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Why do I need Transaction in Hibernate for read-only operations?
...affirmation that read only transactions have great performance benefit. At least, it doesn't seem to be the case in the context of hibernate.
– nimai
May 15 at 21:40
...
PHP $_SERVER['HTTP_HOST'] vs. $_SERVER['SERVER_NAME'], am I understanding the man pages correctly?
...TP_HOST'] == 'localhost:8080'
$_SERVER['SERVER_NAME'] == 'localhost'
(At least that's what I've noticed in Apache port-based virtualhosts)
As Mike has noted below, HTTP_HOST does not contain :443 when running on HTTPS (unless you're running on a non-standard port, which I haven't tested).
...
How to search a specific value in all tables (PostgreSQL)?
...hat can be used in search. This way it decrease the time of processing. At least in my test it reduced a lot.
CREATE OR REPLACE FUNCTION search_columns(
needle text,
haystack_columns name[] default '{}',
haystack_tables name[] default '{}',
haystack_schema name[] default '{public}'
...
Why is iostream::eof inside a loop condition (i.e. `while (!stream.eof())`) considered wrong?
... not the failbit. So, in.fail() works as expected, as long as there is at least one data to read. If all-blank streams are also acceptable, then the correct form is:
while( !(in>>ws).eof() )
{
int data;
in >> data;
if ( in.fail() ) /* handle with break or throw */;
/* ...
Why are Perl 5's function prototypes bad?
... provide essentially no benefit. You may as well not bother with them, at least in Perl 5. Perl 6 might be a different (better) story.
– Jonathan Leffler
Nov 17 '08 at 22:05
5
...
parseInt(null, 24) === 23… wait, what?
... a. Let R = 10.
If stripPrefix is true, then a. If the length of S is at least 2 and the
first two characters of S are either
“0x” or “0X”, then remove the first
two characters from S and let R = 16.
If S contains any character that is not a radix-R digit, then let Z be the
subst...
How does the @property decorator work in Python?
....fset is setter
True
>>> prop.fdel is deleter
True
Last but not least, the property object acts as a descriptor object, so it has .__get__(), .__set__() and .__delete__() methods to hook into instance attribute getting, setting and deleting:
>>> class Foo: pass
...
>>>...
Differences between Ant and Maven [closed]
...Ant is a set of car parts. With Ant you have to build your own car, but at least if you need to do any off-road driving you can build the right type of car.
To put it another way, Maven is a framework whereas Ant is a toolbox. If you're content with working within the bounds of the framework then M...
Does bit-shift depend on endianness?
...estion, an shift operation << should be thought as shifting from LSB(least significant byte) to MSB(most significant byte).
Then as for the example in the question:
numb=1025
Little Endian
LSB 00000001 00000100 00000000 00000000 MSB
So << 10 would be 10bit shifting from LSB to MSB....
Why do we need a pure virtual destructor in C++?
...
All you need for an abstract class is at least one pure virtual function. Any function will do; but as it happens, the destructor is something that any class will have—so it's always there as a candidate. Furthermore, making the destructor pure virtual (as opposed...