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Difference between Repository and Service Layer?
...OOP Design Patterns, what is the difference between the Repository Pattern and a Service Layer?
5 Answers
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How to hide element using Twitter Bootstrap and show it using jQuery?
...ated,
.hide is available, but it does not always affect screen readers and is deprecated as of v3.0.1
Second, use jQuery's .toggleClass(), .addClass() and .removeClass()
<div id="myId" class="hidden">Foobar</div>
To show it: $("#myId").removeClass('hidden');
To hide it: $("#myI...
Covariance, Invariance and Contravariance explained in plain English?
Today, I read some articles about Covariance, Contravariance (and Invariance) in Java. I read the English and German Wikipedia article, and some other blog posts and articles from IBM.
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Formula to determine brightness of RGB color
...GB values. I know it can't be as simple as adding the RGB values together and having higher sums be brighter, but I'm kind of at a loss as to where to start.
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Importance of varchar length in MySQL table
...serted dynamically. Because I can not be certain of the length of strings and do not want them cut off, I make them varchar(200) which is generally much bigger than I need. Is there a big performance hit in giving a varchar field much more length than necessary?
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Java Multiple Inheritance
In an attempt to fully understand how to solve Java's multiple inheritance problems I have a classic question that I need clarified.
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Check if a variable is a string in JavaScript
... in the case of strings created with new String(), but this is seldom used and recommended against[1][2]. See the other answers for how to handle these, if you so desire.
The Google JavaScript Style Guide says to never use primitive object wrappers.
Douglas Crockford recommended that primitive o...
Android Studio installation on Windows 7 fails, no JDK found
I downloaded Android Studio and attempted to launch the program.
29 Answers
29
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Unloading classes in java?
...r used is garbage collected. This means, references to every single class and to the classloader itself need to go the way of the dodo.
One possible solution to your problem is to have a Classloader for every jar file, and a Classloader for each of the AppServers that delegates the actual loading ...
How different is Objective-C from C++? [closed]
What are the main differences between Objective-C and C++ in terms of the syntax, features, paradigms, frameworks and libraries?
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