大约有 13,330 项符合查询结果(耗时:0.0301秒) [XML]
Naming convention for unique constraint
...primary key and foreign key have commonly used and obvious conventions ( PK_Table and FK_Table_ReferencedTable , respectively). The IX_Table_Column naming for indexes is also fairly standard.
...
Creating your own header file in C
...
foo.h
#ifndef FOO_H_ /* Include guard */
#define FOO_H_
int foo(int x); /* An example function declaration */
#endif // FOO_H_
foo.c
#include "foo.h" /* Include the header (not strictly necessary here) */
int foo(int x) /* Functi...
Python memory usage of numpy arrays
...
b.__sizeof__() is equivalent to sys.getsizeof(b)
– palash
Feb 27 at 7:02
1
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How to install therubyracer gem on 10.10 Yosemite?
...all
bundle exec rake clean build binary
gem install pkg/libv8-3.16.14.3-x86_64-darwin-12.gem #note that libv8 version may change, so tab through files in pkg/, also remember to use the one with version specified
then just bundle your project gems
this is the only way it worked for me on 10.10 (ru...
Android: View.setID(int id) programmatically - how to avoid ID conflicts?
...same id number in the same hierarchy, then a call to findViewById([repeated_id]) would return the first view set with that one repeated id. That's what I meant.
– kaneda
Jun 19 '13 at 23:33
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Primary key or Unique index?
.... Example:
CREATE TABLE table1 (foo int, bar int);
CREATE UNIQUE INDEX ux_table1_foo ON table1(foo); -- Create unique index on foo.
INSERT INTO table1 (foo, bar) VALUES (1, 2); -- OK
INSERT INTO table1 (foo, bar) VALUES (2, 2); -- OK
INSERT INTO table1 (foo, bar) VALUES (3, 1); -- OK
INSERT INTO...
Simplest two-way encryption using PHP
...
Edited:
You should really be using openssl_encrypt() & openssl_decrypt()
As Scott says, Mcrypt is not a good idea as it has not been updated since 2007.
There is even an RFC to remove Mcrypt from PHP - https://wiki.php.net/rfc/mcrypt-viking-funeral
...
In PHP, can you instantiate an object and call a method on the same line?
...So, if you declared a class like this :
class Test {
public function __construct($param) {
$this->_var = $param;
}
public function myMethod() {
return $this->_var * 2;
}
protected $_var;
}
You can then declare a function that returns an instance of that ...
C++ Dynamic Shared Library on Linux
...
myclass.h
#ifndef __MYCLASS_H__
#define __MYCLASS_H__
class MyClass
{
public:
MyClass();
/* use virtual otherwise linker will try to perform static linkage */
virtual void DoSomething();
private:
int x;
};
#endif
myclass.cc
#inc...
How to get object length [duplicate]
...ize method, as well as a toArray method, which may get you what you need.
_.size({one : 1, two : 2, three : 3});
=> 3
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