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Sockets: Discover port availability using Java
How do I programmatically determine the availability of a port in a given machine using Java?
10 Answers
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UIPanGestureRecognizer - Only vertical or horizontal
I have a view that has a UIPanGestureRecognizer to drag the view vertically. So in the recognizer callback, I only update the y-coordinate to move it. The superview of this view, has a UIPanGestureRecognizer that will drag the view horizontally, just updating the x-coordinate.
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Get property value from string using reflection
...as of C#6 like this: nameof(TimeOfDay.Minutes) on the name parameter when calling the function to rid magic strings and add compile time safety to these calls.
– Reap
May 30 at 4:50
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Hiding user input on terminal in Linux script
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Just supply -s to your read call like so:
$ read -s PASSWORD
$ echo $PASSWORD
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Get push notification while App in foreground iOS
...nd, use the following method.
iOS 10, Swift 3/4 :
// This method will be called when app received push notifications in foreground
func userNotificationCenter(_ center: UNUserNotificationCenter, willPresent notification: UNNotification, withCompletionHandler completionHandler: @escaping (UNNotific...
What are Aggregates and PODs and how/why are they special?
...clared default constructor is value-initialized its default constructor is called. If the default constructor is implicitly defined then all nonstatic members are recursively value-initialized. This definition is imprecise and a bit incorrect but it should give you the basic idea. A reference cannot...
Making git auto-commit
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On Linux you could use inotifywait to automatically execute a command every time a file's content is changed.
Edit: the following command commits file.txt as soon as it is saved:
inotifywait -q -m -e CLOSE_WRITE --format="git commit -m 'autocommit on change' %w" file.t...
Coding Practices which enable the compiler/optimizer to make a faster program
...sizes by using these.
Declare small functions as inline or macros
Each call to a function (or method) incurs overhead, such as pushing variables onto the stack. Some functions may incur an overhead on return as well. An inefficient function or method has fewer statements in its content than th...
Reverse colormap in matplotlib
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+1. However, this won't generically reverse any colormap. Only ListedColormaps (i.e. discrete, rather than interpolated) have a colors attribute. Reversing LinearSegmentedColormaps is a bit more complex. (You need to reverse every item in the _segmentdat...
How to save a plot as image on the disk?
...ld like to save that image as PNG or JPEG, is it possible to do it automatically? (via code)
11 Answers
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