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Cartesian product of x and y array points into single array of 2D points

... A canonical cartesian_product (almost) There are many approaches to this problem with different properties. Some are faster than others, and some are more general-purpose. After a lot of testing and tweaking, I've found that the following functi...
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What should a Multipart HTTP request with multiple files look like? [duplicate]

...0.8 Accept-Language: en-US,en;q=0.5 Accept-Encoding: gzip, deflate Cookie: __atuvc=34%7C7; permanent=0; _gitlab_session=226ad8a0be43681acf38c2fab9497240; __profilin=p%3Dt; request_method=GET Connection: keep-alive Content-Type: multipart/form-data; boundary=---------------------------905191404154484...
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How should a model be structured in MVC? [closed]

...a mock database dependency in your model): class Database { protected $_conn; public function __construct($connection) { $this->_conn = $connection; } public function ExecuteObject($sql, $data) { // stuff } } abstract class Model { protected $_db; public fu...
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How to hide UINavigationBar 1px bottom line

..., a custom background image must also be set with the setBackgroundImage(_:for:) method. If the default background image is used, then the default shadow image will be used regardless of the value of this property. So: let navigationBar = navigationController!.navigationBar navigationBar.se...
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Create a dictionary on a list with grouping

...vert it to a dictionary, as follows: Dim qry = (From acs In ActualSales _ Group By acs.ProductID Into Group _ Select ProductID, Months = Group.ToDictionary(Function(c) c.Period) _ ).ToDictionary(Function(c) c.ProductID) The resulting query can be used as fo...
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rails - Devise - Handling - devise_error_messages

...on Github https://github.com/plataformatec/devise/issues/issue/504/#comment_574788 Jose is saying that devise_error_messsages! method is just a stub (though it contains implementation) and that we're supposed to override/replace it. It would have been nice if this was pointed out somewhere in the w...
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How to do parallel programming in Python?

... pool: from multiprocessing import Pool pool = Pool() result1 = pool.apply_async(solve1, [A]) # evaluate "solve1(A)" asynchronously result2 = pool.apply_async(solve2, [B]) # evaluate "solve2(B)" asynchronously answer1 = result1.get(timeout=10) answer2 = result2.get(timeout=10) This will spa...
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How to create a density plot in matplotlib?

... Sven has shown how to use the class gaussian_kde from Scipy, but you will notice that it doesn't look quite like what you generated with R. This is because gaussian_kde tries to infer the bandwidth automatically. You can play with the bandwidth in a way by changing the...
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Uninstall Node.JS using Linux command line?

... doing this should remove the npm files rm -rf /usr/local/{lib/node{,/.npm,_modules},bin,share/man}/npm* – Jubair Mar 16 '18 at 13:37  |  show...
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Python requests - print entire http request (raw)?

...'X-Custom':'Test'},data='a=1&b=2') prepared = req.prepare() def pretty_print_POST(req): """ At this point it is completely built and ready to be fired; it is "prepared". However pay attention at the formatting used in this function because it is programmed to be pretty ...