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__attribute__ - C/C++ - 清泛网 - 专注C/C++及内核技术
...int(const char *format,...)
__attribute__((format(printf,1,2)));
void test()
{
myprint("i=%d/n",6);
myprint("i=%s/n",6);
myprint("i=%s/n","abc");
myprint("%s,%d,%d/n",1,2);
}
运行$gcc –Wall –c attribute.c attribute后，输出结果为：
attribute...
How do I pass extra arguments to a Python decorator?
...to reuse decorator and decrease nesting
import functools
def myDecorator(test_func=None,logIt=None):
if not test_func:
return functools.partial(myDecorator, logIt=logIt)
@functools.wraps(test_func)
def f(*args, **kwargs):
if logIt==1:
print 'Logging level 1 ...
JavaScript OR (||) variable assignment explanation
... cannot later do if( true == f ). If an integer was stored in f, then this test will always return false.
– user1115652
Aug 1 '13 at 2:11
9
...
JavaScript Regular Expression Email Validation [duplicate]
...attern =/^\w+([\.-]?\w+)*@\w+([\.-]?\w+)*(\.\w{2,3})+$/;
return pattern.test(str); // returns a boolean
}
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Node.js / Express.js - How does app.router work?
... opportunity to process a request. For example, if you have a file called test.html in your static folder and a route:
app.get('/test.html', function(req, res) {
res.send('Hello from route handler');
});
Which one gets sent to a client requesting http://server/test.html? Whichever middleware ...
Objective-C: Property / instance variable in category
...gt;
static void *MyClassResultKey;
@implementation MyClass
- (NSString *)test {
NSString *result = objc_getAssociatedObject(self, &MyClassResultKey);
if (result == nil) {
// do a lot of stuff
result = ...;
objc_setAssociatedObject(self, &MyClassResultKey, result, OBJC_ASSOC...
WebKit issues with event.layerX and event.layerY
I just noticed that I get tons of deprecated warnings in the latest (canary) build of Chrome.
9 Answers
...
How to assign the output of a Bash command to a variable? [duplicate]
...
In shell you assign to a variable without the dollar-sign:
TEST=`pwd`
echo $TEST
that's better (and can be nested) but is not as portable as the backtics:
TEST=$(pwd)
echo $TEST
Always remember: the dollar-sign is only used when reading a variable.
...
What is a sensible way to layout a Go project [closed]
...uth/
oauth.go # package source
oauth_test.go # test source
Update July 2014: see "Structuring Applications in Go" from Ben Johnson
That article include tips like:
Separate your binary from your application
combining the main.go file and my app...
boost::flat_map and its performance compared to map and unordered_map
...dering of instructions.
3) parameters
The last problem is people usually test for too few variations of the scenario.
A container performance is affected by:
Allocator
size of contained type
cost of implementation of copy operation, assignment operation, move operation, construction operation, o...