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Avoiding instanceof in Java
Having a chain of "instanceof" operations is considered a "code smell". The standard answer is "use polymorphism". How would I do it in this case?
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Best way to alphanumeric check in JavaScript
What is the best way to perform an alphanumeric check on an INPUT field in JSP ? I have attached my current code
10 Answ...
How do I get the information from a meta tag with JavaScript?
... error.
– bgmCoder
Jan 14 '16 at 22:32
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How do I find the location of my Python site-packages directory?
...ysconfig module instead:
python3 -c 'import sysconfig; print(sysconfig.get_paths()["purelib"])'
The per user site-packages directory (PEP 370) is where Python installs your local packages:
python -m site --user-site
If this points to a non-existing directory check the exit status of Python and ...
Determine function name from within that function (without using traceback)
...t want to play with the stack yourself, you should either use "bar" or bar.__name__ depending on context.
The given rejection notice is:
This PEP is rejected. It is not clear how it should be implemented or what the precise semantics should be in edge cases, and there aren't enough important us...
Does use of final keyword in Java improve the performance?
...(at compile time).
public class FinalTest {
public static final int N_ITERATIONS = 1000000;
public static String testFinal() {
final String a = "a";
final String b = "b";
return a + b;
}
public static String testNonFinal() {
String a = "a";
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Creating a new empty branch for a new project
...a start point.
– Brice
Apr 11 at 19:32
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show 1 more comment
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Class JavaLaunchHelper is implemented in both. One of the two will be used. Which one is undefined [
... Application Project on Eclipse Kepler on Mac OS X with java version "1.7.0_45"
2 Answers
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Regex, every non-alphanumeric character except white space or colon
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answered Jul 16 '15 at 11:32
Vasyl GutnykVasyl Gutnyk
4,29922 gold badges2727 silver badges3333 bronze badges
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How to add an extra column to a NumPy array
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np.r_[ ... ] and np.c_[ ... ]
are useful alternatives to vstack and hstack,
with square brackets [] instead of round ().
A couple of examples:
: import numpy as np
: N = 3
: A = np.eye(N)
: np.c_[ A, np.ones(N) ] #...