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How to check if a file exists in the Documents directory in Swift?
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Nowadays (2016) Apple recommends more and more to use the URL related API of NSURL, NSFileManager etc.
To get the documents directory in iOS and Swift 2 use
let documentDirectoryURL = try! NSFileManager.defaultManager().URLForDirectory(.DocumentDirectory,
inD...
How do I iterate through the files in a directory in Java?
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@BoratSagdiyev, Not using the old Java file APIs, but if you're on a modern JVM then the java.nio.file.DirectoryStream allows you to iterate over a directory, and could be implemented to have a small memory footprint but the only way to tell for sure would be to monito...
Get size of folder or file
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Using java-7 nio api, calculating the folder size can be done a lot quicker.
Here is a ready to run example that is robust and won't throw an exception. It will log directories it can't enter or had trouble traversing. Symlinks are ignored, ...
Implicit “Submit” after hitting Done on the keyboard at the last EditText
... handled = true;
}
return handled;
}
});
Official API doc: https://developer.android.com/guide/topics/ui/controls/text.html#ActionEvent
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what is the difference between a portlet and a servlet?
...ly strong parallels between these two standards they differ in containers, APIs, life cycle, configuration, deployment, etc.
The main difference between portlet vs. servlet could be that while servlet always responds to single type of action - request, portlet (due to nature of its life cycle and ...
Store images in a MongoDB database
...ilename) {
return filename;
},
}));
post req to our db
app.post(‘/api/photo’,function(req,res){
var newItem = new Item();
newItem.img.data = fs.readFileSync(req.files.userPhoto.path)
newItem.img.contentType = ‘image/png’;
newItem.save();
});
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Android: Is it possible to display video thumbnails?
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If you are using API 2.0 or newer this will work.
int id = **"The Video's ID"**
ImageView iv = (ImageView ) convertView.findViewById(R.id.imagePreview);
ContentResolver crThumb = getContentResolver();
BitmapFactory.Options options=new Bitmap...
What should I use Android AccountManager for?
...not use an AccountManager without a SyncAdapter before Android 2.2 / Froyo API 8)
With AccountManager / SyncAdapter / ContentProvider:
AccountManager gives users a central point (Settings > Accounts) to define their credentials
Android decides when synchronization can be done via SyncAdapter....
Returning 'IList' vs 'ICollection' vs 'Collection'
...m confused about which collection type that I should return from my public API methods and properties.
6 Answers
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Android代码优化小技巧 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...解为Foo[]与Bar[]要比(Foo,Bar)好很多。(当然，为了某些好的API的设计，可以适当做一些妥协。但是在自己的代码内部，你应该多多使用分解后的容易。
通常来说，需要避免创建更多的对象。更少的对象意味者更少的GC动作，GC会对...