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Spring MVC: How to perform validation?
I would like to know what is the cleanest and best way to perform form validation of user inputs. I have seen some developers implement org.springframework.validation.Validator . A question about that: I saw it validates a class. Does the class have to be filled manually with the values from the us...
How can I control the width of a label tag?
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@Konrad Then the OP can use float or display: inline-block
– Josh Stodola
May 12 '10 at 16:08
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When do you use map vs flatMap in RxJava?
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map transform one event to another.
flatMap transform one event to zero or more event. (this is taken from IntroToRx)
As you want to transform your json to an object, using map should be enough.
Dealing with the FileNotFoundException...
Android: How can I pass parameters to AsyncTask's onPreExecute()?
I use an AsyncTask for loading operations that I implemented as an inner class.
4 Answers
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Docker and securing passwords
...play around with and one thing that keeps nagging me has been putting passwords in a Dockerfile. I'm a developer so storing passwords in source feels like a punch in the face. Should this even be a concern? Are there any good conventions on how to handle passwords in Dockerfiles?
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How to write trycatch in R
I want to write trycatch code to deal with error in downloading from the web.
5 Answers
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Explain the concept of a stack frame in a nutshell
...me would represent a function call and its argument data.
If I remember correctly, the function return address is pushed onto the stack first, then the arguments and space for local variables. Together, they make the "frame," although this is likely architecture-dependent. The processor knows how ...
How to force a SQL Server 2008 database to go Offline
How do I force my Database to go Offline, without regard to what or who is already using it?
2 Answers
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Search and replace in bash using regular expressions
...NNNXNNXNNNNXXXXXXNNNNNXXX
Note that the subsequent -e's are processed in order. Also, the g flag for the expression will match all occurrences in the input.
You can also pick your favorite tool using this method, i.e. perl, awk, e.g.:
echo "$MYVAR" | perl -pe 's/[a-zA-Z]/X/g and s/[0-9]/N/g'
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How do you implement a good profanity filter?
...ies, and situations where the input text can potentially contain profanity or undesirable language. Oftentimes this needs to be filtered out.
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