Preface: I recently spent time on my own course design program, so I have never showed up on csdn. The remaining time is spent on DirectX programming. Have you seen my recently uploaded GIF dynamic images? These are the results of my recent DirectX learning. For more information, see:
Of course, I still read ultimate game programming with dirextx. This book is written by Allen Sherrod. The author is 28 years o
accessFirst step: Connect the 9-8-61 font, after the standard AVL rotation:Step Two: 9-4-10 zigzag standard AVL after rotationThe third step: only the parent node, no grandfather, the direct rotation of the parent node can be3) 1-node accessFirst step: 1-2-31 font, after standard AVL rotationStep Two: 1-9 only parent node, rotate parent node directly4) 5-node accessFirst step: 5-6-81 glyphs, after dimensioning AVL rotation:Step Two: 5-4-31 font, standard AVL after rotationStep three: 5-2-9 zigz
Allen Visual Studio batch automated code operation tools
The Allen toolbox.
The Allen toolbox is a multi-file batch processing plug-in. It aims to improve development efficiency, reduce standardized project code audit, and shorten the developer's project development cycle.Name: Allen Visual Studio, a batch automated
futurequestion: A lot of software engineers who have worked for 2-3 years have talked about career planning as a way of looking to the architect, what advice can I give these growing engineers? How can you become an excellent architect?Answer: In fact, I do not know how to give some effective and specific advice. I don't think an architect is a job or a responsibility, but more like a way of thinking. In fact, as long as open horizons, and constantly absorb and pay attention to the development
C #3.0 in my eyes
Written by Allen Lee
Origin
Every time a new technology is released, we can always feel two completely different emotions: fear and resistance, and with such emotions, "C #2.0 is quite useful, why is it so complicated in C #3.0? "Or" I am still using C #1.0? "And other words; the other is excitement and hug. With such emotions, there are also such things:" It turns out that this problem can be so simple in C #3.0! .
Recently, I gav
1. The vision must at least be realistic, and ultimately it must be achieved through practical work.
An empty vision may have no benefit and feels like a lie. If there are too many lies, there will be no credibility. (N's mail)
2. Importance of
I read a book about gender and gender this week. In fact, this book has been downloaded from the plug-in for a long time. I just didn't think about it .... just this week I want to read a book, so I went to read it. There are not many of them, but
required.
Wikipedia search
Best practices for the search box:
The search box must be available on all pages, not the homepage.
The search box must be long enough (such as Google's) for users to conveniently view and modify.
The search box must be intelligent. When searching, users can provide similar "common search terms" for their reference. In addition, when you enter a word, you can directly provide some "recommendation results" below 」. The search on the Apple official website is a goo
', ' while you ', 'laughing')Certificate ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Note: to learn more about these data structures, enter python in ubuntu, and then enter help (tuple.
Take tuple as an example:
>>> a=tuple()>>> a()>>> a=tuple('hahah')>>> a('h', 'a', 'h', 'a', 'h')>>> b=a+a>>> b('h', 'a', 'h', 'a', 'h', 'h', 'a', 'h', 'a', 'h')>>> for i in a: prin
The following materials are from Baidu Baike
An Kay the best way to predict the future is to invent it. The best way to predict the future is to create it!
-- Alan Kay, inventor of Smalltalk
"The best way to predict the future is to create it." This is a famous saying by the talented Master Alan Kai. He is one of the inventors of the Smalltalk object-oriented programming environment language, he is also one of the founders of object-oriented programming ideas. He is also the earliest thinker of
CENTOS7 system compiled and installed MySQL or Mariab can not start the service errorThe error is as follows:Job for Mysqld.service failed because the control process exited with error code. See "Systemctl Status Mysqld.service" and "Journalctl-xe" for details.Workaround:Depending on the prompts, use Systemctl status Mysqld.service and Journalctl-xe to see why the service failed to start[[Email protected] ~] #systemctl status Mysqld.service?. Mysqld.service-sysv:mysql database server.Loaded:load
Inner Connection-INNER join
The INNER JOIN creates a new result table based on the join predicate combining the column values of the two tables (table1 and table2).
The query compares each row in table1 with each row in table2 to find matching pairs for all rows that satisfy the join predicate.
When the join predicate is satisfied, the column values for each matching pair of rows A and B are merged into one result row.
INNER JOIN is the most common type of connection and is the default connectio
, search is meaningful. In particular, like Wikipedia, which has a large number of different areas of content of the site, "search" function is necessary.
Wikipedia's Search
Best Practices for the search box handy:
The search box has to be on all pages, not just the home page.
The search box is long enough (like Google's) to make it easy for users to view and modify.
Search box to be smart. Users can provide a similar "common search term" for reference when searching. In additio
composite index. The composite index sorts the values of multiple fields based on the column sequence when the index is created. As follows:
Create table people (id int unsigned not null auto_increment primary key comment 'Primary key id', last_name varchar (20) not null default '''comment' surname ', first_name varchar (20) not null default ''comment' name', birthday date not null default '1970-01-01 'comment' birthdate ', gender tinyint unsigned not null default 3 comment' gender: 1 male, 2 f
about the lowest paid employees in the company SELECT * from EMP E WHERE e.sal=( SELECTMIN(sal) from EMP);example Two, query out all employee information with lower base pay than Allen-- Find out all employee information with lower base pay than Allen SELECT * from EMP E WHERE e.salSELECT sal from emp WHERE ename='ALLEN');Example Iii. query all emplo
the company SELECT * fromEMP EWHEREE.sal=(SELECT MIN(SAL) fromEMP);example Two,Find out all employee information with lower base pay than Allen--Find out all employee information for lower base pay than Allen SELECT * fromEMP EWHEREE.sal(SELECTSal fromEmpWHEREEname=' ALLEN ');example Three,Query all employee information for base pay higher than the company's a
Dosage 4Drwxrwxr-x. 3 Allen Gentoo 4096 September 3 20:39 123/usr/test/123:Total Dosage 4Drwxrwxr-x. 3 Allen Gentoo 4096 September 3 20:39 456/usr/test/123/456:Total Dosage 4Drwxrwxr-x. 2 Allen Gentoo 4096 September 3 20:39 789/usr/test/123/456/789:Total dosage 0--reference the group in which the specified file or directory belongs to the same group as the refer
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