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Adding a column to a data.frame
...1, 1 + cumsum(nonpos))
> classes
[1] 1 1 1 1 2 2 2 2 2 2 2 3 3 3 3
Now, we can attach it back onto our data frame with cbind (by using the class= syntax, we can give the column the class heading):
> data_w_classes <- cbind(data, class=classes)
And data_w_classes now contains the re...
Rails ActiveRecord date between
...
Day.where(:reference_date => 6.months.ago..Time.now) works, thanks
– boulder_ruby
Nov 5 '12 at 1:41
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Single huge .css file vs. multiple smaller specific .css files? [closed]
... maintain. Highly, highly recommended. I personally use Sass (SCSS syntax) now, but used LESS previously. Both are great, with similar benefits. Once you've written CSS with a compiler, it's unlikely you'd want to do without one.
http://lesscss.org
http://sass-lang.com
If you don't want to mess a...
How to sort git tags by version string order of form rc-X.Y.Z.W?
...be used as the default.
robinst comments:
the version sort order can now (Git 2.1+) be configured as default:
git config --global tag.sort version:refname
As noted by Leo Galleguillos in the comments:
To configure Git to show newest tags first (descending order), just add a hyphen bef...
unable to copy/paste in mingw shell
...ight click the icon on the top left hand corner of MINGW64:
Select Options
Now Select keys
On the right hand you will find Shortcuts
If not thicked, thick Copy and Paste
Now always remeber the instruction given to copy & paste as follows:
Copy: Ctrl+ Ins (insert)
i.e. To copy on MINGW, only h...
Bomb dropping algorithm
...e to prove we can be greedy in reducing the outer
perimeter.
But, we do know we can be greedy. Because no bomb in layer 2 can ever be more
efficient in reducing layer 2 to 0 than a strategically placed bomb in layer 3. And
for the same reason as before - there is always a bomb we can place in ...
Decimal precision and scale in EF Code First
I'm experimenting with this code-first approach, but I'm find out now that a property of type System.Decimal gets mapped to a sql column of type decimal(18, 0).
...
What algorithm gives suggestions in a spell checker?
...n distance is not exactly the right edit distance for a spell checker. It knows only insertion, deletion and substitution. Transposition is missing and produces 2 for a transposition of 1 character (it's 1 delete and 1 insertion). Damerau–Levenshtein distance is the right edit distance.
...
Can't specify the 'async' modifier on the 'Main' method of a console app
...Update, 2017-11-30: As of Visual Studio 2017 Update 3 (15.3), the language now supports an async Main - as long as it returns Task or Task<T>. So you can now do this:
class Program
{
static async Task Main(string[] args)
{
Bootstrapper bs = new Bootstrapper();
var list ...
What are the primary differences between TDD and BDD? [closed]
...
Above 'Tom Ten Thij' link is dead by now.. here's live @ - tomtenthij.nl/2008/1/25/…
– Kundan Pandit
Jan 19 '15 at 6:41
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