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cartesian product in pandas
...
Use pd.MultiIndex.from_product as an index in an otherwise empty dataframe, then reset its index, and you're done.
a = [1, 2, 3]
b = ["a", "b", "c"]
index = pd.MultiIndex.from_product([a, b], names = ["a", "b"])
pd.DataFrame(index = ...
GIT: Checkout to a specific folder
...
As per Do a "git export" (like "svn export")?
You can use git checkout-index for that, this is a low level command, if you want to export everything, you can use -a,
git checkout-index -a -f --prefix=/destination/path/
To quote the man pages:
The final "/" [on the prefix] is important. Th...
How can I get the corresponding table header (th) from a table cell (td)?
... $th = $td.closest('tbody').prev('thead').find('> tr > th:eq(' + $td.index() + ')');
Or a little bit simplified
var $th = $td.closest('table').find('th').eq($td.index());
share
|
improve t...
Flatten an Array of Arrays in Swift
...ay.flatten(0, self)
}
public static func flatten<Element>(_ index: Int, _ toFlat: [Element]) -> [Element] {
guard index < toFlat.count else { return [] }
var flatten: [Element] = []
if let itemArr = toFlat[index] as? [Element] {
flatten = fl...
SQL Server SELECT LAST N Rows
...hout a sort of some nature this simply won't work, the best solution is to index the major columns being hit and run with something like the above query.
– JonVD
Nov 16 '10 at 23:15
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Comparing two dataframes and getting the differences
...dentical rows and columns. In fact, all dataframes axes are compared with _indexed_same method, and exception is raised if differences found, even in columns/indices order.
If I got you right, you want not to find changes, but symmetric difference. For that, one approach might be concatenate datafr...
Express: How to pass app-instance to routes from a different file?
...redis and db in my case. Won't it effect application performance ? eg: in index.js app.set('redis',redis_client); in routes/example.js router = require('express').Router(); route.get('/test',(req,res,next)=>{ conosle.log(req.app.get('redis')); return res.send("//done"); })
...
Mongo interface [closed]
...ockmongo.com/
If you don't want to install anything ... you can use MongoHQ's web interface (even if you your MongoDB isn't on MongoHQ.)
https://mongohq.com/home
Mac OS X
While MongoHub had been a decent option for a while it's bugs make it virtually unusable at this point ...
There is a more ...
Remove duplicates from an array of objects in JavaScript
...How about with some es6 magic?
things.thing = things.thing.filter((thing, index, self) =>
index === self.findIndex((t) => (
t.place === thing.place && t.name === thing.name
))
)
Reference URL
A more generic solution would be:
const uniqueArray = things.thing.filter((thing,...
Open the start page in Visual Studio after closing a project?
... VS2010, VS2012, VS2013, VS2015)
In current versions, you can also use the Quick Launch (Ctrl+Q) to search for the command
(Just type "Start Page" in Quick Launch)
Visual Studio 2017
There's a menu item File -> Start Page
You can configure the behavior of the IDE on startup via Tools -> Option...