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What does “&” at the end of a linux command mean?
...s will not stay alive after the shell session is closed. SIGHUP terminates all running processes. By default anyway. If your command is long-running or runs indefinitely (ie: microservice) you need to pr-pend it with nohup so it remains running after you disconnect from the session:
nohup sh my_scr...
Insert string at specified position
...ing, $put, $position) ); //RESULT: My dog don't love postman
This is a small powerful function that performs its job flawlessly.
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Is background-color:none valid CSS?
...nswered Jan 5 '12 at 8:42
James AllardiceJames Allardice
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Why are there two kinds of functions in Elixir?
...rts with a clean slate and you don't get the variables of different scopes all mixed up together. You have a clear boundary.
We could retrieve the named hello function above as an anonymous function. You mentioned it yourself:
other_function(&hello(&1))
And then you asked, why I cannot s...
Actionbar notification count icon (badge) like Google has
...nflated from XML again. So, the whole setNotifCount(...) is useless. Just call setText(...) on the badge. And you can cast getActionView() to Button directly.
– caw
Mar 1 '14 at 15:30
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Does Swift have access modifiers?
...Enable an entity to be used outside the defining module (target). You typically use open or public access when specifying the public interface to a framework.
However, open access applies only to classes and class members, and it differs from public access as follows:
public classes and class mem...
What is the difference between mutex and critical section?
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Mutexes can be shared between processes, but always result in a system call to the kernel which has some overhead.
Critical sections can only be used within one process, but have the advantage that they only switch to kernel mode in the case of contention - Uncontended acquires, which should be ...
iOS multiline label in Interface builder
...orks when I am writing the label, but when I press enter to accept it just all goes on one line.
– Samuli Lehtonen
Jul 2 '11 at 14:30
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Why do some claim that Java's implementation of generics is bad?
I've occasionally heard that with generics, Java didn't get it right. (nearest reference, here )
13 Answers
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Covariance, Invariance and Contravariance explained in plain English?
... say it is used to decide whether a method is overwritten or overloaded.
All of the above.
At heart, these terms describe how the subtype relation is affected by type transformations. That is, if A and B are types, f is a type transformation, and ≤ the subtype relation (i.e. A ≤ B means that ...