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How to check for a valid URL in Java?

...hat you can set to control how this class behaves, by default http, https, and ftp are accepted. share | improve this answer | follow | ...
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How to convert int to NSString?

...s with @() expression. So the shortest way is to transform int to NSNumber and pick up string representation with stringValue method: NSString *strValue = [@(myInt) stringValue]; or NSString *strValue = @(myInt).stringValue; ...
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Android OnClickListener - identify a button

...b1); b2 = (Button) findViewById(R.id.b2); b1.setOnClickListener(myhandler1); b2.setOnClickListener(myhandler2); ... } View.OnClickListener myhandler1 = new View.OnClickListener() { public void onClick(View v) { // it was the 1st button } }; View.OnClickListener ...
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How can I make Flexbox children 100% height of their parent?

... Please add removing height: 100% to the answer - I nearly gave up and only saw this at the last moment before reverting to absolute - which comes with all sorts of problems. – Peter May 2 at 10:18 ...
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Split list into multiple lists with fixed number of elements

...rate question. Scala has a mysterious gnome that chooses a data structure, and it chose a Stream for you. If you want a List, you should request a List, but you can also just trust the gnome's judgment. – Ion Freeman Jun 21 '17 at 21:09 ...
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AppSettings get value from .config file

...embly reference to System.Configuration Go to your Solution Explorer and right click on References and select Add reference. Select the Assemblies tab and search for Configuration. Here is an example of my App.config: <?xml version="1.0" encoding="utf-8" ?> <configuration> ...
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How to detect UI thread on Android?

Is there a robust way to detect if Thread.currentThread() is the Android system UI thread in an application? I would like to put some asserts in my model code that asserts that only one thread ( eg the ui thread) accesses my state, to assure that no kind of synchronization is necessary. ...
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How to get a vertical geom_vline to an x-axis of class date?

Even though I found Hadley's post in the google group on POSIXct and geom_vline , I could not get it done. I have a time series from and would like to draw a vertical line for years 1998, 2005 and 2010 for example. I tried with ggplot and qplot syntax, but still I either see no vertical line ...
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UINavigationController “back button” custom text?

... Just to clarify Tyler's comment because I did not understand this at first: Setting the backBarButtonItem in a view controllers navigationItem is setting the button that will show to get BACK to this view controller. Also note that although there is no button style for the arrow bu...
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How do I create an empty array/matrix in NumPy?

...t I would normally use a list. I want to create an empty array (or matrix) and then add one column (or row) to it at a time. ...