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C++ Dynamic Shared Library on Linux
...to perform static linkage */
virtual void DoSomething();
private:
int x;
};
#endif
myclass.cc
#include "myclass.h"
#include <iostream>
using namespace std;
extern "C" MyClass* create_object()
{
return new MyClass;
}
extern "C" void destroy_object( MyClass* object )
{
delete obj...
How to handle Objective-C protocols that contain properties?
...
Here's an example of mine that works perfectly, the protocol definition first of all:
@class ExampleClass;
@protocol ExampleProtocol
@required
// Properties
@property (nonatomic, retain) ExampleClass *item;
@end
Below is a workin...
What is code coverage and how do YOU measure it?
... coverage is a measurement of how many lines/blocks/arcs of your code are executed while the automated tests are running.
Code coverage is collected by using a specialized tool to instrument the binaries to add tracing calls and run a full set of automated tests against the instrumented product. A ...
JavaScript variables declare outside or inside loop?
...pt or ActionScript.
var is a directive for the parser, and not a command executed at run-time. If a particular identifier has been declared var once or more anywhere in a function body(*), then all use of that identifier in the block will be referring to the local variable. It makes no difference w...
Replace one character with another in Bash
...
Use inline shell string replacement. Example:
foo=" "
# replace first blank only
bar=${foo/ /.}
# replace all blanks
bar=${foo// /.}
See http://tldp.org/LDP/abs/html/string-manipulation.html for more details.
...
How do I make an asynchronous GET request in PHP?
...t_contents will do what you want
$output = file_get_contents('http://www.example.com/');
echo $output;
Edit: One way to fire off a GET request and return immediately.
Quoted from http://petewarden.typepad.com/searchbrowser/2008/06/how-to-post-an.html
function curl_post_async($url, $params)
{
...
What is the difference between Trap and Interrupt?
...
A trap is an exception in a user process. It's caused by division by zero or invalid memory access. It's also the usual way to invoke a kernel routine (a system call) because those run with a higher priority than user code. Handling is syn...
Remove an element from a Bash array
...n working with strings
done
Caveat
This technique actually removes prefixes matching $delete from the elements, not necessarily whole elements.
Update
To really remove an exact item, you need to walk through the array, comparing the target to each element, and using unset to delete an exact mat...
How to escape a pipe char in a code statement in a markdown table?
...ant to build a table containing pieces of code in Markdown. It works fine except when I put a pipe char (i.e. | ) between the backtick (i.e. ` ) chars.
...
Multiple Updates in MySQL
...'s possible - you can use INSERT ... ON DUPLICATE KEY UPDATE.
Using your example:
INSERT INTO table (id,Col1,Col2) VALUES (1,1,1),(2,2,3),(3,9,3),(4,10,12)
ON DUPLICATE KEY UPDATE Col1=VALUES(Col1),Col2=VALUES(Col2);
shar...