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How do I find which rpm package supplies a file I'm looking for?
...ermining which package provides an installed application (since it may be different than what is in the current yum repository cache), and yum whatprovides <filename> is best suited for determining which package provides a yet-to-be-installed application. Each has their own purpose.
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java.lang.UnsupportedClassVersionError: Bad version number in .class file?
...r when I include an opensource library that I had to compile from source. Now, all the suggestions on the web indicate that the code was compiled in one version and executed in another version (new on old). However, I only have one version of JRE on my system. If I run the commands:
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Allowed memory size of 33554432 bytes exhausted (tried to allocate 43148176 bytes) in php
...emory at any random time during code execution. This had the upside of me now having the world's most memory efficient code, created in the hunt for a memory leak.
– Kris Selbekk
Oct 15 '13 at 18:13
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Resolving ambiguous overload on function pointer and std::function for a lambda using +
...ked up by an argument by Daniel Krügler, this unary + trick should be specified behaviour, i.e. you can rely on it (see discussion in the comments).
Still, I'd recommend using an explicit cast to the function pointer type if you want to avoid the ambiguity: you don't need to ask on SO what is does...
e.printStackTrace equivalent in python
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If you're working inside some kind of container such as Jython and therefore cannot just print the trace, you can format_exc instead to get a string.
– SeldomNeedy
Oct 14 '16 at 4:13
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Efficiently updating database using SQLAlchemy ORM
...d plain SQL in the same transaction. Basically, from one side, ORM data modifications will only hit the database when you flush the changes from your session. From the other side, SQL data manipulation statements don't affect the objects that are in your session.
So if you say
for c in session.que...
Two-dimensional array in Swift
...[0] += [345, 678]
If you had 3x2 array of 0(zeros) before these changes, now you have:
[
[0, 0, 234, 345, 678], // 5 elements!
[123, 456, 789],
[0, 0]
]
So be aware that sub arrays are mutable and you can redefine initial array that represented matrix.
Examine size/bounds before access...
Where is the Keytool application?
...\Program Files\Java\jdk1.8.0_121\bin
It is used for managing keys and certificates you can sign things with, in your case, probably a jar file.
If you provide more details of what you need to do, we could probably give you a more specific answer.
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Best way to find the intersection of multiple sets?
...e PR value, I think these features should be cut from Python 3000.
So now reduce(). This is actually the one I've always hated most, because, apart from a few examples involving + or *, almost every time I see a reduce() call with a non-trivial function argument, I need to grab pen and paper to...
Accessing a Dictionary.Keys Key through a numeric index
...t.Count -1);
You should not depend on the order of keys in a Dictionary. If you need ordering, you should use an OrderedDictionary, as suggested in this answer. The other answers on this page are interesting as well.
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