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Realistic usage of the C99 'restrict' keyword?
...ly thing that accesses the underlying object. It eliminates the potential for pointer aliasing, enabling better optimization by the compiler.
For instance, suppose I have a machine with specialized instructions that can multiply vectors of numbers in memory, and I have the following code:
void Mu...
How to duplicate sys.stdout to a log file?
...
Since you're comfortable spawning external processes from your code, you could use tee itself. I don't know of any Unix system calls that do exactly what tee does.
# Note this version was written circa Python 2.6, see below for
# an update...
Symfony 2 EntityManager injection in service
...
For modern reference, in Symfony 2.4+, you cannot name the arguments for the Constructor Injection method anymore. According to the documentation You would pass in:
services:
test.common.userservice:
class: Tes...
Getter and Setter?
... the direct link to the right part of the page: php.net/manual/en/… (+1 for a correct answer)
– Computerish
Dec 18 '10 at 15:41
28
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How does _gaq.push(['_trackPageLoadTime']) work?
...to being an opt-out feature.)
_setSiteSpeedSampleRate is the new function for setting the sample rate on this feature; its default value is 1 (as in 1%). To opt out of using this the Site Speed feature, you have to pass a 0 to this function:
_gaq.push(["_setSiteSpeedSampleRate", 0]);
From the ...
Adding a Method to an Existing Object Instance
...dule>
AttributeError: A instance has no attribute 'barFighters'
More information can be found by reading about descriptors and metaclass programming.
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Casting vs using the 'as' keyword in the CLR
... it's worth using which.
Don't do this:
// Bad code - checks type twice for no reason
if (randomObject is TargetType)
{
TargetType foo = (TargetType) randomObject;
// Do something with foo
}
Not only is this checking twice, but it may be checking different things, if randomObject is a f...
Python list subtraction operation
...
Use a list comprehension:
[item for item in x if item not in y]
If you want to use the - infix syntax, you can just do:
class MyList(list):
def __init__(self, *args):
super(MyList, self).__init__(args)
def __sub__(self, other):
r...
How do I check if an object has a specific property in JavaScript?
...give you completely misleading results.
It depends on what you're looking for. If you want to know if an object physically contains a property (and it is not coming from somewhere up on the prototype chain) then object.hasOwnProperty is the way to go. All modern browsers support it. (It was missing...
When to use in vs ref vs out
...he difference between the ref and out keywords (that has been asked before ) and the best explanation seems to be that ref == in and out , what are some (hypothetical or code) examples where I should always use out and not ref .
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