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In Objective-C why should I check if self = [super init] is not nil?
... not hell bent on not following best practices. I would, however, like to know why they are best practises in the first place. Its like being told to jump off a tower. You don't just go ahead and do it unless you know why. Is there a big, soft pillow to land on at the bottom, with a massive cash rew...
What Haskell representation is recommended for 2D, unboxed pixel arrays with millions of pixels?
...utorial on the use of repa, which is a good place to start if you already know Haskell arrays, or the vector library. The key stepping stone is the use of shape types instead of simple index types, to address multidimensional indices (and even stencils).
The repa-io package includes support for rea...
Difference between JVM and HotSpot?
... implementation of the JVM concept. It was originally developed by Sun and now it is owned by Oracle. There are other implementations of the JVM specification, like JRockit, IBM J9, among many others.
See List of Java Virtual Machine Implementations
The OpenJDK is a project under which an opensou...
How to create abstract properties in python abstract classes
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Since Python 3.3 a bug was fixed meaning the property() decorator is now correctly identified as abstract when applied to an abstract method.
Note: Order matters, you have to use @property before @abstractmethod
Python 3.3+: (python docs):
class C(ABC):
@property
@abstractmethod
...
How can I copy the output of a command directly into my clipboard?
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I know the comment is 5 years old, but in case someone stumbles on to this in the future, to use with command output, do git merge-base master some-branch | pbcopy
– Sam
Dec 31 '19 at 17:33...
Does the GitHub traffic graph include your own views?
... found this SO article via Google. Asked GitHub support and they said just now that this is still the case: "That Stack Overflow answer is still correct. Your own views are counted on repository traffic graphs, and there is no way to filter out your own page views of those of other repository contr...
How to implement history.back() in angular.js
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I've changed the example a bit. Now there are two buttons (back and forward). It uses jQuery now, which means scope.$apply() is needed on click.
– asgoth
Dec 28 '12 at 14:24
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How to convert ActiveRecord results into an array of hashes
...rds = TaskStoreStatus.all
tasks_records = tasks_records.as_json
# You can now add new records and return the result as json by calling `to_json`
tasks_records << TaskStoreStatus.last.as_json
tasks_records << { :task_id => 10, :store_name => "Koramanagala", :store_region => "In...
API to automatically upload apk to Google Play? [closed]
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Does anyone know if the restriction of updating only preexistent apps still apply?
– Ricardo Pedroni
Jan 27 '15 at 19:49
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How to install packages offline?
...env2.
python -m virtualenv myenv2
cd myenv2
source bin/activate
cd -
ls
now you can go to your offline folder where your requirements.txt and tranferred_packages folder are in there. download the packages with following code and put all of them to tranferred_packages folder.
pip download -r requ...