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What are the downsides to using Dependency Injection? [closed]
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A couple of points:
DI increases complexity, usually by increasing the number of classes since responsibilities are separated more, which is not always beneficial
Your code will be (somewhat) coupled to the dependency injection framework you use (or more gen...
Jackson serialization: ignore empty values (or null)
...fits your use case
public static class Request {
// ...
}
As noted in comments, in versions below 2.x the syntax for this annotation is:
@JsonSerialize(include = JsonSerialize.Inclusion.NON_NULL) // or JsonSerialize.Inclusion.NON_EMPTY
The other option is to configure the ObjectMapper direc...
SQL set values of one column equal to values of another column in the same table
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21
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XML schema or DTD for logback.xml?
...D for logback.xml file to have at least the very basic validation and auto-completion in IDEs like IDEA or Eclipse, but I never saw any solution.
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Incompatible implicit declaration of built-in function ‘malloc’
... ahh thanks :) still getting the hang of C, first C program coming from java :)
– SGE
Aug 13 '11 at 13:53
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How do I access the command history from IDLE?
On bash or Window's Command Prompt, we can press the up arrow on keyboard to get the last command, and edit it, and press ENTER again to see the result.
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Difference between break and continue statement
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102
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How do I check if file exists in jQuery or pure JavaScript?
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With jQuery:
$.ajax({
url:'http://www.example.com/somefile.ext',
type:'HEAD',
error: function()
{
//file not exists
},
success: function()
{
//file exists
}
});
EDIT:
Here is the code for checking 404 status, without using j...
What are all the uses of an underscore in Scala?
...tten!
Example showing why foo(_) and foo _ are different:
This example comes from 0__:
trait PlaceholderExample {
def process[A](f: A => Unit)
val set: Set[_ => Unit]
set.foreach(process _) // Error
set.foreach(process(_)) // No Error
}
In the first case, process _ represents...