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Is an index needed for a primary key in SQLite?
... integer affinity
and a unique index, not as an alias for the rowid.
See: http://www.sqlite.org/lang_createtable.html#rowid
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How can I represent an 'Enum' in Python?
...34. Code is not perfectly compatible between py2 and py3, e.g. you'll need __order__ in python 2).
To use enum34, do $ pip install enum34
To use aenum, do $ pip install aenum
Installing enum (no numbers) will install a completely different and incompatible version.
from enum import Enum #...
Fatal error: “No Target Architecture” in Visual Studio
...
_WIN32 identifier is not defined.
use #include <SDKDDKVer.h>
MSVS generated projects wrap this include by generating a local "targetver.h"which is included by "stdafx.h" that is comiled into a precompiled-header throu...
Specifically, what's dangerous about casting the result of malloc?
...
You won't get a compiler error, but a compiler warning. As the sources you cite say (especially the first one), you can get an unpredictable runtime error when using the cast without including stdlib.h.
So the error on your side is not the ...
Find size of Git repository
...ize: git count-objects -vH (see answer by @VonC)
For different ideas of "complete size" you could use:
git bundle create tmp.bundle --all
du -sh tmp.bundle
Close (but not exact:)
git gc
du -sh .git/
With the latter, you would also be counting:
hooks
config (remotes, push branches, settings...
How to sort two lists (which reference each other) in the exact same way
... of 10000 random ints): %timeit index = range(len(l1)); index.sort(key=l1.__getitem__); map(l1.__getitem__, index); map(l2.__getitem__, index) 100 loops, best of 3: 8.04 ms per loop (vs 9.17 ms, 9.07 ms for senderle's timits)
– Quantum7
Aug 12 '13 at 21:35
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Vertically align text next to an image?
...n to img -->
<div>
<img style="vertical-align:middle" src="https://placehold.it/60x60">
<span style="">Works.</span>
</div>
Tested in FF3.
Now you can use flexbox for this type of layout.
.box {
display: flex;
align-items:center;
}
<...
How to use filter, map, and reduce in Python 3
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@Breezer actually i**3 will call i.__pow__(3) and i*i*i i.__mul__(i).__mul__(i) (or something like that). With ints it doesn't matter but with numpy numbers/custom classes it might even produce different results.
– syntonym
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Is it better in C++ to pass by value or pass by constant reference?
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It used to be generally recommended best practice1 to use pass by const ref for all types, except for builtin types (char, int, double, etc.), for iterators and for function objects (lambdas, classes deriving from std::*_function).
This was especiall...
How to printf uint64_t? Fails with: “spurious trailing ‘%’ in format”
I wrote a very simple test code of printf uint64_t:
3 Answers
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