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In pure functional languages, is there an algorithm to get the inverse function?
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In some cases, yes! There's a beautiful paper called Bidirectionalization for Free! which discusses a few cases -- when your function is sufficiently polymorphic -- where it is possible, completely automatically to derive an inverse function. (It also discusses what makes...
Get visible items in RecyclerView
...ildAt() to get each visible child, and setting some tag convertview.setTag(index) on these view in adapter code will help you to relate it with adapter data.
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How to store int[] array in application Settings
.... And requires no additional functions or wrappers.
The thing is, that VS allows to serialize int[] type by default in the settings file - it just doesn't allow you to select it by default.
So, create a setting with desired name (e.g. SomeTestSetting) and make it of any type (e.g. string by default...
typedef fixed length array
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@sh1: On all modern real-world ABIs I'm aware of - even ones where misaligned access is very expensive - structures don't get stronger alignment requirements than their members would have without the structure. Of course OP or anyone ...
How do I use extern to share variables between source files?
...ler is informed that a
variable exists (and this is its type); it does not allocate the
storage for the variable at that point.
A variable is defined when the compiler allocates the storage for
the variable.
You may declare a variable multiple times (though once is sufficient);
you may only defin...
Can't get Gulp to run: cannot find module 'gulp-util'
On Windows 7, I've installed gulp as explained here: http://markgoodyear.com/2014/01/getting-started-with-gulp/ :
10 Answe...
getViewTypeCount and getItemViewType methods of ArrayAdapter
...urn 0 or 1 or 2 from the getItemViewType() method, like a zero-based array index. And as you have three types of views used,
your getViewTypeCount() method must return 3.
In any case if you return any other integer values like 1, 2, 3 or 111, 222, 333 for this method you definitely might experience...
How do I check which version of NumPy I'm using?
...c Rodger: yeah, but your is more general to any module that cares to set a __version__.
– Esteban Küber
Oct 5 '09 at 14:13
57
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How to optimize for-comprehensions and loops in Scala?
...s Java. I'm revisiting some Project Euler problems in Scala that I originally tackled in Java. Specifically Problem 5: "What is the smallest positive number that is evenly divisible by all of the numbers from 1 to 20?"
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Can JSON start with “[”?
...e to get back a JSONArray object and then you can use get(i) where i is an index from 0 through the returned JSONArray's size()-1.
import java.io.IOException;
import com.ibm.json.java.JSONArray;
import com.ibm.json.java.JSONObject;
public class BookListTest {
public static void main(String[] ar...