lock mail opt run tmp ypcache CVS empty GDM local lo G NIS Preserve spool www# inittab is only used by upstart forThe default runlevel.## ADDING Other CONFIGURATION here would have NO EFFECT on YOUR system.## SYSTEM initialization i S started by/etc/init/rcs.conf## Individual runlevels is started by/etc/init/rc.conf## Ctrl-alt-delete is handled by/etc/init/control-alt-delete.conf## Terminal Gettys is handled by/etc/init/tty.conf and/etc/init/serial.conf,# with configurationinch/etc/sysconfig/in
. After the cursor is stored, the application can scroll or browse the data as needed. Use of Cursors Check the total price of all orders 1 CREATE PROCEDUREprocessorders ()2 BEGIN
3 DECLAREDone BOOLEANDEFAULTFALSE;4 DECLAREOINT;
5 DECLARETDECIMAL(8,2); 6
7 DECLAREOrdernumbersCURSOR #定义一个游标, read out all order_num in orders
8 for
9 SELECTOrder_num fromorders;Ten
One DECLARE CO
Install the MySQL source code in A8 ora8: blog.sina.com.cnsblog_48c95a424100e7eo.html; comment: the system development plan has changed! Discard PostgreSQL! Embrace MySQL! Of course, the premise is that BerkeleyDB is still supported as the MySQL version of the storage engine. MySQL version 5.1.12 has officially removed the BDB from the Database Engine list.
Fedora 8 MySQL source installation notes Source: h
TCP/IP study notes (8)
I,FTP: File Transfer Protocol
1. FTP protocol: two TCP connections are used to transmit a file.(1) control connection:The control connection is usually established on the client server. The control connection always waits for the customer to communicate with the server. The connection sends the command from the client to the server and returns the server's response.(2) Data Connectio
single register in the four registers described in 1th, or a combination of one or two registers and an immediate number in these four registers.6. Indicate the size of the data to be processed:(1). indicated by register name, such as Al represents data as one byte, Ax is two bytes(2). Specify the memory unit length with the operator x ptr, x = Word or byte(3). Push instruction only for word operation7, Div in the Assembly for Division instruction
The divisor has
The offset address can be a single register in the four registers described in 1th. It can also be a combination of one or two registers in these four registers with the number of immediate numbers.6. Indicate the size of the data to be processed:(1). indicated by the register name, such as Al represents the data as a single byte. Ax is two bytes(2). Specify the memory unit length with the operator x ptr. X = Word or byte(3). Push instruction only for word manipulation7, Div in the Assembly for
reduced after removing the label, (2) using the data of the reduced dimension to train the model, (3) for the new data points, the PCA reduced dimension to obtain the dimensionality reduction data, and the model to obtain the predicted value. Note : You should only use the training set data for PCA dimensionality reduction get Map $x^{(i)}\rightarrow z^{(i)}$, and then apply the mapping (PCA-selected principal matrix $u_reduce$) to the validation set and test set
do not use PCA to block ove
following format:netstat [options]Where the-t option represents the TCP protocol, the-U option represents the UDP protocol,-L for listening,-R for routing, and-n for displaying the IP address and port number.such as: View the local listening port-----Netstat-tlunView all network connections on this computer-----netstat-anView the native routing table-----Netstat-rn.(Ten) SetupThe Setup command is used to configure the network, which is characterized by a permanent effect, unlike ifconfig, where
1.string invarianceHere's a picture showing what this code does
12
String s = "abcd";s = s.concat("ef");
2.the difference between the Equals () method, the Hashcode () methodHashcode is designed to improve performance. The difference between the Equals () method and the Hashcode () method is that:
If two objects are equal (equal), then they must have the same hash value.
If two objects have the same hash value, they may not be equal (equal).
