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Is the != check thread safe?
...g/Object;
ALOAD 0
GETFIELD test/Test1.a : Ljava/lang/Object;
IF_ACMPEQ L1
...
as we can see it loads field a to local vars twice, it's a non-atomic operation, if a was changed in between by another thread comparison may produce false.
Also, memory visibility problem is relevant here...
In an array of objects, fastest way to find the index of an object whose attributes match a search
...y your criteria. For example: function hashf(el) { return String(el.id) + "_" + String(el.name); }. This is just a hint: elementPos = array.map(hashf(x)).indexOf(hash({id:3, name:'Pablo'})); Obviously, the hash function I provide is not valid for all cases since '_' could form part of your values bu...
Check whether or not the current thread is the main thread
...be executed on the main thread, you can:
- (void)someMethod
{
dispatch_block_t block = ^{
// Code for the method goes here
};
if ([NSThread isMainThread])
{
block();
}
else
{
dispatch_async(dispatch_get_main_queue(), block);
}
}
...
Windows 7, 64 bit, DLL problems
...
VS2015 vcredist_*.exe installs these DLLs, but other methods, like MSMs supplied with VS do not. vcredist includes these DLLs, and you'll need the minimum required platform. (Note I had to install windows 7 sp1 twice for it to take effect -...
Manipulating an Access database from Java without ODBC
...Connection conn=DriverManager.getConnection(
"jdbc:ucanaccess://C:/__tmp/test/zzz.accdb");
Statement s = conn.createStatement();
ResultSet rs = s.executeQuery("SELECT [LastName] FROM [Clients]");
while (rs.next()) {
System.out.println(rs.getString(1));
}
Disclosure
At the time of ...
How to perform mouseover function in Selenium WebDriver using Java?
...worked for me as well when adding .perform()
– TheRed__
Feb 27 '15 at 13:19
1
Cant belive this is...
What is the difference between #import and #include in Objective-C?
...tions asked.
So if you have a file a.h with this contents:
typedef int my_number;
and a file b.c with this content:
#include "a.h"
#include "a.h"
the file b.c will be translated by the preprocessor before compilation to
typedef int my_number;
typedef int my_number;
which will result in a c...
How to compile for Windows on Linux with gcc/g++?
...torial here at the Code::Blocks forum. Mind that the command changes to x86_64-w64-mingw32-gcc-win32, for example.
Ubuntu, for example, has MinGW in its repositories:
$ apt-cache search mingw
[...]
g++-mingw-w64 - GNU C++ compiler for MinGW-w64
gcc-mingw-w64 - GNU C compiler for MinGW-w64
mingw-w6...
Maven build failed: “Unable to locate the Javac Compiler in: jre or jdk issue”
I have my JAVA_HOME set to:
32 Answers
32
...
Django: “projects” vs “apps”
...min.py startproject myproduct
cd myproduct
mkdir myproduct
touch myproduct/__init__.py
touch myproduct/models.py
touch myproduct/views.py
and so on. Would it help if I said views.py doesn't have to be called views.py? Provided you can name, on the python path, a function (usually package.package.v...