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How to get the first non-null value in Java?
...(i != null) return i;
return null;
}
For efficient reasons, you can handle the common cases as follows:
public static <T> T coalesce(T a, T b) {
return a == null ? b : a;
}
public static <T> T coalesce(T a, T b, T c) {
return a != null ? a : (b != null ? b : c);
}
public s...
How can I extract a predetermined range of lines from a text file on Unix?
...tract a certain section of this file (i.e. the data for a single database) and place it in a new file. I know both the start and end line numbers of the data that I want.
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Replace line break characters with in ASP.NET MVC Razor view
...espace.html has a good explanation of pre-line (I was only aware of nowrap and pre).
– James Skemp
Aug 12 '12 at 16:24
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Hidden Features of MySQL
...t have only just recently started to use MySQL with my web applications, and I'm hungry for knowledge.
20 Answers
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Should I put input elements inside a label element?
Is there a best practice concerning the nesting of label and input HTML elements?
14 Answers
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Android Hello-World compile error: Intellij cannot find aapt
I'm trying to get set up with an Android development environment using IntelliJ in Ubuntu 12.04. I create an Android Application Module, but when I try to build, I get the following error:
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How to get the second column from command output?
My command's output is something like:
8 Answers
8
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How to insert a text at the beginning of a file?
... lines?
$ sed -i '1,10s/^/<added text> /' file
Or you can use Command Grouping:
$ { echo -n '<added text> '; cat file; } >file.new
$ mv file{.new,}
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Run ssh and immediately execute command [duplicate]
I'm trying to find UNIX or bash command to run a command after connecting to an ssh server. For example:
3 Answers
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Bash script and /bin/bash^M: bad interpreter: No such file or directory [duplicate]
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I have seen this issue when creating scripts in Windows env and then porting over to run on a Unix environment.
Try running dos2unix on the script:
http://dos2unix.sourceforge.net/
Or just rewrite the script in your Unix env using vi and test.
Unix uses different line endings so ...