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Which @NotNull Java annotation should I use?
...3305ecd1b415e2ab1b9ef8a9120b4
javax.validation.constraints from validation-api-1.0.0.GA-sources.jar
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How to write a Unit Test?
...node2_1));
These are the imports that I added:
import org.junit.jupiter.api.Assertions;
import org.junit.jupiter.api.Test;
This is the test that I wrote:
You can check your methods like below:
Assertions.assertEquals(<Expected>,<actual>);
Assertions.assertTrue(<actual>);
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Using setImageDrawable dynamically to set image in an ImageView
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This works, at least in Android API 15
ImageView = imgv;
Resources res = getResources(); // need this to fetch the drawable
Drawable draw = res.getDrawable( R.drawable.image_name_in_drawable );
imgv.setImageDrawable(draw);
You could use setImageResource(...
How to handle Handler messages when activity/fragment is paused
...s.
Another advantage is that this approach is compatible with any Android API version, since BroadcastReceivers and Intents have been introduced on API level 1.
Your are not required to setup any special permissions on your app's manifest file except if you plan to use sendStickyBroadcast(where yo...
How to store values from foreach loop into an array?
...me are null? We have a similar situation where records are coming form an API, and somehow we are ending up with some null records in the array.
– pixelwiz
Apr 16 '18 at 15:34
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How to access java-classes in the default-package?
...nically you can, as shown in Sharique Abdullah's answer through reflection API, but classes from the unnamed namespace are not in scope in an import declaration)
Prior to J2SE 1.4 you could import classes from the default package using a syntax like this:
import Unfinished;
That's no longer allowed...
How to document Ruby code?
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Rails has some API Documentation Guidelines. That's probably a good starting point.
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When to use references vs. pointers
...de when it is more-or-less appropriate to use references or pointers in an API?
17 Answers
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How to get the return value from a thread in python?
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In Python 3.2+, stdlib concurrent.futures module provides a higher level API to threading, including passing return values or exceptions from a worker thread back to the main thread:
import concurrent.futures
def foo(bar):
print('hello {}'.format(bar))
return 'foo'
with concurrent.futur...
How to convert a char array back to a string?
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@corsiKa I did not say, that the String API is all good and golden. Only that it won't change in an incompatible way and that the class itself and its constructors won't go anywhere. :-)
– A.H.
Mar 15 '13 at 17:58
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