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not None test in Python [duplicate]
...r of the latter two, since val could potentially be of a type that defines __eq__() to return true when passed None.
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Get name of caller function in PHP?
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See debug_backtrace - this can trace your call stack all the way to the top.
Here's how you'd get your caller:
$trace = debug_backtrace();
$caller = $trace[1];
echo "Called by {$caller['function']}";
if (isset($caller['class']))
...
What is Bit Masking?
...esult: 00000101b
Masking is implemented using AND, so in C we get:
uint8_t stuff(...) {
uint8_t mask = 0x0f; // 00001111b
uint8_t value = 0x55; // 01010101b
return mask & value;
}
Here is a fairly common use-case: Extracting individual bytes from a larger word. We define the high-...
What tools are there for functional programming in C?
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FFCALL lets you build closures in C -- callback = alloc_callback(&function, data) returns a function pointer such that callback(arg1, ...) is equivalent to calling function(data, arg1, ...). You will have to handle garbage collection manually, though.
Relatedly, blocks have...
Get the first element of each tuple in a list in Python [duplicate]
...
Use a list comprehension:
res_list = [x[0] for x in rows]
Below is a demonstration:
>>> rows = [(1, 2), (3, 4), (5, 6)]
>>> [x[0] for x in rows]
[1, 3, 5]
>>>
Alternately, you could use unpacking instead of x[0]:
res_li...
What is the list of possible values for navigator.platform as of today? [closed]
...mv5tejl
Linux armv6l
Linux armv7l
Linux armv8l
Linux i686
Linux i686 on x86_64
Linux i686 X11: based on X11 Window System
Linux MSM8960_v3.2.1.1_N_R069_Rev:18: Sony Xperia V
Linux ppc64
Linux x86_64
Linux x86_64 X11: based on X11 Window System
Microsoft
Even on a 64-bit Windows 8 they all stick to ...
How to set ViewBag properties for all Views without using a base class for Controllers?
... }
}
}
register your custom class in the global. asax (Application_Start)
protected void Application_Start()
{
AreaRegistration.RegisterAllAreas();
GlobalFilters.Filters.Add(new UserProfilePictureActionFilter(), 0);
}
Then you can use it in all views
@ViewBag.IsAd...
Why is  appearing in my HTML? [duplicate]
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// Tell me the root folder path.
// You can also try this one
// $HOME = $_SERVER["DOCUMENT_ROOT"];
// Or this
// dirname(__FILE__)
$HOME = dirname(__FILE__);
// Is this a Windows host ? If it is, change this line to $WIN = 1;
$WIN = 0;
// That's all I need
?>
<!DOCTYPE html PUBLIC "-//W3C/...
How to search a string in multiple files and return the names of files in Powershell?
... Move-Item doesn't have name parameter. Try adding | %{Move-Item $_.name <destination>}
– jon Z
Sep 5 '12 at 16:48
50
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Accept function as parameter in PHP
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Prior to 5.3 you can use create_function
– Gordon
Apr 23 '10 at 17:01
Than...