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What are sessions? How do they work?

... to store that data server side, give it an "id", and let the client only know (and pass back at every http request) that id. There you go, sessions implemented. Or you can use the client as a convenient remote storage, but you would encrypt the data and keep the secret server-side. Of course there...
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How to remove CocoaPods from a project?

...that existed before you integrated CocoaPods. If I missed anything let me know and I will edit this. Also we're always looking for suggestions for how to improve CocoaPods so if you have an issues please submit them in our issue tracker so we can come up with a way to fix them! EDIT As shown by J...
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Java: Date from unix timestamp

...ent the specified number of milliseconds since the standard base time known as "the epoch", namely January 1, 1970, 00:00:00 GMT. share | improve this answer | follo...
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Can a class member function template be virtual?

... just indirection, and there is no "runtime figuring out" involved, it is known during compile time that the function to be called is the one pointed to by the n-th pointer in the vtable. "Figuring out" implies there are type checks and such, which is not the case. Once the run-time system figured o...
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Choosing a Java Web Framework now? [closed]

...ng for. I can't really talk about (recent versions) of Flex and GWT but I know that Grails does have some fans. Actually, I'd suggest to take a look at Matt Raible's presentations, he really did a great job at comparing web frameworks, showing their strengths and weakness, gathering facts and numb...
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Common elements in two lists

... Use Collection#retainAll(). listA.retainAll(listB); // listA now contains only the elements which are also contained in listB. If you want to avoid that changes are being affected in listA, then you need to create a new one. List<Integer> common = new ArrayList<Integer>(...
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View contents of database file in Android Studio

...database and select Save As.... Save it anywhere you want on your PC. Now, open the SQLiteBrowser you installed. Click on 'open database', navigate to the location you saved the database file, and open. You can now view the contents of your database. To view your database on your mobile devi...
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Is there a “null coalescing” operator in JavaScript?

... Update JavaScript now supports the nullish coalescing operator (??). It returns its right-hand-side operand when its left-hand-side operand is null or undefined, and otherwise returns its left-hand-side operand. Please check compatibility be...
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What are the precise rules for when you can omit parenthesis, dots, braces, = (functions), etc.?

...he parenthesis if there is less than two parameters passed to the method. Now, the operator notation is a notation for method-call, which means it can't be used in the absence of the object which is being called. I'll briefly detail the notations. Prefix: Only ~, !, + and - can be used in prefix...
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Why use getters and setters/accessors?

...erns. And what other objects (breaks) the method notifies I don't want to know either. – sbi Aug 24 '12 at 9:35 8 ...