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Why is a round-trip conversion via a string not safe for a double?
...t;sPositiveInfinity);
goto lExit;
}
NumberToDouble(&number, &dTest);
if (dTest == value) {
gc.refRetVal = NumberToString(&number, 'G', DOUBLE_PRECISION, gc.numfmt);
goto lExit;
}
DoubleToNumber(value, 17, &number);
DoubleToNumber is pretty simple -- it just calls _ec...
Cannot drop database because it is currently in use
...
select * from sys.sysprocesses where dbid = DB_ID('Test')
(Replace 'Test' with the name of the database you are trying to drop)
This will tell you which processes are using it.
If you still want to force drop then, the ultimate approach is:
USE master;
GO
ALTER DATABASE T...
What do “branch”, “tag” and “trunk” mean in Subversion repositories?
...
Tags directory is also often used for milestones testing and verification by the regular user. This would be a good place to put a prototype too (just some ideas on top of my head).
– Jeff Noel
Oct 26 '12 at 7:09
...
Skip callbacks on Factory Girl and Rspec
I'm testing a model with an after create callback that I'd like to run only on some occasions while testing. How can I skip/run callbacks from a factory?
...
Make a link in the Android browser start up my app?
... above.
This works with the built-in browser, Opera, and Firefox (haven't tested any other browser). Firefox asks 'This link needs to be opened with an application' (ok, cancel). Other browsers apparently don't worry about security that much, they just open the app, no questions asked.
...
c++11 智能指针回调的经典场景 - C/C++ - 清泛网 - 专注C/C++及内核技术
...要执行；弱指针：允许某情况下任务丢弃不执行。
void Test( ClientWPtr wPtr) {
auto backtask = [&, wPtr](){
std::cout << "client task begin..." << std::endl;
std::this_thread::sleep_for(std::chrono::milliseconds(50));
ClientPtr myClient = wPtr.lock();
//auto ...
discuz插件开发新手入门 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...需要的文件。如下图 我在模块里面定义了 页面嵌入的 test1类文件，则需要在插件文件夹中新建一个test1.class.php的文件
下面是需要注意的东西。
test1.class.php中 文件的上部分 是discuz的引入部分，而下面的类名必须要和插件的...
Routes with Dash `-` Instead of Underscore `_` in Ruby on Rails
...do
collection do
get 'my-method', to: :my_method
end
end
You can test in console:
rails routes -g my_resources
my_method_my_resources GET /my-resources/my-method(.:format) my_resources#my_method
share
|...
How to send SMS in Java
...
You Can Do this With A GSM Modem and Java Communications Api [Tried And Tested]
First You Need TO Set Java Comm Api
This Article Describes In Detail How to Set Up Communication Api
Next You Need A GSM Modem (preferably sim900 Module )
Java JDK latest version preferable
AT Command Guide
Code...
Mimicking sets in JavaScript?
...the list if it wasn't already there
obj[A] = true;
For completeness, the test for whether A is in the list is a little safer with this:
if (Object.prototype.hasOwnProperty.call(obj, A))
// put code here
}
because of potential conflict between built-in methods and/or properties on the base Obj...