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How to concatenate twice with the C preprocessor and expand a macro as in “arg ## _ ## MACRO”?
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Is there any way do to this with the traditional C preprocessor which does not have the token pasting operator ##?
Maybe, and maybe not — it depends on the preprocessor. One of the advantages of the standard preprocessor is that it has this facility which works reliably, whereas there were...
From io.Reader to string in Go
...t:
buf := new(bytes.Buffer)
buf.ReadFrom(yourReader)
s := buf.String() // Does a complete copy of the bytes in the buffer.
This copy is done as a protection mechanism. Strings are immutable. If you could convert a []byte to a string, you could change the contents of the string. However, go allows...
How to delete a localStorage item when the browser window/tab is closed?
... plan for. The fact that a language allows people to do destructive things doesn't mean you should adopt non-standard ways of using libraries as a defense against misuse of the language. If you or your fellow developers don't understand the difference between invocation and assignment, you have much...
Dynamically Changing log4j log level
...on the configuration will be read and used as setting the level at runtime does not persist the level change.
UPDATE: If you are using Log4j 2 you should remove the calls to setLevel per the documentation as this can be achieved via implementation classes.
Calls to logger.setLevel() or similar ...
How can I reverse the order of lines in a file?
... Just a note, because people have mentioned tac before, but tac doesn't appear to be installed on OS X. Not that it'd be difficult to write a substitute in Perl, but I don't have the real one.
– Chris Lutz
Apr 12 '09 at 21:49
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Is it safe to use -1 to set all bits to true?
...t highest value.
We are not talking about whether -1 has all bits one (it doesn't always have). And we're not talking about whether ~0 has all bits one (it has, of course).
But what we are talking about is what the result of the initialized flags variable is. And for it, only -1 will work with eve...
How to split one string into multiple variables in bash shell? [duplicate]
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If your solution doesn't have to be general, i.e. only needs to work for strings like your example, you could do:
var1=$(echo $STR | cut -f1 -d-)
var2=$(echo $STR | cut -f2 -d-)
I chose cut here because you could simply extend the code for...
What happens to a detached thread when main() exits?
... thread when main() exits" is:
It continues running (because the standard doesn't say it is stopped), and that's well-defined, as long as it touches neither (automatic|thread_local) variables of other threads nor static objects.
This appears to be allowed to allow thread managers as static objects...
Uint8Array to string in Javascript
... return out;
}
It's somewhat cleaner as the other solutions because it doesn't use any hacks nor depends on Browser JS functions, e.g. works also in other JS environments.
Check out the JSFiddle demo.
Also see the related questions: here and here
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EF Migrations: Rollback last applied migration?
...Manual Migration you need to roll back to, but realized your "Down" method doesn't really roll things back properly, you can just edit and save it, then rerun update-database -target... until it rolls back properly. Modifying the Manual Migration after the fact - after you've already applied it - do...