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Real escape string and PDO [duplicate]
...() and PDOStatement::execute() for statements that will be issued multiple times with different parameter values optimizes the performance of your application by allowing the driver to negotiate client and/or server side caching of the query plan and meta information, and helps to prevent SQL inject...
How to find a Java Memory Leak
...on is idle.
Run the operation suspected of producing a memory leak several times to allow any cache, DB-related initialization to take place.
Run GC and take memory snapshot.
Run the operation again. Depending on the complexity of operation and sizes of data that is processed operation may need to b...
Why are #ifndef and #define used in C++ header files?
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This prevent from the multiple inclusion of same header file multiple time.
#ifndef __COMMON_H__
#define __COMMON_H__
//header file content
#endif
Suppose you have included this header file in multiple files. So first time
__COMMON_H__ is not defined, it will get defined and header file inc...
What does @synchronized() do as a singleton method in objective C?
... that only one thread can be executing that code in the block at any given time.
If you aren't aware of what it does, then your application probably isn't multithreaded, and you probably don't need to use it (especially if the singleton itself isn't thread-safe).
Edit: Adding some more informati...
Protecting executable from reverse engineering?
...all be worked around and or figured out by code analysists given the right time frame.
If you give people a program that they are able to run, then they will also be able to reverse-engineer it given enough time. That is the nature of programs. As soon as the binary is available to someone who wan...
SqlException from Entity Framework - New transaction is not allowed because there are other threads
...LINQ query without thinking about the consequences. This must be the first time appending .ToList() is really useful!
– Marc
Jul 13 '11 at 9:50
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Is JavaScript guaranteed to be single-threaded?
... visible to scripts(*), so that when your inline script, event listener or timeout is entered, you remain completely in control until you return from the end of your block or function.
(*: ignoring the question of whether browsers really implement their JS engines using one OS-thread, or whether ot...
Can a foreign key be NULL and/or duplicate?
...ys, one with the client ID and one with the sales rep ID. However, at the time the record is created, a sales rep is not always assigned (because no one is free to work on it yet), so the client ID is filled in but the sales rep ID might be null. In other words, usually you need the ability to hav...
Release generating .pdb files, why?
... on (they are disabled by default under the "Debug" configuration) can sometimes cause subtle bugs to appear that you wouldn't otherwise catch. When you're doing this debugging, you'll want the PDB symbols.
Customers frequently report edge cases and bugs that only crop up under "ideal" conditions. T...
Wait until a process ends
...SDN page for the method. It also has an overload where you can specify the timeout, so you're not potentially waiting forever.
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