can also refactor a method in your program, the name of random. For example:
function out (Msg,color) {
if (jslog) Jslog (Msg,color);
}
It's also possible to unify your own definitions, such as:
function Test () {
Out (null, "Red");//null
Out (1/3, "Red");//number
Out (1==2, "Red");//boolean
Out (Test, "Blue");//function
Out ("Hello world!", "Red");//string
}
But usually release when the debug switch is set to: Debug=false, do not need to delete the target program in the debugging code, the ta
Lamp is
LInux,
APache,
MYsql,
PHP's abbreviation. This tutorial will teach you how to install Apache2web server +php (mod_php) +mysql on a Fedora 12 server.
I have tested it correctly and you can use it safely.
1. Foreword
In this tutorial, I use the host name Server1.example.com,ip address is 192.168.0.100. These settings may be different from what you want, so you have to change them in the right place.
2 installation MySQL5
Install MySQL wi
have a thread protect a piece of code and avoid other threads executing the code. For different key code segments in the program, we should use different semaphores separately. It is safest to avoid competition between threads by creating all the mutex objects that are needed before the application is programmed to execute multithreading.
The code in Listing 12-1 uses self as the mutex semaphore to implement the current object's synchronization of i
Now mention the site Exchange links, many people feel miserable, is not very difficult, difficult to the sky. Because everyone has a scale in mind, hope that the balance towards their side tilt a little, take advantage of a little. Finally exchange to their own hope of the link, improve their site weight is expected to see, that the bottom of our hearts that what it looks like? Today I will share with you about the exchange of Web links need to learn the 12
MDaemon 12.X Special Considerations
1, the Windows 2000 operating system is no longer supported. The operating systems supported by MDaemon 12.0 include Windows 2008, 2003, 7, XP, or Vista.
2, now requires the password is at least 4 characters in length. You do not need to change the existing password, but your password must be at least 4 characters in length the next time you change your password.
3. If you want to seamlessly sync the content that
We often use Excel to make tables, processing data, how to improve efficiency? Here we will organize 12 of Excel common tips.
First, in Excel to calculate the results of multiple columns of data, you can in a column next to show its every step of the calculation, used to track the balance of bank account changes is absolutely straightforward.
As shown in figure I, assuming that the C2 contains the original account balance, A3 is revenue, B3 is an ex
Original: My MySQL learning experience (12)My MySQL Learning experience (12)My MySQL learning experience (a)My MySQL learning Experience (ii)My MySQL learning Experience (iii)My MySQL learning experience (iv)My MySQL learning experience (v)My MySQL learning experience (vi)My MySQL learning experience (vii)My MySQL learning experience (eight)My MySQL learning experience (ix)My MySQL learning experience (10)M
12. Check the average score of the course with at least 5 students enrolled in the score table and begin with 3.Select cno,Count(CNO),avgfromgroup by has Count(CNO)>=5 and substr (CNO,0,1)=' 3'13, the query score is greater than 70, less than 90 of the SNO column.Select from where degree>14. Sname, CNO and degree columns for all students are queried.Select from15. Check the Sno,cname and degree columns of all students . Select from16. Check the sn
ollydbg using notes (12)ReferencesBook: "Encryption and decryption"Video: Small Turtle decryption Series videoDemo sample program: Http://pan.baidu.com/s/1eQiV6aI
After the program is installed, the open program can see the registration interface in about. You can start with the input API.
Right--Find the call between all modules, search for getwindowtexta (you can search directly by typing these letters), select the call found, right---"set
)VALUES (seq1.nextval,302, ' Tom ', 2002); --rowidSelect Rowid,bh,id,namefrom EMP2; SELECT * FROM EMP2where rowid= ' Aaasovaaeaaaakoaab ';--Create an attempt toCREATE View My_employees asSelect Employee_id,first_name,last_name,salaryFrom Employeeswhere manager_id=122with Read only; --users can only from the attempt to queryDelete attempts toDrop View my_employees; Materialization attempts toThe following things can be done on materialized attempts:Creating an index on materialized attempts;Creat
basic problems: how to describe a record, you can easily get its properties; How to store a record in a block makes it easy to get to.A record with a variable-length property usually has two parts: the initial part of the fixed length, and then the variable-length part immediately following it. The fixed-length portion is expressed in such a format (offset, length) that the offset indicates the starting position of the data, and the length is the length of the variable-length part. The variable
multiple table join is suitable for creating an index;
The amount of table data to be queried is very large, and most of the queries get the 2%~4% of the total record amount of the result set;
Too many indexes are not always more beneficial, too many indexes do not mean faster queries, and each DML operation on the table with indexes means that the index must be updated, and too many indexes will cause the Oracle server to spend more time on the update of the index after DML operati
there is an ORM, to achieve the same function above, the code is as follows:Import sqlalchemyfrom sqlalchemy import create_enginefrom sqlalchemy.ext.declarative import Declarative_basefrom SQLAlchemy import Column, Integer, String engine = Create_engine ("Mysql+pymysql://root:[email protected]/testdb", Encoding= ' Utf-8 ', echo=true) Base = Declarative_base () #生成orm基类 class User (base): __tablename__ = ' user ' #表名 id = column (Integer, primary_key=tru
The Short date format "yyyy/m/d" of the Win7 system that produces the reason is used with the DATETIMETOSTR (now) function when inserting the current date into the date format field in Sqlit.This value can sometimes become a 1899-12-30 in a SQLite table. To resolve this issue, set the program's time format in the Create event of the main form, and set theApplication.updateformatsettings: = False; causes the program to be unaffected by the system time
mysql-Optimization Class Learning -12-20170627-mysql AffairsMyrocks also supports transactionsInnodb_flush_log_at_trx_commit = 1Sync_binlog = 1So-called double 1, to ensure the durability of the data"Administrator" Ta-gakkiFlush (Redo) Log"Administrator" Ta-gakkiWhen"Administrator" Ta-gakkiAt Trx Commitmysql-Optimization Class Learning -12-20170627-mysql Affairs
11i-12 Gather Schema Statistics fails with Ora-20001 errors after 11G database Upgrade (document ID 781813.1)
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grep-e
12. Search for a fixed match stringFgrep is used to search for a fixed-style string in a file or file list. function with Grep-f. A common usage of fgrep is to pass a file containing a style to it:
$ sudo fgrep-f file_full_of_patterns.txt file_to_search.txt
This is just the beginning of the grep command, and you may have noticed that it is simply too useful to implement a variety of requirements. In addition to this one-line
Original: MySQL learning note (12) TriggerLearning content:1. Trigger:What is a trigger? When can we use triggers?Triggers are used to listen for changes in a table and trigger an action when the table changes. Marshal says two tables are interrelated, and when we operate on one of the tables, and the data in the other table needs to do something, we need to create a trigger to listen to any change in the table, and when the data in one of the tables
The copying function should ensure that all member variables within the object and all base class components are copied.Do not attempt to implement another copying function with one of the copying functions. Common functions should be put into the third function and called together by two coping functions. If you find that your copy constructor and the copy assignment operator have similar code, the practice of eliminating duplicate code is to create a new member function to call both. Such func
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