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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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Do sealed classes really offer performance Benefits?
...ization tips which say that you should mark your classes as sealed to get extra performance benefits.
12 Answers
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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 ...
Should I put #! (shebang) in Python scripts, and what form should it take?
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The shebang line in any script determines the script's ability to be executed like a standalone executable without typing python beforehand in the terminal or when double clicking it in a file manager (when configured properly). It isn't necessary but generally put there so when someone sees th...
Why can I use auto on a private type?
...auto are, for the most part, the same as for template type deduction. The example posted works for the same reason you can pass objects of private types to template functions:
template <typename T>
void fun(T t) {}
int main() {
Foo f;
fun(f.Baz()); // ok
}
And why can we pa...