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Why does X[Y] join of data.tables not allow a full outer join, or a left join?
...quote from the data.table FAQ 1.11 What is the difference between X[Y] and merge(X, Y)?
X[Y] is a join, looking up X's rows using Y (or Y's key if it has one) as an index.
Y[X] is a join, looking up Y's rows using X (or X's key if it has one)
merge(X,Y) does both ways at the same time....
How to avoid .pyc files?
...e Python
interpreter, or by setting the
PYTHONDONTWRITEBYTECODE environment
variable before running the
interpreter. This setting is available
to Python programs as the
sys.dont_write_bytecode variable, and
Python code can change the value to
modify the interpreter’s behaviour.
U...
How to remove the first commit in git?
...
For me, the most secure way is to use the update-ref command:
git update-ref -d HEAD
It will delete the named reference HEAD, so it will reset (softly, you will not lose your work) all your commits of your current branch.
If ...
MongoDB - admin user not authorized
...My mongod.conf file is in the old compatibility format
(this is how it came with the installation).
15 Answers
...
Why we should not use protected static in java
...uestion Is there a way to override class variables in Java?
The first comment with 36 upvotes was:
8 Answers
...
Accessing MP3 metadata with Python [closed]
How can I retrieve mp3 metadata in Python?
16 Answers
16
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How can I create an object and add attributes to it?
...ttributes (including lambda functions). So, the following works:
obj = someobject
obj.a = lambda: None
setattr(obj.a, 'somefield', 'somevalue')
Whether the loss of clarity compared to the venerable Bunch recipe is OK, is a style decision I will of course leave up to you.
...
Inline SVG in CSS
...era 11.62 the gradient is black, in IE 9 and Firefox 12 it's white. In Chrome 19, it works UNLESS you specify the width/height of the SVG in % units. I'd say it's more of an oddity than a real feature. It's a cool find though.
– toniedzwiedz
May 26 '12 at 18:40...
Automapper - how to map to constructor parameters instead of property setters
...t; new ObjectTo(arg0, arg1, etc));
...
using AutoMapper;
using NUnit.Framework;
namespace UnitTests
{
[TestFixture]
public class Tester
{
[Test]
public void Test_ConstructUsing()
{
Mapper.CreateMap<ObjectFrom, ObjectTo>()
.Con...
How to modify a pull request on GitHub to change target branch to merge into?
I have a pull request that is requesting a merge into master from my branch, but the owner wants me to change the request to merge into a different branch from my branch.
...