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Why do C and C++ compilers allow array lengths in function signatures when they're never enforced?
...of additional dimensions are necessary to allow the compiler to compute offsets correctly. In the following example, the foo function is passed a pointer to a two-dimensional array.
#include <stdio.h>
void foo(int args[10][20])
{
printf("%zd\n", sizeof(args[0]));
}
int main(int argc, c...
Checking if a double (or float) is NaN in C++
...ng NaN.
However the last option may not work with every compiler and some settings (particularly optimisation settings), so in last resort, you can always check the bit pattern ...
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Real world example about how to use property feature in python?
...
Other examples would be validation/filtering of the set attributes (forcing them to be in bounds or acceptable) and lazy evaluation of complex or rapidly changing terms.
Complex calculation hidden behind an attribute:
class PDB_Calculator(object):
...
@property
d...
Why doesn't Git ignore my specified file?
...rom the repository. You can do that by using git rm --cached sites/default/settings.php. This removes the file from the repository without physically deleting the file (that’s what the --cached does). After committing that change, the file will be removed from the repository, and ignoring it shoul...
How to pull a random record using Django's ORM?
...ply use:
MyModel.objects.order_by('?').first()
It is documented in QuerySet API.
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Javascript: Extend a Function
...o the caller never sees the
// call synchronously)
setTimeout(f, 0);
}
}
return publicSymbols;
})();
(Much of the above could be written a bit more compactly, but I wanted to use clear names like publicSymbols rather than my usual pubs or anonymous object l...
filter items in a python dictionary where keys contain a specific string
... editor after snippets, if snippets enabled
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Best Practices: working with long, multiline strings in PHP?
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Did you set that indentation in Your IDE (to set multilined string aligned to each part)?
– Krzysztof Trzos
Jun 15 '16 at 11:44
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Find the index of a dict within a list, by matching the dict's value
...teration and raise ValueError so the caller has consistency. Alternatively set next()'s default to -1.
– Ben Hoyt
Dec 8 '10 at 21:10
1
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How do I hide a menu item in the actionbar?
...
Get a MenuItem pointing to such item, call setVisible on it to adjust its visibility and then call invalidateOptionsMenu() on your activity so the ActionBar menu is adjusted accordingly.
Update: A MenuItem is not a regular view that's part of your layout. Its somethi...