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How to unit test abstract classes: extend with stubs?
... then become implementations of this new interface.
This means you can now test your previously abstract class using a mock instance of the new interface, and each new implementation through the now public interface. Everything is simple and testable.
Solution For 2
If you have the second si...
What is an optional value in Swift?
...String are completely different types.
Here's the most important thing to know: An optional is a kind of container. An optional String is a container which might contain a String. An optional Int is a container which might contain an Int. Think of an optional as a kind of parcel. Before you open it ...
Is there a good reason to use upper case for SQL keywords? [closed]
...itors didn't do code colouring.
I used to prefer all upper case, but I'm now leaning towards all lower.
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Where and why do I have to put the “template” and “typename” keywords?
... my C++11 answer)
In order to parse a C++ program, the compiler needs to know whether certain names are types or not. The following example demonstrates that:
t * f;
How should this be parsed? For many languages a compiler doesn't need to know the meaning of a name in order to parse and basicall...
Determine when a ViewPager changes pages
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ViewPager.setOnPageChangeListener is deprecated now. You now need to use ViewPager.addOnPageChangeListener instead.
for example,
viewPager.addOnPageChangeListener(new ViewPager.OnPageChangeListener() {
@Override
public void onPageScrolled(int position, fl...
How do you run CMD.exe under the Local System Account?
...exe.
When explorer is launched notice the name "system" in start menu bar. Now you can delete some files in system32 directory which as admin you can't delete or as admin you would have to try hard to change permissions to delete those files.
Users who try to rename or deleate System files in any ...
Android and setting alpha for (image) view alpha
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@Antonio Done. I made my answer now super-duper-over-verbose ;-)
– sschuberth
Nov 21 '16 at 14:42
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Android: upgrading DB version and adding new table
I've already created sqlite tables for my app, but now I want to add a new table to the database.
5 Answers
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Stacked Tabs in Bootstrap 3
...the official Bootstrap documentation as to how you should be handling this now under JavaScript / Tabs. See also, this tutorial on how to use the Bootstrap 3 setup properly to do vertical tabs. tutsme-webdesign.info/bootstrap-3-toggable-tabs-and-pills
– Neil Monroe
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Extract date (yyyy/mm/dd) from a timestamp in PostgreSQL
...estamp;
timestamp
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2010-01-01 12:00:00
Now we'll cast it to a date:
wconrad=# select '2010-01-01 12:00:00'::timestamp::date;
date
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2010-01-01
On the other hand you can use date_trunc function. The difference between them is that the latter ...