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Hidden Features of Java

...en I first discovered it, never heard of it before. ThreadLocals are typically not so widely known as a way to store per-thread state. Since JDK 1.5 Java has had extremely well implemented and robust concurrency tools beyond just locks, they live in java.util.concurrent and a specifically interest...
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How to change Navigation Bar color in iOS 7?

... Guide if (floor(NSFoundationVersionNumber) <= NSFoundationVersionNumber_iOS_6_1) { // iOS 6.1 or earlier self.navigationController.navigationBar.tintColor = [UIColor redColor]; } else { // iOS 7.0 or later self.navigationController.navigationBar.barTintCo...
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How to get String Array from arrays.xml file

...c class Episode7 extends ListActivity { String[] mTestArray; /** Called when the activity is first created. */ @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); // Create an ArrayAdapter that will contain all list ite...
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How to get key names from JSON using jq

...fy -r then you get a quoted string, which looks fine on-screen, but you usually don't want the quotes embedded in the string. – MarkHu Apr 26 '18 at 2:49 4 ...
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How to filter object array based on attributes?

...art of the new ECMAScript 5th Edition standard, and can be found on almost all modern browsers. For IE, you can include the following method for compatibility: if (!Array.prototype.filter) { Array.prototype.filter = function(fun /*, thisp*/) { var len = this.length >>> 0; if (ty...
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How to create abstract properties in python abstract classes

In the following code, I create a base abstract class Base . I want all the classes that inherit from Base to provide the name property, so I made this property an @abstractmethod . ...
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Reading InputStream as UTF-8

...ug that the OutputStreamWriter constructors have: only one of the four actually condescends to tell you when something goes wrong. You again have to use the fancy CharsetDecoder dec argument there, too. The only safe and sane thing to do is to consider all other constructors deprecated, because they...
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Right way to initialize an OrderedDict using its constructor such that it retains order of initial d

... See __hash__. Specifically about the str type. – metatoaster Aug 25 '14 at 6:43 ...
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John Carmack's Unusual Fast Inverse Square Root (Quake III)

...s derived is something of a mystery. To quote Gary Tarolli: Which actually is doing a floating point computation in integer - it took a long time to figure out how and why this works, and I can't remember the details anymore. A slightly better constant, developed by an expert mathemat...
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Render a variable as HTML in EJS

...de ('newline slurping') with -%> ending tag Whitespace-trim mode (slurp all whitespace) for control flow with <%_ _%> Control flow with <% %> So, in your case it is going to be <%- variable %> where variable is something like var variable = "text here <br> and some more t...