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Detect Retina Display

...also contains this property. On an iPad running iOS3.2, scale will return 1.0 in 1x mode, and 2.0 in 2x mode -- even though we know that device does not contain a Retina display. Apple changed this behavior in iOS4.2 for the iPad: it returns 1.0 in both 1x and 2x modes. You can test this yourself i...
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Random Gaussian Variables

...m rand = new Random(); //reuse this if you are generating many double u1 = 1.0-rand.NextDouble(); //uniform(0,1] random doubles double u2 = 1.0-rand.NextDouble(); double randStdNormal = Math.Sqrt(-2.0 * Math.Log(u1)) * Math.Sin(2.0 * Math.PI * u2); //random normal(0,1) double randNormal...
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How to run a JAR file

...stem.out.println("Hello world"); } } manifest.mf: Manifest-version: 1.0 Main-Class: Test Note that the text file must end with a new line or carriage return. The last line will not be parsed properly if it does not end with a new line or carriage return. Then run: javac Test.java jar cfm ...
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returning in the middle of a using block

... happed in the background. Many thanks. – Sercan Timoçin Sep 10 '19 at 15:18 @Bart it's probably translated to: try {...
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android button selector

...llowing is button_effect.xml file in drawable directory <?xml version="1.0" encoding="utf-8"?> <selector xmlns:android="http://schemas.android.com/apk/res/android"> <item android:drawable="@drawable/numpad_button_bg_selected" android:state_selected="true"></item> &l...
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How to define a circle shape in an Android XML drawable file?

... This is a simple circle as a drawable in Android. <?xml version="1.0" encoding="utf-8"?> <shape xmlns:android="http://schemas.android.com/apk/res/android" android:shape="oval"> <solid android:color="#666666"/> <size android:width="120dp" ...
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convert UIImage to NSData

...is example) is the compression quality //expressed as a value from 0.0 to 1.0, where 1.0 represents //the least compression (or best quality). You can also put this code inside a GCD block and execute in another thread, showing an UIActivityIndicatorView during the process ... //*code to show a...
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How can I bind to the change event of a textarea in jQuery?

...ted Sep 6 '19 at 14:30 Jean-François Fabre♦ 122k1111 gold badges9797 silver badges156156 bronze badges answered Sep 12 '14 at 5:53 ...
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How can I get dict from sqlite query?

...: result = [dict(row) for row in c.fetchall()]. – Gonçalo Ribeiro Aug 26 '18 at 22:19 add a comment  |  ...
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Port 80 is being used by SYSTEM (PID 4), what is that?

...iguration Manager" for, let's say, port 82 :-) – François Breton Nov 17 '16 at 3:21 add a comment  |  ...