the document will only have a part to be updated. Using an atomic update modifier makes this part of the update extremely efficient. The update modifier is a special key that specifies complex update operations, such as resizing, adding or removing keys, or manipulating arrays or inline documents.For example, to record website access, when someone accesses, you need to increase the counter, you can use the update modifier atomically to complete this increase:In PHP, $ represents a variable pref
//Warehouse3ClassDepot {4Privateint capacity;//Capacity of the Warehouse5Privateint size;//Actual number of warehouses67Public Depot (Intcapacity) {8This.capacity =capacity;9This.size = 0;10}1112PublicSynchronizedvoid Produce (IntVal) {13Try{14//Left means "the quantity you want to produce" (it is possible to produce too much, it needs more production)15int left =Val16while (Left > 0) {17//When inventory is full, wait for "consumer" consumer products.18while (size >=capacity)19Wait ();20//Get "A
All-purpose Engine Features of The adodb php database:1. You can standardize the connection and use of various databases in PHP.2. It can help us provide development efficiency in PHP and quickly convert various databases3. relatively simple to use4. Strict writing requirements, case sensitive5. Rich built-in functions
How to configure and use ADODB PHP1. Download the compressed package of the ADODB For PHP class library2. decompress the package to any folder in the website directory.3. Introduc
Atomic, spinlock and mutex Performance ComparisonI am very curious about the performance of different synchronization principles, so I made the following experiments to compare atomic, spinlock, and mutex:1. No Synchronization# Include # Include
Volatile int value = 0;
Int loop (bool inc, int limit ){Std: cout For (int I = 0; I If (inc ){++ Value;} Else {-- Value;}}Return 0;}
Int main (){Auto f = std: asyn
ADODB is a compatible interface for various database applications (APIs. MySQL, PostgreSQL, Interbase, Firebird, Informix, Oracle, MSSQL7, Foxpro, Access, ADO, Sybase, FrontBase, DB2 adodb php database universal engine features:
1. you can standardize the connection and use of various databases in PHP.
2. it can help us provide development efficiency in PHP and quickly convert various databases
3. relatively simple to use
4. strict writing requirements, Case Sensitive
5. rich built-in functions
This article describes the risks and solutions of using the. inc file in php. one of the main issues that need to be paid attention to when using the database is access permissions, that is, exposure of user names and passwords. For convenience in programming, a db. inc file is usually used for storage, such:
The code is as follows:
$ Db_user = 'myuser ';$ Db_pass = 'mypass ';$ Db_host = '2017. 0.0.1 ';
This article mainly introduces the static variable of PHP introduction, has a certain reference value, now share to everyone, the need for friends can refer to
1 static variables within a functionOnly works inside the function, and after each call, the value of the static variable is changed on the basis of the last call. When defined, if the initial value is given, then the statement executes only onceFor example: No matter how many times the GetData () function is called static $c 2 = 0; This
Implementation code for connecting phpadodb to different databases.
The code is as follows:
Include ("adodb/adodb. inc. php"); // contains the adodb class library file$ Conn = NewADOConnection ('seconds s ');$ Conn-> Connect ('localhost', 'root', 'pass', 'mydb'); // Connect to the PostgreSQL database?>
The code is as follows:
Include ("adodb/adodb. inc. php"); // contains the adodb class library fi
BZOJ1047[HAOI2007] the ideal squareTest instructionsThere is a matrix of a*b integers, which asks for a n*n square area, which minimizes the difference between the maximum and minimum values of all the numbers in the region. a,b≤1000,n≤100ExercisesDo 4 times the monotone queue. Using the monotone queue to find the maximum minimum value of row J of line I to row j+n-1 of line I, and then use this to find the maximum minimum value of row J of line I to column i+n-1 j+n-1. The last enumeration of t
