wipe | HTML 5 canvas , daub , automatic playback daub trajectory | Audio Utils library

Why does calling fake.Provide() wipe out fakes already configured with A.CallTo()? Is this a bug?

I'm trying to understand a problem I've run into with Autofac.Extras.FakeItEasy (aka AutoFake). I have a partial solution, but I don't understand why my original code doesn't work. The original code is complicated, so I've spent some time simplifying it for the purposes of this question.

Why does this test fail? (working DotNetFiddle)

I am trying to animate a simple patches.Rectangle object using matplotlib. I want to plot the path traced by the said object (or the area swiped by it) in the animation. I could see that people are tracing paths of a single particle by appending all its previous positions to a list, but I am not sure how to do that for, say, a Rectangle .

One way to do that (I guess) would be to plot the Rectangle in the new positions without wiping out the Rectangle from the previous frames. But I don't know how to do that.

I am using the following code:

I'm working in an Angular 11 Project.

I know there's the ngIf directive, which will only show the html element if set to true, but doesn't preserve spacing.

In the old AngularJS, there was ng-show and ng-hide. These properties would show/hide an element, but keep its spacing (effectively setting the css to visibility to hidden). But Angular no longer has those properties. Instead they recommend binding to the hidden property (https://angular.io/guide/ajs-quick-reference#ng-show).
However, this doesn't preserve the spacing (which is strange IMO).
Does Angular have a directive that hides the element while also preserving its spacing?

I can add a conditional class, where the class has a visibility of hidden, but I trying to confirm if Angular has a directive/property for this.

I wiped up a demo here: https://stackblitz.com/edit/hide-element-angular?file=src/app/autocomplete-auto-active-first-option-example.html
This shows the hidden and ngIf do not perserve spacing, while the conditional class will.

I am looking to make a list of columns all null. These columns might or might not have values within them. Ideally I am trying to wipe the columns clean of data.

This is what I currently have tried:

Here is the project.

It should show an interactive grid on screen, with some buttons and an explanation on how to best interact with the system, but I suppose I have done something wrong. It works on my local environment.

JS:

Note: Minimal working example here. Click on change text button, and you can see the text will appear for one frame and disappear.

I wanted to add an overlay to my video, so I stacked two canvases and filled text to the transparent top canvas.

However, the text does not stick. It disappears.

To test if I was filling the text correctly, I tried using a black canvas (no video) underneath.

I just needed to fillText once and the text stayed.

However, with the video canvas underneath, the text won't stick unless I draw text in requestAnimationFrame, which I believe keeps drawing the same text in every frame, which is unnecessary.

The text canvas is supposed to be separate from the video canvas. Why is this getting wiped out without requestAnimationFrame?

How can I fix it?

Minimal working example here, but the code is also shown below.

I used to have mongodb (the unofficial package) installed on Ubuntu 20.04. I decided to change to the official one.(version 4.4) First, both packages got confilcted, but after wiping the old one, the install succeeded.

But, when I try to run the mongod service,it fails, and shows this:

See code below and log. I am working on a google sheets script that updates a google sheet when a linked google form is submitted. To do this I am using the array "event.namedValues", which is generated automatically when a form is submitted. However while debugging some issues (and learning how to do this), I wanted to check the length of the array I was working with and it would return "null". When I tried adding the .length property of the array to 0, the logger logged "NAN" (See log below). What am I doing wrong?

Code Sample:

I am scraping a yellow page to get the name of all physiotherapists in a city. With the url I get the list of 50 physiotherapists, however, when I expand the page, the url does not change. How do I get the full list of names?

This is how I get the list of physiotherapist in city of Rostock.