billion dollar mistake

Article backgroundQWQ is now the National Day holiday.Qingdao Qing bei bathhouse-ing ....Hudor (SHA) Smart (BI) error after two days of simulationSo determined to get rid of these mistakes and must not be repeated especially in the examination Room!Article descriptionThis article is not updated regularly, mainly to record Oi some of the low-level errors can not be committedArticle text1. The range of data in the topic is too large don't forget to open longlong!"R" "W" in 2.freopen don't hit the

Extundelete-0.2.4[[email protected] E xtundelete-0.2.4]#./configure--prefix=/usr/local/extundelete [[email protected] extundelete-0.2.4]# make Make install 4. Test whether the installation is successful;[Email protected] extundelete-0.2.4]# Cd/usr/local/extundelete/bin[[email protected] bin]#./extundelete- Vextundelete version 0.2.4LIBEXT2FS version 1.41.12Processor is little endian.5. Scan the LVM partition for accidental deletion of files;[Email protected] bin]#/usr/local/extundelete/bin/ext

In the project I was involved in, the impact is more profound is the teaching system for a college, this system provides a bulk entry of students function, you can write a text document to the student list in bulk into the database. In the development of all the use of normal, after the use of teachers to report the problem, upload text documents generated garbled.Learned that the problem after I tried on the local machine a few times are normal, so to come to the problem of the document to test

, resulting in some stored procedures, functions and other execution will be problematic.Extended test:Sql> Show UserUSER is "JOHN"VIEW:Sql> Select Owner,object_name,object_type from dba_objects where object_name= ' JOHN ';OWNER object_name object_type---------- ------------------------------ --------------------------------------John John VIEWSql> exec p1;PL/SQL procedure successfully completed.sql> exec john.p1;BEGIN John.p1; END;*ERROR at line 1:Ora-06550:line 1, Column 12:Pls-00302:component

a pair of pairs, a lot of shoes he was not comfortable wearing. This picture, really very bleak, according to the old words is "a lifetime of special guilt scenes."I once thought that aging should find a person who knows the clothes to help him. However, in this discussion, he said: " only the founders to do the product manager, to be able to all the links to be serious, harsh to the point." Professionals can provide professional advice and ultimately decide who is responsible for the company.

Today the computer changed the system, installed the JDK, accidentally put the directory under the JRE to delete the ...Reinstall, but just don't play out the JRE installation ... Tapping Java on the command line says the directory for the JRE could not be found.Since a tangle for a long time, the last way to find is: Find a more than you installed JSK version of the installation of the line. If you are struggling to install the current version, then sorry ... To re-install the system. Think of

A small mistake that is easy to ignore. Have you ever made it? Modify the foreach array value /** * Note the differences in foreach values */ $ Arr = array (1, 2, 4 ); Echo "foreach traverses array 1:"; Foreach ($ arr as $ val ){ $ Val = $ val * 2; } Var_dump ($ arr ); Echo"Foreach traverses array 2:"; Foreach ($ arr as $ val ){ $

How to delete the root user or root permission in MySQL by mistake: bitsCN.com Some time ago, I accidentally deleted the Root user of Mysql. Unfortunately, I couldn't log on to Mysql. I 've been looking for a solution. I also read what I said on the Internet: 1. first kill the mysqlld process, add the -- skip-grant-tables parameter to open mysqlld, insert the root user 2. find the default user configuration information created when installing mysql i

to patch, has been hit to the end of the test, the heart is still not practical down, really torture people, although this panic and fear may not appear, if the heart of all done things have a bottom words. This time the program list can help the programmer to the bottom of the mind, because the things are listed there, look at the name and look at the uncomfortable look two times think the parameters of the package is somewhat redundant, if the type or array pass will be more extensible. See t

not just data security, as some traditionally think, because the security operations themselves affect the behavior of the data. It's foolish to have an ECB encryption on a video stream, and encryption should be done immediately after the video is encoded, rather than being forced to do it in an unsuspecting, yet sensitive, middle box, and I always see that you're trying. Video is just an example of a wide range of examples, full blown. How foolish it is to use the legacy IPSec to encrypt the I

