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Big-oh vs big-theta [duplicate]
It seems to me like when people talk about algorithm complexity informally, they talk about big-oh. But in formal situations, I often see big-theta with the occasional big-oh thrown in.
I know mathematically what the difference is between the two, but in English, in what situation would using big-oh...
How to change Android Studio's editor font?
... something else. I go into Editor > Colors & Fonts > Font but all the options are greyed out. For Editor Font it shows Show only monospaced fonts as checked with Primary font as Monospaced, but neither of these can be changed. I tried changing the font under Appearance but tha...
Android Camera Preview Stretched
...
public class CameraPreview extends SurfaceView implements SurfaceHolder.Callback {
private static final String TAG = "CameraPreview";
private Context mContext;
private SurfaceHolder mHolder;
private Camera mCamera;
private List<Camera.Size> mSupportedPreviewSizes;
p...
What is the difference between D3 and jQuery?
...jQuery you directly manipulate elements, but with D3 you provide data and callbacks through D3's unique data(), enter() and exit() methods and D3 manipulates elements.
D3 is usually used for data visualization but jQuery is used for creating web apps. D3 has many data visualization extensions and jQ...
Why is the Windows cmd.exe limited to 80 characters wide?
...(even in the days of 128mb machines and the one time you need it, you'll REALLY be glad you set it before hand. The width is a personal preference, I don't like seeing line wraps from my compiler except under extreme conditions, but others don't ever like to scroll.
– Bill K
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Is it possible to read the value of a annotation in java?
...ation and if the annotation policy retains the annotation at runtime. Naturally if the retention policy doesn't keep the annotation at runtime, you won't be able to query it at runtime.
An answer that's since been deleted (?) provided a useful link to an annotations tutorial that you may find helpf...
Is there a use-case for singletons with database access in PHP?
...bsolutely sure that you'll never have more than one instance of, you eventually have a second. You may end up with a second monitor, a second database, a second server--whatever.
When this happens, if you have used a static class you're in for a much worse refactor than if you had used a singleton...
What are the relationships between Any, AnyVal, AnyRef, Object and how do they map when used in Java
I usually end up trying every combination until it compiles. Can somebody explain what I should use where?
3 Answers
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Single Line Nested For Loops
...ertools.product, which returns an iterable yielding tuples of values from all the iterables you pass it. That is, itertools.product(A, B) yields all values of the form (a, b), where the a values come from A and the b values come from B. For example:
import itertools
A = [50, 60, 70]
B = [0.1, 0.2...
SQL “select where not in subquery” returns no results
... FROM table1 t1
)
When table1.common_id is not nullable, all these queries are semantically the same.
When it is nullable, NOT IN is different, since IN (and, therefore, NOT IN) return NULL when a value does not match anything in a list containing a NULL.
This may be confusing bu...
