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Why do I need Transaction in Hibernate for read-only operations?
...l be returned to the Connection Pool with transaction being not committed. What happens then? JDBC keeps silence, thus this is implementation specific (MySQL rolls back transaction, Oracle afair commits it). This also can be configured on Connection Pool level (e.g. C3P0 gives you such an option, ro...
List or IList [closed]
...st.Insert(0, 0);
ilist.Remove(3);
ilist.RemoveAt(0);
}
else
{
// what were you planning to do if you were given a read only list anyway?
}
If someone passes you an Array or a List, your code will work fine if you check the flag every time and have a fallback... But really; who does that?...
Add Keypair to existing EC2 instance
...nd edit files on the root EBS volume on an EC2 instance even if you are in what you considered a disastrous situation like:
You lost your ssh key or forgot your password
You made a mistake editing the /etc/sudoers file and can no longer
gain root access with sudo to fix it
Your long running instan...
Need to reset git branch to origin version
...
Assuming this is what happened:
# on branch master
vi buggy.py # you edit file
git add buggy.py # stage file
git commit -m "Fix the bug" # commit
vi tests.py # edit another file but do not commit ye...
Why should hash functions use a prime number modulus?
... to a small integer, you can just make the bucket_count prime and not care what the stride is provided it isn't 0.]
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Make Iframe to fit 100% of container's remaining height
... this answer is left for historical reasons.
The trick is to understand what the 100% is taken of. Reading CSS specs can help you there.
To make a long story short - there is such a thing as "containing block" - which is not necessary the parent element. Simply said, it is the first element up t...
Is module __file__ attribute absolute or relative?
I'm having trouble understanding __file__ . From what I understand, __file__ returns the absolute path from which the module was loaded.
...
Does bit-shift depend on endianness?
... and of modulo and divide are implementation defined on negative integers. What other things have you in mind which are implementation-defined?
– Kerrek SB
Aug 25 '11 at 10:24
...
Conditionally use 32/64 bit reference when building in Visual Studio
...
Here is what I've done in a previous project, which will require the manual edition of the .csproj file(s). You also need separate directories for the different binaries, ideally siblings of each other, and with the same name as the ...
How do you know when to use fold-left and when to use fold-right?
...
Well, what you described are actually foldl1 and foldr1 in Haskell (foldl and foldr take an external initial value), and Haskell's "cons" is called (:) not (::), but otherwise this is correct. You may want to add that Haskell addi...