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Which is better, return value or out parameter?
If we want to get a value from a method, we can use either return value, like this:
17 Answers
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CharSequence VS String in Java?
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But keep in mind this caveat from the CharSequence javadoc: This interface does not refine the general contracts of the equals and hashCode methods. The result of comparing two objects that implement CharSequence is therefore, in general, undefined. Each...
In a Git repository, how to properly rename a directory?
...):
git mv <old name> <new name>
Case sensitive rename—eg. from casesensitive to CaseSensitive—you must use a two step:
git mv casesensitive tmp
git mv tmp CaseSensitive
(More about case sensitivity in Git…)
…followed by commit and push would be the simplest way to rename a...
What's an Aggregate Root?
...itory pattern, aggregate roots are the only objects your client code loads from the repository.
The repository encapsulates access to child objects - from a caller's perspective it automatically loads them, either at the same time the root is loaded or when they're actually needed (as with lazy loa...
SparseArray vs HashMap
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//but can be copied from Android source code
In terms of memory, here is an example of SparseIntArray vs HashMap<Integer, Integer> for 1000 elements:
SparseIntArray:
class SparseIntArray {
int[] keys;
int[] values;
int si...
Python, Unicode, and the Windows console
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Note: This answer is sort of outdated (from 2008). Please use the solution below with care!!
Here is a page that details the problem and a solution (search the page for the text Wrapping sys.stdout into an instance):
PrintFails - Python Wiki
Here's a code exc...
Why git can't do hard/soft resets by path?
...for a path, replacing both the index and the working tree with the version from the HEAD commit.
– Dan Fabulich
Oct 5 '12 at 8:18
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What is the difference between Integer and int in Java?
... and therefore doesn't have any methods.
Integer is a class, no different from any other in the Java language. Variables of type Integer store references to Integer objects, just as with any other reference (object) type. Integer.parseInt("1") is a call to the static method parseInt from class Inte...
Verifying signed git commits?
...the formatted tag object.
This allows callers to cross-check the tagname from refs/tags with
the tagname from the tag object header upon GPG verification.
Git 2.16 (Q1 2018) will allow the commit signature verification to be even more automated, with the merge.verifySignatures configuration ...
Get type of a generic parameter in Java with reflection
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I want to try to break down the answer from @DerMike to explain:
First, type erasure does not mean that the JDK eliminates type information at runtime. It's a method for allowing compile-time type checking and runtime type compatibility to coexist in the same la...