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What is Java String interning?
...ts for fields, and:
static final String s = "abc" points to the constant table through the ConstantValue Attribute
non-final fields don't have that attribute, but can still be initialized with ldc
Conclusion: there is direct bytecode support for the string pool, and the memory representation is ...
What is the difference between a weak reference and an unowned reference?
...e counts for the object (weak reference points to something called a "side table" rather than the object itself ). When the strong reference count reaches zero, the object gets deinitialised, but it cannot be deallocated if the unowned reference count is more than zero.
Now a dangling pointer is so...
When is TCP option SO_LINGER (0) required?
...B receives ACK
B goes to CLOSED state – i.e. is removed from the socket tables
TIME_WAIT
So the peer that initiates the termination – i.e. calls close() first – will end up in the TIME_WAIT state.
To understand why the TIME_WAIT state is our friend, please read section 2.7 in "UNIX Netwo...
How to load/edit/run/save text files (.py) into an IPython notebook cell?
...
Drag and drop a Python file in the Ipython notebooks "home" notebooks table, click upload. This will create a new notebook with only one cell containing your .py file content
Else copy/paste from your favorite editor ;)
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What makes Lisp macros so special?
...like:
(setvar *rows* (sql select count(*)
from some-table
where column1 = "Yes"
and column2 like "some%string%")
And thats not even getting into Reader macros.
Hope this helps.
...
The Definitive C Book Guide and List
...plications in particular, but it applies to any area of application where stable, bug-free C code is desired (who doesn't want fewer bugs?). MISRA-C is becoming the de facto standard in the whole embedded industry and is getting increasingly popular even in other programming branches. There are (at ...
Differences between Oracle JDK and OpenJDK
... I'm late to the party, but I'll ask anyway. What does jdk bring to the table that openjdk doesn't? All these answers make openjdk sound like it's equal to or superior in every way, but if that's the case why does Oracle even bother maintaining jdk?
– Kefka
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What does it mean to “program to an interface”?
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Using interfaces is a key factor in making your code easily testable in addition to removing unnecessary couplings between your classes. By creating an interface that defines the operations on your class, you allow classes that want to use that functionality the ability to use it withou...
HTML 5 tag vs Flash video. What are the pros and cons?
...net. Your argument was heard some time ago when people started moving from table based layout to divs and css.
– hannson
Jul 7 '09 at 2:54
2
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Is the order of iterating through std::map known (and guaranteed by the standard)?
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std::map is a sorted associative container
std::unordered_map is a hash-table based associative container introduced in C++11
So, in order to clarify the guarantees on ordering.
In C++03:
std::set, std::multiset, std::map and std::multimap are guaranteed to be ordered according to the keys (...