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GCC dump preprocessor defines
...touch foo.h; cpp -dM foo.h
will show all the predefined macros.
If you use -dM without the -E option,
-dM is interpreted as a synonym for -fdump-rtl-mach.
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Does MongoDB's $in clause guarantee order
...course will be the natural order or by the selected index order as shown.
If you need to preserve this order, then you basically have two options.
So let's say that you were matching on the values of _id in your documents with an array that is going to be passed in to the $in as [ 4, 2, 8 ].
Appr...
How do I add a placeholder on a CharField in Django?
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do you need to specify forms.TextInput to do the attrs={'placeholder': 'Search'} declaration ?
– JhovaniC
Apr 11 '13 at 20:21
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Can not connect to local PostgreSQL
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I've added an extra link. As far as I know you can't really have postgresql without the postgresql.conf (even if it's been renamed). Your first task must be to find this.
– Philip Couling
Dec 13 '11 at 13:57
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Installing SciPy and NumPy using pip
...ns you linked in Installing SciPy have been removed, might be linking here now scipy.org/scipylib/building/windows.html
– jxramos
Aug 11 '15 at 20:52
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Get Root Directory Path of a PHP project
...oes depends where you use __DIR__ . It is relative to the file itself, so if in an include, inside a sub directory, it'll not return just your root directory.
– Iris
Jun 5 '15 at 14:00
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Signed to unsigned conversion in C - is it always safe?
...implementation-defined or an implementation-defined signal is raised.
Now we need to refer to (2) above. Your i will be converted to an unsigned value by adding UINT_MAX + 1. So the result will depend on how UINT_MAX is defined on your implementation. It will be large, but it will not overflow,...
What is __declspec and when do I need to use it?
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This is a Microsoft specific extension to the C++ language which allows you to attribute a type or function with storage class information.
Documentation
__declspec (C++)
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How to run code when a class is subclassed? [duplicate]
...f type (i.e. a class) is created by myclass = type(name, bases, clsdict).
If you want something special to happen at the moment of class-creation, then you have to modify the thing creating the class -- i.e. type. The way to do that is to define a subclass of type -- i.e. a metaclass.
A metaclass...
Adding a directory to $LOAD_PATH (Ruby)
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I would say go with $:.unshift File.dirname(__FILE__) over the other one, simply because I've seen much more usage of it in code than the $LOAD_PATH one, and it's shorter too!
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