3.Hi
1. Connect to the database serverMysql-h host-uroot-pxxxx2. View all librariesshow databases;3. Select LibraryUse library name4. View the table below the libraryShow tables;5. Build a tableCREATE table msg (ID int auto_increment primary key,content varchar ($), pubtime int) charset UTF8;Tell the server your character set: set names gdb/utf8/...;6. Add DataINSERT into MSG (id,content,pubtime) VALUES (' 1 ', ' dd ', ' 2 ');7. Query all dataSELECT * from
container calls Release, for example, the Stack example:
1: void Stack: Push (SmartPointer Similarly, you can use Release to enhance the reliability of your code.
For details about this part, refer to the auto_ptr smart pointer in "C ++ memory management learning notes (3)". The auto_ptr object changes the object owner by assigning values, copying, and reset operations.
2.6 share ownershipFinding or specifying an owner for resources in each program i
the number is not 1 words can not get any dataSelect Rownum,last_nameFrom S_empwhere rownum>0;Select Rownum,last_nameFrom S_emp;I have hundreds of thousands of data address, see is hundreds of thousands of data, must be able to batch queryI would like to provide a sample of data for customer inquiries, but for the time being can not show him specific digital gradesI want to be able to hide these numbers or replace them with * numbers.Data table format: 123 Lane No. 456, Nanjing Road, Room 7890H
, users can choose their own region for the delivery of goods|-users can discount items based on their points of purchase2) RealizationAccording to the first requirement, a product belongs to a commodity group, then a "one-to-many" relationship should be established at this timeDepending on the second requirement, administrators can be grouped, administrator tables, Administrators group tables, permission tables, administrators-Administrators group tables, Administrators groups-permissions table
today's basic tasks:One. The guide to the Music Store project under the http://www.cnblogs.com/haogj/archive/2011/11/23/2246032.html continues to learn, and was completed yesterday at the ASP. NET MVC Music Store-5. Create an edit form from the bracket, the goal today is the ASP. NET MVC Music Store-8. Use Ajax to update your shopping cart. Two. The following points are recorded in the blog: in the developm
deadlock
1. Object mutex: Prevents multiple threads from accessing a condition variable at the same time, using synchronized to declare a block of code or a method that operates on shared data
(1) Synchronizing code blocks: Only one thread can gain access to this code block at any time
Synchronized (
}
(2) Synchronization method: Any time the method can only be executed by one thread
Synchronized
}
2. Interactive synchronization between threads
Wait for notification m
now ?"2. Managers often cannot get rid of the past. They must spend time, energy, and talents to make up for and jump out of yesterday's actions and decisions.3. In any case, we can minimize the work left over from yesterday that cannot produce any more results.4. Yesterday's success will have an endless impact, far beyond the validity period of the success. We must always review "those past successful experiences, systems, norms and plans"5. If any
plan to complete this note in the following order, for example:
Java Program Ape's JavaScript Learning notes (concept)
Java Program Ape's JavaScript Learning notes (2--property copy and inheritance)
Java Program Ape's JavaScript Learning Note (3--this/call/apply)
Java Program Ape's JavaScript Learning Note (4--this/closure/getter/setter)
Java Program Ape's JavaScript Learning Note (
try to obtain the length of the database name, enter:1 ' and Length (database ()) =1 # hint does not exist1 ' and Length (database ()) =2 # hint does not exist1 ' and Length (database ()) =3 # hint does not exist1 ' and Length (database ()) =4 # hint existsSo we know the length of the database name is 4, followed by guessing the database name, in the first character as an example, enter:1 ' and ASCII (substr (databse ()) >97 # The first character has an ASCII value greater than 97 (i.e. lowerca
Dojo learning notes (8. dojo. Event dojo. event. Topic dojo. event. browser)
Module: dojo. Event
I finally got into the learning of the famous dojo event processing system. Before learning, I suggest you first study the relevant knowledge of AOP.
Dojo. event. Connect
Bind the specified method to the method of the specified object
Usage example:
Simple binding 1
Function doonclick1 (){Alert (
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