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Static nested class in Java, why?
I was looking at the Java code for LinkedList and noticed that it made use of a static nested class, Entry .
14 Answers
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Xcode stuck at “Your application is being uploaded”
I am facing an issue while submitting my app from Xcode to the App Store. I have done everything regarding my project, and its running fine on my iPhone and iPad. But when I submit my project I am facing a huge problem.
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Computed / calculated / virtual / derived columns in PostgreSQL
...computed columns" of SQL Server.
STORED generated columns are introduced with Postgres 12. Trivial example:
CREATE TABLE tbl (
int1 int
, int2 int
, product bigint GENERATED ALWAYS AS (int1 * int2) STORED
);
db<>fiddle here
VIRTUAL generated columns may come with one of the next i...
What does “%” (percent) do in PowerShell?
It seems that the % operation starts script blocks after the pipeline, although about_Script_Blocks indicates the % isn't necessary.
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What is a JavaBean exactly?
I understood, I think, that a "Bean" is a Java class with properties and getters/setters. As much as I understand, it is the equivalent of a C struct. Is that true?
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How to fix java.net.SocketException: Broken pipe?
...mmons http client to call url using post method to post the parameters and it is throwing the below error rarely.
10 Answe...
Replace multiple strings with multiple other strings
I'm trying to replace multiple words in a string with multiple other words. The string is "I have a cat, a dog, and a goat."
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Retrieve list of tasks in a queue in Celery
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EDIT: See other answers for getting a list of tasks in the queue.
You should look here:
Celery Guide - Inspecting Workers
Basically this:
from celery.app.control import Inspect
# Inspect all nodes.
i = Inspect()
# Show the...
How do I tar a directory of files and folders without including the directory itself?
...ar -zcvf ../my_dir.tgz . && cd -
should do the job in one line. It works well for hidden files as well. "*" doesn't expand hidden files by path name expansion at least in bash. Below is my experiment:
$ mkdir my_directory
$ touch my_directory/file1
$ touch my_directory/file2
$ touch my_d...
How to cast List to List
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you can always cast any object to any type by up-casting it to Object first. in your case:
(List<Customer>)(Object)list;
you must be sure that at runtime the list contains nothing but Customer objects.
Critics say that such casting indicates something wrong with your co...