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How does HashSet compare elements for equality?
...ng instead of just equality comparisons, you should use SortedSet<T> from .NET 4 - which allows you to specify an IComparer<T> instead of an IEqualityComparer<T>. This will use IComparer<T>.Compare - which will delegate to IComparable<T>.CompareTo or IComparable.Compare...
Clearing a string buffer/builder after loop
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I think the performance benefit comes from the string mutability, not from saving the instantiation. here's a quick test of 1e8 iterations: inside loop (2.97s): ideone.com/uyyTL14w, outside loop (2.87s): ideone.com/F9lgsIxh
– Mark Elliot
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Android 'Unable to add window — token null is not for an application' exception
...ield:
this.getActivity().getParent()
and it works fine for me. This was from a class which extends from "Fragment":
public class filtro extends Fragment{...
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Good examples using java.util.logging [closed]
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java.util.logging keeps you from having to tote one more jar file around with your application, and it works well with a good Formatter.
In general, at the top of every class, you should have:
private static final Logger LOGGER = Logger.getLogger( C...
Right align text in android TextView
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In general, android:gravity="right" is different from android:layout_gravity="right".
The first one affects the position of the text itself within the View, so if you want it to be right-aligned, then layout_width= should be either "fill_parent" or "match_parent".
The se...
Long press on UITableView
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How do you prevent the table view from navigating into the cell (if you have 'didSelectRowAtIndexPath' implemented?)
– Marchy
Sep 15 '16 at 17:45
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How can I match a string with a regex in Bash?
...p on BSD tar to explicitly tell it to automatically infer compression type from extension. GNU tar will not do it automatically otherwise, and I'm guessing from @GoodPerson 's comment that BSD tar does do it by default.
– Mark K Cowan
Apr 7 '17 at 19:42
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What exactly is an Assembly in C# or .NET?
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Assemblies are distinct from the files that contain them.
– Greg D
Sep 1 '09 at 13:16
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JavaScript: clone a function
...modern ( >=iE9 ) feature of JavaScript (with a compatibility workaround from MDN)
Notes
It does not clone the function object additional attached properties, including the prototype property. Credit to @jchook
The new function this variable is stuck with the argument given on bind(), even on ne...
Contains method for a slice
...thod is trivial to write, and mkb gave you a hint to use the binary search from the sort package. But if you are going to do a lot of such contains checks, you might also consider using a map instead.
It's trivial to check if a specific map key exists by using the value, ok := yourmap[key] idiom. S...