January 21 1. Brief description of the status before the problem: 40 GB disk, divided into three areas:==================================Primary partition 1 FAT32 4GPrimary partition 2 FAT32 1gExpansion zone 3 35g------ Logical partition 3.1 FAT32 35g==================================The error message returned when the partition 3.1 is deleted by mistake, with 33 GB of files. 2., WINXP management tool, accidental deletion of logical partitions xx 3

Run the bcdedit command on Windows 7 and delete the startup of ubuntu 10.04 by mistake. As a result, UBUNTU cannot be started after Windows 7 is restarted. The solution is as follows: It turns out that Windows XP + ubuntu (wubi installation) is replaced with Windows 7. Considering the Ubuntu boot after the system is changed, copy the drive C "wubildr" and "wubildr. MBR" for backup. After entering Windows 7, restore the above two files to the C r

="+NumberUtil.toDigital(ids)+";\n");bw.append(t+";\n");}/** sql语句后面都要加 ; ，因为原来没有，不加的话，在导入到数据库时，出错*/}br.close();}bw.flush();bw.close();}publicstaticvoidmain(String[] args)throwsException{long sd = System.currentTimeMillis();ReloadWorker w =newReloadWorker();ListnewArrayListorgs.add("C:/Users/IBM_ADMIN/Desktop/000015.txt");orgs.add("C:/Users/IBM_ADMIN/Desktop/000016.txt");orgs.add("C:/Users/IBM_ADMIN/Desktop/000017.txt");orgs.add("C:/Users/IBM_ADMIN/Desktop/000018.txt");orgs.add("C:/Users/IBM_ADMI

A small mistake in C language conversion: C language conversion Today, my school girl asked a question. There are the following programs # Include Void main (){ Int m = 0256, n = 256; Printf ("% o", m, n ); } The output result of the program running is A, 0256 0400 B, 0256 256 C, 256 400 I thought the answer should be 400,400. Later, my school sister said If 0 is added before m, it is the octal digit by default. n or 10 is 256, so the an

? This person began not good, and then looked up to see leader, my eyes incomparably resentment ...Inside the Roar: "I'm not mistaken, I'm just a web front-end engineer, not a manager, not a leader ..."However, another voice said: "Since the preparation of the work is not sufficient, it can only be done by themselves, complaining more, can only let leader think he is unbearable." ”After boil in the heart, only honestly to collect as much information as possible about the limited project.I b

cannot be copied directly with =:ImportCopya= [1, 2, 3, 4, ['a','b']]#Original Objectb= A#assignment, a reference to a passing objectc = Copy.copy (a)#object Copy, shallow copyD = Copy.deepcopy (a)#object Copy, deep copyA.append (5)#Modify Object AA[4].append ('C')#Modify the [' A ', ' B '] Array object in Object aPrint 'A =', aPrint 'B =', bPrint 'C =', CPrint 'd =', D output result: a= [1, 2, 3, 4, ['a','b','C'], 5]b= [1, 2, 3, 4, ['a','b','C'], 5]c= [1, 2, 3, 4, ['a','b','C']]d= [1, 2, 3, 4,

Xampp suddenly made a mistake.

phpMyAdmin the recovery process after deleting the table by mistake Say today do not know is convulsions or lost soul, when using phpMyAdmin Delete test data, unexpectedly the entire table was deleted: When the program runs out of error, the entire table is not there, and there is no backup! This egg hurts, this is production server, the data inside can not be lost ah! The server is Linux, I am not very familiar with, I do not know where MySQL ins

Error message:Reported description Resource Path location Type Java compiler level does not match the version of the installed Java project FAC ET. This problem occurs because the JDK build version of Eclipse/myeclipse is inconsistent with the problematic JDK compilation version of the project!Tools/Materials Eclipse/myeclipse Baidu Experience: jingyan.baidu.comMethod/Step 1Set up the JDK first, need to determine the project, Eclipse/myeclipse, the system is using the same

step, scan lost files, after the end of the scan, the software to the left will display the found directory, and according to ordinary files directory, video, images, text, compressed packets and other categories, the right window is the file details, select your important files, right click on the save to your disk on it.Follow the steps above to recover deleted files from your phone, so you can avoid losing files. In addition, you can also restore hard disk format data, in particular, can ref