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How to pass a function as a parameter in Java? [duplicate]
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Java 8 and above
Using Java 8+ lambda expressions, if you have a class or interface with only a single abstract method (sometimes called a SAM type), for example:
public interface MyInterface {
String doSomething(int param1, String param2);
}
then anywhere ...
How to deal with persistent storage (e.g. databases) in Docker
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docker volume rm $(docker volume ls -f dangling=true -q)
# Or using 1.13.x
docker volume prune
Docker 1.8.x and below
The approach that seems to work best for production is to use a data only container.
The data only container is run on a barebones image and actually does nothing except exposi...
What's the difference between parenthesis $() and curly bracket ${} syntax in Makefile?
Is there any differences in invoking variables with syntax ${var} and $(var) ? For instance, in the way the variable will be expanded or anything?
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How to compare software version number using js? (only number)
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How to pipe input to a Bash while loop and preserve variables after loop ends
... grouping operation and do not themselves create a subshell. In this context, they are part of a pipeline and are therefore run as a subshell, but it is because of the |, not the { ... }. You mention this in the question. AFAIK, you can do a return from within these inside a function.
Bash also ...
HTTP POST with URL query parameters — good idea or not? [closed]
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how about a post of an xml file to a url with query parameters? is that possible?
– OpenCoderX
Feb 2 '13 at 1:12
3
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Possible to iterate backwards through a foreach?
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When working with a list (direct indexing), you cannot do it as efficiently as using a for loop.
Edit: Which generally means, when you are able to use a for loop, it's likely the correct method for this task. Plus, for as much as foreach is implemented in-order...
Utility classes are evil? [closed]
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Utility classes aren't exactly evil, but they can violate the principles that compose a good object-oriented design. In a good object-oriented design, most classes should represent a single thing and all of its attributes and operations. If you are ...
How do I create a dictionary with keys from a list and values defaulting to (say) zero? [duplicate]
...k well.
Python 2.7 and above also support dict comprehensions. That syntax is {el:0 for el in a}.
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Do sealed classes really offer performance Benefits?
...ization tips which say that you should mark your classes as sealed to get extra performance benefits.
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