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What is a NullReferenceException, and how do I fix it?
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What is the cause?
Bottom Line
You are trying to use something that is null (or Nothing in VB.NET). This means you either set it to null, or you never set it to anything at all.
Like anything else, null gets passed around. If it is null in meth...
How to prevent http file caching in Apache httpd (MAMP)
I am developing a single page Javascript application in MAMP. My JavaScript and HTML template files are getting cached between requests.
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Chained method calls indentation style in Python [duplicate]
... line continuation character is preferred to open parentheses.
ShortName.objects.distinct() \
.filter().values() # looks better
The need for this style becomes more obvious as method names get longer and as methods start taking arguments:
return some_collection.get_objects(locator=...
Accessing Object Memory Address
When you call the object.__repr__() method in Python you get something like this back:
9 Answers
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Reverse Y-Axis in PyPlot
I have a scatter plot graph with a bunch of random x, y coordinates. Currently the Y-Axis starts at 0 and goes up to the max value. I would like the Y-Axis to start at the max value and go up to 0.
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Convert String array to ArrayList [duplicate]
...a.util.Arrays;
import java.util.List;
import java.util.ArrayList;
public class StringArrayTest {
public static void main(String[] args) {
String[] words = {"ace", "boom", "crew", "dog", "eon"};
List<String> wordList = Arrays.asList(words);
for (String e : w...
Creating threads - Task.Factory.StartNew vs new Thread()
I am just learning about the new Threading and Parallel libraries in .Net 4
4 Answers
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Lambda Expression and generic method
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You can't use a lambda expression for a functional interface, if the method in the functional interface has type parameters. See section §15.27.3 in JLS8:
A lambda expression is compatible [..] with a target type T if T is a functional int...
Determining memory usage of objects? [duplicate]
I'd like to work out how much RAM is being used by each of my objects inside my current workspace. Is there an easy way to do this?
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git: switch branch without detaching head
I have a repository on github with a main branch (master) and a branch for some experimental work. I made some commits and pushed to the experimental branch and everything was fine.
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