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Why is the last $ a value 0 in the recursion below? Isn't it 1? PHPcode lt ;? PhpechoTest (); functionTest () {static $ a0; here is the 4th line echo $. lt; br gt; $ a ++; if ($ a lt; 2) {Test () ;}about the recursion below, why is the last $ a value 0? Isn't it 1? PHP code '; $ A ++; if ($ a Why is the last $ a value 0 in the above recursion? Is

Why does while (0) wonderful? Because it's really good, and it's pretty good to implement in the Linux kernel, let's look at the relevant code in the kernel:#define DB_ERROR (FMT, ...) do { fprintf (stderr, "(Error):"); fprintf (stderr, FMT, # #__VA_ARGS__); } while (0)This is just a normal output of debugging information, some people will think, you this is not superfluous it? Is it possible

, this is because the kernel code uses do{}while (0), this structure can ensure that no matter where it can be run correctly, this is the best place to use it, or sometimes debug the program, the only debug statements written in the fact that it is not printed is actually very normal things , I do not know when you write code, have encountered. I've met it anyway. Later, this method is used to locate the wr

Pctools9.0. Run the PCT90 directory of De.exe, first into the "Options" menu, select the "Configuration" (Configuration) command, press the "space" key to remove readonly (read-only) front of the Check (Tab key switch), after the save exit. Then select and execute the drive (drive) in the main menu "select", and in the "DriveType" (drive Type) item, select Physical (physical) and press the "tab" key to switch to the "drives" Item and select " Harddi

to interact with desktop users. The Alertservice service is "started" in Service Manager, and an icon flashes in the taskbar: Clicking the icon displays the following window, prompting a program (Alertservice) to display the information and whether it needs to be browsed: Try clicking "View the Message", will display the following image interface (in fact, this interface I can not from the current desktop operation screenshot, is through virtual PC screenshot, the reason to continue re

the special version of NT 5.0. 1996.10 Microsoft announces that NT support on PowerPC will be canceled, leaving only Alpha and x86 as the only remaining option. 1997.9 Microsoft Corporation has the first beta version of NT 5.0 in the PDC. 1998.6 Windows 98 released. The latest version of Windows based on the MS-DOS kernel has IE 4 built in. 1999.4 Windows 3 Beta release. 1999.11 Windows Release Candidate 3 (RC3) was released in the United States. 2000.2.17 the release date of the final version

Tags: style blog http color os io using AR strongOriginal: 0. SQL Server Monitoring ChecklistThe monitoring of database servers can be broadly divided into two categories:(1) Status monitoring: Is the database server running in a healthy way?(2) Performance monitoring: Healthy operation at the same time, there is no performance problems? Could it be quicker?a . Server1. Status Monitoring(1) is the server accessible?(2) is the database service enabled

Directory structure: Hadoop cluster (CDH4) practices (0) preface Hadoop cluster (CDH4) Practices (1) Hadoop (HDFS) Build Hadoop cluster (CDH4) practices (2) build Hadoop cluster (CDH4) using HBaseZookeeper (3) Build Hadoop cluster (CHD4) using Hive (4) Build Hadoop cluster (CHD4) using Oozie (5) Sqoop Security Directory structure: Hadoop cluster (CDH4) practices (0) preface Hadoop cluster (CDH4) Practices (

Bkjia.com exclusive Article] Crossday Discuz! Board forum system Discuz! Is an efficient forum solution built using PHP, MySQL, and other types of databases. As a commercial software product, Discuz! It has a good reputation in terms of code quality, operation efficiency, load capacity, security level, functional controllability, and permission rigor. For webmasters, use Discuz! All of them are able to build a community forum platform with excellent performance, comprehensive functions, security

mov [ebp + var_8], edx . Text: BF89ED35 mov [ebp + FileHandle], eax; filehandle Save the OptionalHeader address from here . Text: BF89ED38 jbe short loc_BF89ED50; run the unsigned comparison. . Text: BF89ED3A . Text: BF89ED3A loc_BF89ED3A:; code xref: ReadLayoutFile (x, x)-A23j . Text: BF89ED3A push 6 . Text: BF89ED3C mov edi, offset a_data; ". data"; jump here for comparison, with little impact on the program process . Text: BF89ED41 mov esi, eax .

today, when using Python to get a date, use the date.strftime ('%y.%m.%d. %h%i ') to format the obtained date if the month is less than 10, a leading 0 appears. gets the date format such as: 2017.03.24.0510 so there will be a 0 in front of the month 3, but at this point we do not want this 0, so Baidu a bit, found are using%-d, but in the Pycharm

Exit (0) and exit (1), return differenceExit (0): Run the program normally and exit the program;Exit (1): Abnormal operation results in exiting the program;Return (): Returns a function that, if in the main function, exits the function and returns a value.Detailed said:1. Return returns the function value, which is the keyword; exit is a function.2. Return is a l

Mysql_num_row () is always 0 ?????? Lt ;? Php nbsp; $ reback = 0; nbsp; $ name = $ _ GET [ quot; name quot;]; nbsp; $ password = $ _ GET [ quot; passwor mysql_num_row () is always 0 ?????? $ Reback = 0; $ Name = $ _ GET ["name"]; $ Password = $ _ GET ["password"]; $ Conn = mysql_connect ("localhost", "root ","")

Under Windows, run php-cgi error as follows: D:\php>php-cgi.exe-b 127.0.0.1:9000-c php.ini PHP warning:php startup:in Unknown on line 0 Warning: PHP startup:in Unknown on line 0 PHP warning:php startup:in Unknown on line 0 Warning: PHP startup:in Unknown on line 0