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Usages of Null / Nothing / Unit in Scala
...ability to express variance in type parameters."). From the article you linked to:
One other use of Nothing is as a return type for methods that never
return. It makes sense if you think about it. If a method’s return
type is Nothing, and there exists absolutely no instance of Nothing,
t...
What are all the different ways to create an object in Java?
Had a conversation with a coworker the other day about this.
22 Answers
22
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How do I close a single buffer (out of many) in Vim?
...hanges are
lost.
The file remains unaffected.
If you know what you're doing, you can also use :bw
:bw
Like |:bdelete|, but really delete the
buffer.
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Bash command to sum a column of numbers [duplicate]
... that I can pipe into that will sum a column of numbers. I just want a quick one liner that will do something essentially like this:
...
git: How do I get the latest version of my code?
...
If you don't care about any local changes (including untracked or generated files or subrepositories which just happen to be here) and just want a copy from the repo:
git reset --hard HEAD
git clean -xffd
git pull
Again, this will nuke any changes you've made locally so use carefu...
SQLAlchemy default DateTime
...
DateTime doesn't have a default key as an input. The default key should be an input to the Column function. Try this:
import datetime
from sqlalchemy import Column, Integer, DateTime
from sqlalchemy.ext.declarative import declarative_base
Base = declarati...
How does the main() method work in C?
I know there are two different signatures to write the main method -
9 Answers
9
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How do I filter query objects by date range in Django?
I've got a field in one model like:
7 Answers
7
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How to use OpenFileDialog to select a folder?
... DialogResult result = fbd.ShowDialog();
if (result == DialogResult.OK && !string.IsNullOrWhiteSpace(fbd.SelectedPath))
{
string[] files = Directory.GetFiles(fbd.SelectedPath);
System.Windows.Forms.MessageBox.Show("Files found: " + files.Length.ToString(), "Message...
Simplest two-way encryption using PHP
...ed since 2007.
There is even an RFC to remove Mcrypt from PHP - https://wiki.php.net/rfc/mcrypt-viking-funeral
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