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How to scale threads according to CPU cores?
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Option 1:
newWorkStealingPool from Executors
public static ExecutorService newWorkStealingPool()
Creates a work-stealing thread pool using all available processors as its target parallelism level.
With this API, you don't need to pass number of co...
Useful example of a shutdown hook in Java?
... do a graceful "reject all clients upon hitting Control-C" in terminal.
From the docs:
When the virtual machine begins its shutdown sequence it will start all registered shutdown hooks in some unspecified order and let them run concurrently. When all the hooks have finished it will then run a...
TemplateDoesNotExist - Django Error
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Could also result from not registering a dependency of DRF. In my case I had to add 'django_hstore', to INSTALLED_APPS.
– shacker
Jul 20 '16 at 18:31
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What does $$ mean in the shell?
... use a double dollar sign ( $$ ). This does produce a number that varies from time to time... but if you call it repeatedly, it returns the same number. (The solution is to just use the time.)
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Benefits of inline functions in C++?
...vial functions). As such, it could provoke paging and defeat optimizations from the compiler.
It slightly breaks your encapsulation because it exposes the internal of your object processing (but then, every "private" member would, too). This means you must not use inlining in a PImpl pattern.
It sli...
How to detect if a function is called as constructor?
... a new instance of* x when calling x as a constructor is indistinguishable from a pre-existing instance of x passed as this when calling x as a function, unless you assign a property to every new object created by x as it is constructed:
function x(y) {
var isConstructor = false;
if (this i...
Libraries do not get added to APK anymore after upgrade to ADT 22
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Quoting Streets of Boston from his adt-dev post:
When upgrading, the 'Order and Export' of the new 'Android Private
Libraries' is not always checked. And the android-support-v4.jar is now in
this 'Android Private Libraries' section.
To...
strdup() - what does it do in C?
...nd a lower case letter are reserved by the standard for future directions. From C11 7.1.3 Reserved identifiers:
Each header declares or defines all identifiers listed in its associated sub-clause, and *optionally declares or defines identifiers listed in its associated future library directions ...
A python class that acts like dict
...ant to write a custom class that behaves like dict - so, I am inheriting from dict .
9 Answers
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Block Declaration Syntax List
...^blockName) (var_type);
Blocks as Parameters
Note that this is distinct from "Blocks as Arguments"; in this instance, you're declaring a method that wants a block argument.
- (void)yourMethod:(return_type (^)(var_type))blockName;
Blocks as Arguments
Note that this is distinct from "Blocks as ...