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How to synchronize a static variable among threads running different instances of a class in Java?
... synchronizes on the class object.
public class Test {
private static int count = 0;
public static synchronized void incrementCount() {
count++;
}
}
Explicitly synchronize on the class object.
public class Test {
private static int count = 0;
public void incrementCo...
Is gcc std::unordered_map implementation slow? If so - why?
...There is already a report in the mailing list. The discussion seem to be pointing to "fixes" to max_load_factor handling, which led to the difference in performance.
– jxh
Jul 24 '12 at 18:21
...
What is the difference between const and readonly in C#?
...lass defined in AssemblyA.
public class Const_V_Readonly
{
public const int I_CONST_VALUE = 2;
public readonly int I_RO_VALUE;
public Const_V_Readonly()
{
I_RO_VALUE = 3;
}
}
AssemblyB references AssemblyA and uses these values in code. When this is compiled,
in the case of the ...
C/C++ line number
...processing, they are replaced respectively by a constant string holding an integer representing the current line number and by the current file name.
Others preprocessor variables :
__func__ : function name (this is part of C99, not all C++ compilers support it)
__DATE__ : a string of form "Mmm d...
How can I create tests in Android Studio?
Just downloaded Android Studio which is based off of the Intellij Idea.
12 Answers
12
...
reducing number of plot ticks
I have too many ticks on my graph and they are running into each other.
7 Answers
7
...
Find running median from a stream of integers
... data is a tough problem, and finding an exact solution with memory constraints efficiently is probably impossible for the general case. On the other hand, if the data has some characteristics we can exploit, we can develop efficient specialized solutions. For example, if we know that the data is an...
Read String line by line
...air comparison though - String.split relies on the entire input being read into memory, which isn't always feasible (e.g. for large files).
– Adamski
Jul 8 '09 at 8:00
3
...
Conveniently Declaring Compile-Time Strings in C++
...require constexpr though.
Here's how you can use it, and what it can do:
int
main()
{
constexpr str_const my_string = "Hello, world!";
static_assert(my_string.size() == 13, "");
static_assert(my_string[4] == 'o', "");
constexpr str_const my_other_string = my_string;
static_asse...
How do I serialize an object and save it to a file in Android?
...unctionality is implicitly added to your class if you use the Serializable interface. If all you want is simple object serialization, that is what I would use. It is extremely easy to implement too. developer.android.com/reference/java/io/Serializable.html
– mtmurdock
...