READLN (s);
For j:=1 to length (s) do
if s[j]=' Then
begin
T:=copy (S,1,j-1);
Delete (s,1,j);
Break
end;
For j:=1 to length (s) do
if s[j]=' Then
begin
Val (copy (S,1,j-1), q,code);
Delete (s,1,j);
Break
end;
For j:=1 to length (s) do
if s[j]=' Then
begin
Val (copy (S,1,j-1), b,code);
Delete (s,1,j);
Break
end;
G:=copy (S,1,1);
Delete (S,1,2);
X:=copy (S,1,1);
Delete (S,1,2);
Val (S,l,code);
if (q>) and (
timesPush dpl to protect the first address of the data blockPUSH DPHMM1: inc dptr; point to a new dataMovx a, @ DPTR; read this dataMov B, A; saveSetb c; comparison with the maximum valueSubb a, R6JC MM2; the current maximum value is not exceeded, and the current maximum value is keptMOV R6, B; exceeds the current maximum value, update the maximum storage addressMOV R2, DPH; also update the maximum storage addressMOV R3, DPLSJMP MM3MM2: mov a, B; com
(INT [] list){For (INT I = 1; I {Int T = list [I];Int J = I;While (j> 0) (list [J-1]> T )){List [J] = list [J-1];-- J;}List [J] = T;}}}
Public class mainclass{Public static void main (){Int [] iarrary = new int };Insertionsorter II = new insertionsorter ();Ii. Sort (iarrary );For (INT m = 0; m Console. Write ("{0}", iarrary [m]);Console. writeline ();}}}
4. shellsorter)
Using system;
Namespace shellsorter{Public class shellsorter{Public void sort (INT [] list){Int
{Public class InsertionSorter
{Public void Sort (int [] list)
{For (int I = 1; I
{Int t = list [I];
Int j = I;
While (j> 0) (list [J-1]> t ))
{List [j] = list [J-1];
-- J;
}
List [j] = t ;}
}
}
Public class MainClass
{Public static void Main ()
{
Int [] iArrary = new int };
InsertionSorter ii = new InsertionSorter ();
Ii. Sort (iArrary );
For (int m = 0; m
Console. Write ("{0}", iArrary [m]);
Console. WriteLine ();
}}
}
Hill sorting
Hill sorting is to segment the group for insertion sorting.
(endtime-begintime );
22}
23 # endregion
3 insert sorting
1 insert sorting method # region insert sorting method
2 public void SortInsert (int [] list)
3 {
4 for (int I = 1; I 5 {
6 int t = list [I];
7 int j = I;
8 while (j> 0) list [J-1] 9 {
10 list [j] = list [J-1];
11 -- j;
12}
13 list [j] = t;
14}
15}
16 # endregion
4. Hill sorting
1. Hill sort method # region Hill sort method
2 public void SortShell (int [] list)
3 {
4 int inc;
5 for (
.
* Update ()* Save () in the Mongo Shell* Modifier operations+ $ Inc+ $ Set+ $ Unset+ $ Push+ $ Pushall+ $ Addtoset+ $ Pop+ $ Pull+ $ Pullall+ $ RenameO The $ positional OperatorO upserts with ModifiersO pushing a unique value* Checking the outcome of an update request* NotesO object paddingO Blocking* See also
Update ()
Update () replaces the document matching criteria entirely with objnew. If you only want to modify some fields, you shocould use th
CopyCode The Code is as follows: Include ("ADODB/ADODB. Inc. php"); // contains the ADODB class library file
$ Conn = newadoconnection ('Seconds s ');
$ Conn-> connect ('localhost', 'root', 'pass', 'mydb'); // connect to the PostgreSQL database
?>
Copy code The Code is as follows: Include ("ADODB/ADODB. Inc. php"); // contains the ADODB class library file
$ Conn = newadoconnection ('mysql: // root: 1981427
. Traditional MethodsIs to manually generate config. inc. PHP file, the system comes with a config. default. inc. PHP file, you can copy it as config. inc. PHP file, and then edit it. I think you can use the following configuration. For security issues, you can:
/* Server: localhost [1] */
$ I ++;
$ Cfg ['servers'] [$ I] ['host'] = 'localhost ';
$ Cfg ['serv
Console. Write ("{0}", iarrary [m]);
Console. writeline ();
}}
}
Insert sort
Using system;
Namespace insertionsorter
{Public class insertionsorter
{Public void sort (INT [] list)
{For (INT I = 1; I
{Int T = list [I];
Int J = I;
While (j> 0) (list [J-1]> T ))
{List [J] = list [J-1];
-- J;
}
List [J] = T ;}
}
}
Public class mainclass
{Public static void main ()
{
Int [] iarrary = new int };
Insertionsorter II = new insertionsorter ();
Ii. Sort (
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