conduit | Securely call firmware functions from the cloud

I’m building a WPF C# application that has multiple DataGrids bound to their respective ObservableCollections that contain objects.

I will focus on the DataGrid that binds to the Conduits ObservableCollection to keep things simple.

The DataGrids are set to multi select SelectionMode="Extended". The data in the DataGrids is also represented in a 2D view via a Canvas and drawing elements.

The idea is the user can select the objects in 2D or the DataGrids, as a single item, or multiple items/rows, and the DataGrid row, or object in 2D will be highlighted.

This is producing some unstable results. Too many to list, so I will focus on deleting items. I can delete objects in the 2D without problem when the DataGrid ViewModels have not been initialized. Once they are initialized I get the following error when deleting in 2D.

My Application displays a lot of lines and polygons/paths on a canvas. My ViewModel holds a series of ObservableCollections that represent different items to be drawn.

The issue I have is the application is very slow to zoom and pan. Zoom and pan is all taken care of using an IvalueConverter and converts from world coordinate system to the canvas coordinate system.

For this to work, I have to NotifyPropertyChange all objects visible on the screen to force them to be redrawn with the latest pan and zoom values. It works very well for a few hundred lines, but for thousands it’s very slow. And if you zoom out so all objects are visible therefore subject to NotifyPropertyChange it’s almost unusable with over 10,000 lines.

I’m not using the polygons built-in features in any way as all handling, selection moving etc is taken care of in the viewmodel. I therefore want to try and use DrawingVisual instead of Shapes as I understand they have much lower overheads but I can’t find any good MVVM examples of how to use them. Examples I have seen show them being built in codebehind which isn’t how I think I should be using them.

Examples as follows:

I am trying to create a commit using gitlib, but it does not quite work as expected. What I'm stuck at is the application of function writeBlob. Here is my source code:

I am using Sequelize and express.js in server development.

When I try to send GET request for route /files, an error shows:

I am getting following error logs related to io.undertow.request package.

My ItemsCOntrol below has two DataTemplates, one source, that contains one DataType named Conduits. If I remove either one of the DataTemplates then it works. With both I get the following error.

In an effort to become better with Haskell, I'm rewriting a small CLI that I developed originally in Python. The CLI mostly makes GET requests to an API and allows for filtering/formatting the JSON result.

I'm finding my Haskell version to be a lot slower than my Python one.

To help narrow down the problem, I excluded all parts of my Haskell code except the fetching of data - essentially, it's this:

I want to show only two properties of the model in the list of items, but then in a specific item show all the properties

/api/character <-- show a list with name and id properties /api/character/30 <-- show all properties of the item with id 30

Code i have in serializer.py:

I'm trying to build content-addressable file storage. The process is straightforward: take a stream of bytes and write it to a temp location while at the same time calculating a hash of the stream contents, then once the stream is done move the fully written temp object to its final location based on that hash.

Basically like this Conduit example, but with something a little more robust than the filesystem backing it: