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What are the lesser known but useful data structures?
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Burst tries are also an interesting variant, where you use only a prefix of the strings as nodes and otherwise store lists of strings in the nodes.
– Torsten Marek
Feb 1 '09 at 19:16
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Getting value of public static final field/property of a class in Java via reflection
...ield f = R.class.getField("_1st");
Class<?> t = f.getType();
if(t == int.class){
System.out.println(f.getInt(null));
}else if(t == double.class){
System.out.println(f.getDouble(null));
}...
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What is the difference between gravity and layout_gravity in Android?
... See, I find this funny, because if I just go off the names, my intuition is the other way around. Every time, I think "layout_gravity" means "the gravity for how this ViewGroup lays out it's contents", and "gravity" is "where this View gravitates to".
– Ogre
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How do you programmatically set an attribute?
...) is equivalent to
``x.y = v''.
Edit: However, you should note (as pointed out in a comment) that you can't do that to a "pure" instance of object. But it is likely you have a simple subclass of object where it will work fine. I would strongly urge the O.P. to never make instances of object li...
InputStream from a URL
...p:// on the front of it it would be an HTTP URL, which is clearly what you intend here.
(b) FileInputStream is for files, not URLs.
(c) The way to get an input stream from any URL is via URL.openStream(), or URL.getConnection().getInputStream(), which is equivalent but you might have other reasons...
How to use conditional breakpoint in Eclipse?
I want to know how to place a conditional breakpoint in Eclipse. I have a code like:
4 Answers
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How does setting baselineAligned to false improve performance in LinearLayout?
I was just building some UI in xml, and Lint gave me a warning and said to set android:baselineAligned to false to improve performance in ListView.
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Order of member constructor and destructor calls
...shed, last poped. So, when instantiating your first instance, it is pushed into memory in order of a stack. Then, the second is pushed over, the third over the second and so forth. Then, when destroying your instances, the program shall look for the first to destroy, the last that has been pushed. ...
Determining the current foreground application from a background task or service
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EDIT TO THE ABOVE: Note: this method is only intended for debugging and presenting task management user interfaces. <-- Just spotted that in the Java doc. So this method might change without notice in the future.
– brandall
Mar ...
Count the items from a IEnumerable without iterating?
... source as ICollection<TSource>;
if (c != null)
return c.Count;
int result = 0;
using (IEnumerator<T> enumerator = source.GetEnumerator())
{
while (enumerator.MoveNext())
result++;
}
return result;
So it tries to cast to ICollection<T>, which has a Count property...