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How would you implement an LRU cache in Java?
Please don't say EHCache or OSCache, etc. Assume for purposes of this question that I want to implement my own using just the SDK (learning by doing). Given that the cache will be used in a multithreaded environment, which datastructures would you use? I've already implemented one using LinkedHashM...
Send string to stdin
... above is the same as
cat <<EOF
This is coming from the stdin
EOF
or you can redirect output from a command, like
diff <(ls /bin) <(ls /usr/bin)
or you can read as
while read line
do
echo =$line=
done < some_file
or simply
echo something | read param
...
git: Apply changes introduced by commit in one repo to another repo
...but the latter is some kind of other branch ( repo1 is not maintained anymore).
4 Answers
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Force overwrite of local file with what's in origin repo?
I want to get the latest file that's in the repository, and overwrite what I have locally. How can I do this with the git client?
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Delete a closed pull request from GitHub
...what happened during development.
However, if there are critical reasons for deleting it (this is mainly violation of Github Terms of Service), Github support staff will delete it for you.
Whether or not they are willing to delete your PR for you is something you can easily ask them, just drop the...
How do I rename a Git repository?
git mv renames a file or directory in a repository. How do I rename the Git repository itself?
18 Answers
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How to call asynchronous method from synchronous method in C#?
...hat's not possible.
I have written a few types in my Nito.AsyncEx library for dealing with a partially-asynchronous code base. There's no solution that works in every situation, though.
Solution A
If you have a simple asynchronous method that doesn't need to synchronize back to its context, then you...
How do I use the new computeIfAbsent function?
...
Suppose you have the following code:
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
public class Test {
public static void main(String[] s) {
Map<String, Boolean> whoLetDogsOut = new ConcurrentHashMap<>();
whoL...
How is “int* ptr = int()” value initialization not illegal?
...
+1, the constant expression bit is important and missing from the top-2 upvoted answers.
– David Rodríguez - dribeas
Nov 9 '11 at 16:43
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What's Alternative to Singleton
We have a class that holds configuration information for the application. It used to be a singleton. After some architectural review, we were told to remove the singleton. We did see some benefits of not using singleton in the unit testing because we can test different configurations all at once.
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