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Empty set literal?
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You mean there is no literal syntax for the empty set? Or for sets in general?
– Johan Råde
May 25 '11 at 20:23
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What do the makefile symbols $@ and $< mean?
...ific situations such as arguments to linkers where
duplicate values have meaning.
$*: The stem of the target filename. A stem is typically a filename
without its suffix. Its use outside of pattern rules is
discouraged.
In addition, each of the above variables has two variants for
c...
What are the differences between a clustered and a non-clustered index?
...n index read AND THEN the table read. It's faster to range scan (if that's meaningful) because the data is stored in order. i.e. the clustering factor is perfect.
– Stephanie Page
Apr 27 '12 at 2:52
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What is the colon operator in Ruby?
...agically made into constants. Alternatively, you can consider the colon to mean "the thing named", so :id is "the thing named id".
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How to customize a Spinner in Android
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in the first code snipped do you mean android:height="1dp" in line 6?
– Willi Mentzel
Jun 29 '16 at 13:25
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Actual meaning of 'shell=True' in subprocess
...nd tell it to run the command. In other words, using an intermediate shell means that variables, glob patterns, and other special shell features in the command string are processed before the command is run. Here, in the example, $HOME was processed before the echo command. Actually, this is the cas...
How to prevent custom views from losing state across screen orientation changes
...y and not assigning unique ids.
The link shared by mato will work, but it means none of the individual Views manage their own state - the entire state is saved in the ViewGroup methods.
The problem is that when multiple of these ViewGroups are added to a layout, the ids of their elements from the ...
What does “xmlns” in XML mean?
...p://schemas.android.com/apk/res/android:foo /> with regards to what it "means" when an XML parser reads the document.
NOTE: You cannot actually use the full namespace URI in place of the namespace prefix in an XML instance document.
Check out this tutorial on namespaces: http://www.sitepoint.c...
How to get package name from anywhere?
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If with the word "anywhere" you mean without having an explicit Context (for example from a background thread) you should define a class in your project like:
public class MyApp extends Application {
private static MyApp instance;
public static M...
Maven is not working in Java 8 when Javadoc tags are incomplete
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DocLint is a new feature in Java 8, which is summarized as:
Provide a means to detect errors in Javadoc comments early in the
development cycle and in a way that is easily linked back to the
source code.
This is enabled by default, and will run a whole lot of checks before generating Java...