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Getting raw SQL query string from PDO prepared statements
...bugging. Assumes anonymous parameters from
* $params are are in the same order as specified in $query
*
* @param string $query The sql query with parameter placeholders
* @param array $params The array of substitution parameters
* @return string The interpolated query
*/
public static functio...
Bootstrap carousel multiple frames at once
...left doesn't seem to work, as it scroll multiple blocks at a time, and the order seems off. Scrolling to the right works fine (though in the wrong direction). The issue I'm having with this is that it seems to create a lot of duplicates, which is not that bad... but not that good... so for every ite...
Backwards migration with Django South
...en you run ./manage.py migrate your_app, South runs all new migrations, in order. (It looks at the database tables to decide which ones are 'new').
However, you can also specify any migration by number, and South will migrate your database, either forward or backward, to take it to that point. So, ...
Dynamically updating plot in matplotlib
...
In order to do this without FuncAnimation (eg you want to execute other parts of the code while the plot is being produced or you want to be updating several plots at the same time), calling draw alone does not produce the plot ...
“Use the new keyword if hiding was intended” warning
...ace IShow and implements its method ShowData. Class B inherits Class A. In order to use ShowData method in Class B, we have to use keyword new in the ShowData method in order to hide the base class Class A method and use override keyword in order to extend the method.
interface IShow
{
protect...
What is “callback hell” and how and why does RX solve it?
...e from event handling code. You can easily handle details like async event ordering that are a nightmare when using state variables. I found RX was the cleanest implementation to perform a new network request after 3 network responses returned or to error handle the whole chain if one does not retur...
npm global path prefix
...l run without sudo would not be able to deposit links into /usr/local/bin/ etc.
– Steven Lu
Feb 12 '13 at 20:50
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show 9 more comments
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Typical AngularJS workflow and project structure (with Python Flask)
...tic
|-- css
|-- img
|-- js
|-- app.js, controllers.js, etc.
|-- lib
|-- angular
|-- angular.js, etc.
|-- partials
|-- templates
|-- index.html
Make sure your index.html includes AngularJS, as well as any other files:
<script src="static/lib/a...
test a file upload using rspec - rails
...args to the helper, rather than args for the post itself. E.g., I had post order_documents_path @order, document: file instead of post order_documents_path(@order), document: file.
– soupdog
Mar 16 '16 at 0:50
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C++ SpinLock 自旋锁的代码实现（全网最简略的方式） - C/C++ - 清泛网 - ...
...) {}
virtual ~SpinLock() {}
void lock() { while(f_.test_and_set(memory_order_acquire)); }
void unlock() { f_.clear(memory_order_release); }
};
2、有退避策略的自旋锁，尝试一定次数(65535)失败后让出线程调度权：
class SpinLockWithYield {
atomic_flag f_;
public...