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Make sure that the controller has a parameterless public constructor error

... What's happening is that you're bitten by this problem. Basically, what happened is that you didn't register your controllers explicitly in your container. Unity tries to resolve unregistered concrete types for you, but because it can't resolve it (caused by an error in your configurat...
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Does Dart support enumerations?

...ase Fruit.apple: print('it is an apple'); break; } // get all the values of the enums for (List<Fruit> value in Fruit.values) { print(value); } // get the second value print(Fruit.values[1]); } The old approach before 1.8: class Fruit { static const APPLE =...
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Query for documents where array size is greater than 1

... Great, that was perfect thank you. Although I actually have some documents that don't have a name so had to modify the query to be: db.accommodations.find( { $where: "if (this.name && this.name.length > 1) {return this; } "} ); – emson ...
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How does std::forward work? [duplicate]

...d as possible and explain when std::forward would be incorrect if it was allowed to use template argument deduction. 3 An...
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Private and Protected Members : C++

... Public members of a class A are accessible for all and everyone. Protected members of a class A are not accessible outside of A's code, but is accessible from the code of any class derived from A. Private members of a class A are not accessible outside of A's code, or f...
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How to clear all the jobs from Sidekiq?

...ails application. Now the numbers of jobs becomes more, so I want to clear all the jobs. I tried the following command in console ...
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Why was “Avoid Enums Where You Only Need Ints” removed from Android's performance tips?

...ume that a developer is only adding enums where they're useful. The only really bad use I've seen of enums was in some harmony code where they really wanted ints (for bitmasks and the like) and the "enum" wasn't an enum in any reasonable sense. If you find yourself calling "ordinal()" a lot, that's ...
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How to get datetime in JavaScript?

... Semantically, you're probably looking for the one-liner new Date().toLocaleString() which formats the date in the locale of the user. If you're really looking for a specific way to format dates, I recommend the moment.js library....
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What is the JavaScript equivalent of var_dump or print_r in PHP? [duplicate]

... This really is not a proper answer as this is not an inherent feature or function of JavaScript and there are innumerable scenarios where one will absolutely not have access to console.log() – Chris Rasys ...
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Is explicitly closing files important?

In Python, if you either open a file without calling close() , or close the file but not using try - finally or the " with " statement, is this a problem? Or does it suffice as a coding practice to rely on the Python garbage-collection to close all files? For example, if one does this: ...