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Left Align Cells in UICollectionView
...tes for a particular index path. If you don't return the proper attributes from that function, you're likely to run into all sort of visual bugs, e.g. during insertion and deletion animations of cells or when using self-sizing cells by setting the collection view layout's estimatedItemSize.
The Appl...
std::vector versus std::array in C++
...;s resize, they reserve more space then they need. This is to prevent them from having to resize every time a new element is inserted. This behavior can be changed by providing a custom allocator, but I never felt the need to do that!
Edit: After reading Zud's reply to the question, I felt I sho...
使用App Inventor扩展实现多点触控：Rotation Detector · App Inventor 2 中文网
...etecting rotation gestures. You can download the apk file of the demo app from here. The demo app simply illustrates how to use the RotationDetector component to rotate an ImageSprite on canvas. The Designer view and block view of this demo app are shown below.
Here’s how to implement the r...
使用App Inventor扩展实现多点触控：Rotation Detector · App Inventor 2 中文网
...etecting rotation gestures. You can download the apk file of the demo app from here. The demo app simply illustrates how to use the RotationDetector component to rotate an ImageSprite on canvas. The Designer view and block view of this demo app are shown below.
Here’s how to implement the r...
使用App Inventor扩展实现多点触控：Rotation Detector · App Inventor 2 中文网
...etecting rotation gestures. You can download the apk file of the demo app from here. The demo app simply illustrates how to use the RotationDetector component to rotate an ImageSprite on canvas. The Designer view and block view of this demo app are shown below.
Here’s how to implement the r...
使用App Inventor扩展实现多点触控：Rotation Detector · App Inventor 2 中文网
...etecting rotation gestures. You can download the apk file of the demo app from here. The demo app simply illustrates how to use the RotationDetector component to rotate an ImageSprite on canvas. The Designer view and block view of this demo app are shown below.
Here’s how to implement the r...
Ensuring json keys are lowercase in .NET
...SP.NET MVC4 / WebAPI, you can use a CamelCasePropertyNamesContractResolver from Newtonsoft.Json library which included by default.
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Loop through properties in JavaScript object with Lodash
...ar key in myObject.options) {
// check also if property is not inherited from prototype
if (myObject.options.hasOwnProperty(key)) {
var value = myObject.options[key];
}
}
Edit: the accepted answer (_.forOwn()) should be https://stackoverflow.com/a/21311045/528262
...
Execute Python script via crontab
...esn't changes anything,
First, you should redirect both stdin and stderr from crontab execution like below:
*/2 * * * * /usr/bin/python /home/souza/Documets/Listener/listener.py > /tmp/listener.log 2>&1
then you can view the file /tmp/listener.log to see if the script executed as you ...
MongoDB: update every document on one field
...ongo only affects the first document and to update all documents resulting from the query one needs to use 'Multi' update flag. Sample code follows...
var collection = db.GetCollection("Foo");
var query = Query.GTE("No", 1); // need to construct in such a way that it will give all 20K //docs.
var u...