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Get visible items in RecyclerView
I need to know which elements are currently displayed in my RecyclerView. There is no equivalent to the OnScrollListener.onScroll(...) method on ListViews. I tried to work with View.getGlobalVisibleRect(...) , but that hack is too ugly and does not always work too.
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Where is the Keytool application?
...ew control in android and I can't seem to understand how to run keytool .
Is it installed with eclipse? I can't seem to find a download link.
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Is it more efficient to copy a vector by reserving and copying, or by creating and swapping? [duplic
...t> new_;
new_.swap(original);
}
That would work, but an easier way is
vector<int> new_(original);
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How do the post increment (i++) and pre increment (++i) operators work in Java?
Can you explain to me the output of this Java code?
14 Answers
14
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What is the difference between ArrayList.clear() and ArrayList.removeAll()?
Assuming that arraylist is defined as ArrayList<String> arraylist , is arraylist.removeAll(arraylist) equivalent to arraylist.clear() ?
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Recursion or Iteration?
Is there a performance hit if we use a loop instead of recursion or vice versa in algorithms where both can serve the same purpose? Eg: Check if the given string is a palindrome.
I have seen many programmers using recursion as a means to show off when a simple iteration algorithm can fit the bill.
D...
What are the differences between Chosen and Select2?
... loaded as option tags in the DOM, which limits it to working with
small-ish datasets. Select2 uses a function to find results
on-the-fly, which allows it to partially load results.
Paging of results: Since Select2 works with large datasets and only loads a small amount of matching results at ...
Logging best practices [closed]
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Update: For extensions to System.Diagnostics, providing some of the missing listeners you might want, see Essential.Diagnostics on CodePlex (http://essentialdiagnostics.codeplex.com/)
Frameworks
Q: What frameworks do you use?
A: System.Diagnostics.TraceSource, built in to .NET 2.0.
It p...
Fatal error: unexpectedly found nil while unwrapping an Optional values [duplicate]
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Almost certainly, your reuse identifier "title" is incorrect.
We can see from the UITableView.h method signature of dequeueReusableCellWithIdentifier that the return type is an Implicitly Unwrapped Optional:
func dequeueReusableCellWithIdentifier(identifier: String!) -&g...
Is 1.0 a valid output from std::generate_canonical?
... documention on cppreference.com of std::generate_canonical confirms this.
3 Answers
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