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How can I check whether an array is null / empty?
....println("array is empty");
}
An alternative definition of "empty" is if all the elements are null:
Object arr[] = new Object[10];
boolean empty = true;
for (int i=0; i<arr.length; i++) {
if (arr[i] != null) {
empty = false;
break;
}
}
or
Object arr[] = new Object[10];
boolean e...
Why doesn't the example compile, aka how does (co-, contra-, and in-) variance work?
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Generically, a covariant type parameter is one which is allowed to vary down as the class is subtyped (alternatively, vary with subtyping, hence the "co-" prefix). More concretely:
trait List[+A]
List[Int] is a subtype of List[A...
What are bitwise operators?
I'm someone who writes code just for fun and haven't really delved into it in either an academic or professional setting, so stuff like these bitwise operators really escapes me.
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Why JavaScript rather than a standard browser virtual machine?
...n the browser rather than requiring the use of a specialized language -- really, a specialized paradigm -- for client scripting only?
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jQuery: Count number of list elements?
... recommend using .length over .size() to avoid the overhead of a function call. api.jquery.com/size
– Joe
Dec 1 '11 at 23:18
4
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Best Practice to Organize Javascript Library & CSS Folder Structure [closed]
...dex file or main entry point. appcropolis-project my-index.html Generally, your application will be comprised of HTML, CSS, Images, and Javascript files. Some of those files will be specific to your application and some others can be used across multiple applications. This is a very important ...
Differences between ExpandoObject, DynamicObject and dynamic
...c keyword to interact with a normal instance, the DLR performs late-bound calls to the instance's normal methods.
The IDynamicMetaObjectProvider interface allows a class to take control of its late-bound behavior.
When you use the dynamic keyword to interact with an IDynamicMetaObjectProvider imple...
Android encryption / decryption using AES [closed]
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@Maarten Bodewes I see your warnings all over the place, under manyt posts. Could you please provide a good solution instead?
– Yar
Mar 30 '18 at 12:27
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What are forward declarations in C++?
...add' (or any other types, classes or functions) before it is used.
This really just allows the compiler to do a better job of validating the code, and allows it to tidy up loose ends so it can produce a neat looking object file. If you didn't have to forward declare things, the compiler would produ...
Bigger Glyphicons
...t-size:1.5em;" class="glyphicon glyphicon-th-list"></span>
This allows you to change size on the fly. Works best for ad hoc requirements to change the size, rather than changing the css and having it apply to all.
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