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Referring to the null object in Python
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In Python, the 'null' object is the singleton None.
The best way to check things for "Noneness" is to use the identity operator, is:
if foo is None:
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Android Fragments. Retaining an AsyncTask during screen rotation or configuration change
I'm working on a Smartphone / Tablet app, using only one APK, and loading resources as is needed depending on screen size, the best design choice seemed to be using Fragments via the ACL.
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Must Dependency Injection come at the expense of Encapsulation?
...using an OO language as the 'host', but the ideas behind IoC come from component-oriented software engineering, not OO.
Component software is all about managing dependencies - an example in common use is .NET's Assembly mechanism. Each assembly publishes the list of assemblies that it references, a...
Dependency injection through constructors or property setters?
...of a class. You add a dependency and now all your users (subclasses and anyone instantiating you directly) suddenly know about it. That feels like a break of encapsulation.
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How to pattern match using regular expression in Scala?
...ld like to be able to find a match between the first letter of a word, and one of the letters in a group such as "ABC". In pseudocode, this might look something like:
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What is the difference between and ? [duplicate]
Both tags include the content from one page in another.
6 Answers
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How to make a Bootstrap accordion collapse when clicking the header div?
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this method doesn't work for iphone. per the answer to stackoverflow.com/questions/19866172/… it needs to be <a> (since it requires the href) in order for it to be collapsible on iphone... any ideas?
– minovsky
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Representing null in JSON
...the same as both "not undefined and not null", and if you were testing for one condition or the other, this might succeed whereas JSON1 would fail.
This is the definitive way to represent null per the JSON spec.
JSON3 {"myCount": 0}
In this case, myCount is 0. That's not the same as null, and it's ...
When to use inline function and when not to use it?
...y inlined. The degree of cleverness of a compiler cannot be legislated, so one compiler might generate 720, another 6 * fac(5), and yet another an un-inlined call fac(6).
To make inlining possible in the absence of unusually clever compilation and linking facilities, the definition–and not j...
What's the difference between backtracking and depth first search?
...of backtracking related to searching tree structures. From Wikipedia:
One starts at the root (selecting some node as the root in the graph case) and explores as far as possible along each branch before backtracking.
It uses backtracking as part of its means of working with a tree, but is limi...