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Javascript: best Singleton pattern [duplicate]
...s. So, if you distribute a script/library it will gracefully handle misuse by others who use it. Most of Google's API libraries do this for just that reason. Say I use Google Maps on a site, but want to install a widget by some third party which also includes the maps library explicitly. Should I ha...
How to create a self-signed certificate with OpenSSL
...previously. If you need more security, you should use a certificate signed by a certificate authority (CA).
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What is an API key? [closed]
...depends very much on who issues it, and what services it's being used for. By and large, however, an API key is the name given to some form of secret token which is submitted alongside web service (or similar) requests in order to identify the origin of the request. The key may be included in some d...
What are the differences between LinearLayout, RelativeLayout, and AbsoluteLayout?
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LinearLayout means you can align views one by one (vertically/ horizontally).
RelativeLayout means based on relation of views from its parents and other views.
ConstraintLayout is similar to a RelativeLayout in that it uses relations to position and size widgets, bu...
In Maven 2, how do I know from which dependency comes a transitive dependency?
... then there is a graphical version of dependency tree where you can filter by scope etc.
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How do I convert from stringstream to string in C++?
...lying string object.
1) Returns a copy of the underlying string as if by calling rdbuf()->str().
2) Replaces the contents of the underlying string as if by calling rdbuf()->str(new_str)...
Notes
The copy of the underlying string returned by str is a temporary object that wi...
How can I change a secret Gist to public?
... URL for your Gist will never change, just its visibility.
As commented by GiDo though, since 2016:
you can only make public a gist that was previously private.
When it is public it will stay public.
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Is there a benefit to defining a class inside another class in Python?
...that you can accomplish exactly the same (perhaps in a less confusing way) by using a module.
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Deep null checking, is there a better way?
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I got inspired by this question to try and find out how this kind of deep null checking can be done with an easier / prettier syntax using expression trees. While I do agree with the answers stating that it might be a bad design if you ofte...
Hibernate throws org.hibernate.AnnotationException: No identifier specified for entity: com..domain.
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Using a wrapper type is a better choice when using Hibernate because, by checking if the id is null or not, Hibernate can better determine if an entity is transient (it does not have an associated table row) or detached (it has an associated table row, but it's not managed by the current Persis...