DrX | Rx doctor is in the house , curing all your ailments | iOS library
kandi X-RAY | DrX Summary
kandi X-RAY | DrX Summary
DrX is a collection of convenience extensions of RxSwift which add new operators for concisely handling common patterns and/or scenarios. In addition to an agnostic core, DrX also supports iOS RxCocoa.
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QUESTION
I am trying to derive the gradient and hessian for a given function. When i directly do the gradient it works well but when I apply chain rule it doesn't works and throws me an error as below
...ANSWER
Answered 2020-Nov-09 at 15:21Probably not be ideal but you can take the derivative with respect to the function r(x)
by using the function functionalDerivative()
. Note that r(x)
will have to be declared after evaluating the first part of the chain rule. After that the second part of the chain rule r'(x)
can be evaluated after substituting the symbolic representation/equation for r(x)
using the subs()
. Following this the two parts of the chain rule can be multiplied. After this process the result matches the step solution in your first solution by taking the diff(f(x))
which differentiates with respect to x
which can also be done by diff(f(x),x)
for brevity.
QUESTION
this is a follow up to this other question: How do I handle player collision with corners of a wall
In inspiration of the code given in its answer, I tried to write some new code.
Basically, in the original, the wall sliding works very well on the inside of the walls, but I wanted to make it work on the outside as well, so I made a new basic code engine, based on his technique:
...ANSWER
Answered 2020-May-08 at 06:48I would say just check that you are not in the corner - discard cases when percentOfWall
is either exactly 0
or exactly 1
EDIT: to address the corners mentioned in the comments I have to explain why your implementation got stuck. It calculated penetration with all the walls and decreased position change by this penetration amount. In the corner, the object collided with both edges at once, and being repulsed from both at once stopped moving.
As you rightly noticed, in the corners your square gets inside the obstacle for one frame and then is pushed out on the consequent frame.
Alternative solutions, however, are more complicated and harder to debug, but here is a sketch for a couple of options:
- Limit the collisions to repulse from only one wall at a time and early exit your
forEach
loop. This is a simple solution which will work in this particular example but won't work in the general case, for example in the corner when you need to collide with 2 walls preventing you to go in both directions. - Add a tiny circle in each of the corners and collide with it to avoid going inside. The normal is along the line between the center of the circle and the point of contact. That smooths the normal discontinuity you have in the corners and there is always a single normal along which the object is repulsed, continuously changing from one segment to the other.
Directing the "push" to outside each segment of the obstacle (which is what you are asking) wouldn't prevent stopping as on the corner (which is exactly the point you are concerned with), both walls will collide with your object and "outside" will be in the opposite directions. So it'll get stuck the same way as before and for exact same reason - normals will be not continuous.
I hope that helps
QUESTION
I have a file with a wide range of information and I want to extract some data from here. I only will post here the interesting part. I want to extract IQ and JQ values as well as the J_ij[meV] value which is two lines above. I read this question How to print 5 consecutive lines after a pattern in file using awk where a pattern is used to extract information bellow and I was thinking doing something similar. My initial idea was:
...ANSWER
Answered 2020-Jan-22 at 13:06Could you please try following. Written and tested with shown examples.
QUESTION
Currently I'm drawing vertices to create polygons, I would like to add sliders to allow a user to increase or decrease the amount of sides the polygons have and the amount drawn. Also having the canvas update with refreshing. I've tried adding a slider to control the noOfSides but I've had no luck. Thanks for your time and help.
...ANSWER
Answered 2020-Jan-10 at 11:55First things first, you need to re-draw your shapes whenever slider changes since you are using noLoop()
.
To do that you can easily define an on change event like this:
QUESTION
I'm developing my own version of getopt() in assembly and trying to get my head wrapped around this snippet, specifically line 476
...ANSWER
Answered 2019-Nov-01 at 04:34Consider this:
QUESTION
I have a problem with transferring the dist parameter from the input file to the result file to the same place where it was located in the input file My code is:
...ANSWER
Answered 2019-Sep-12 at 15:53You simply have to add the dist
variable to the print command. Also, there are a few improvements that could bring to your code:
QUESTION
I wrote a code which is making a request to API and recieving output in JSON. So my question is how to write output for each request in file. Now my code is doing the last one request.
...ANSWER
Answered 2019-Sep-12 at 09:47You need to make this filename "result.txt" dynamic. Currently it is overwriting content.
Perhaps like this:
QUESTION
I am getting a very strange error while I am trying to compile to native. Here is the error:
...ANSWER
Answered 2019-May-17 at 14:13So first, using @BuildStep
only works during Quarkus augmentation phase: you need to be in an extension for it to work. It won't work in application code.
Second you need to delay the runtime initialization of the class holding the field so in your case, probably CollectionNumber
?
So I would try to add:
QUESTION
I have a folder in centos 7 as below:
...ANSWER
Answered 2018-Dec-27 at 16:03Why complicate things using multiple levels of indirection using |
and tee
when you can just run a loop over the result of find
as below
QUESTION
Grep pattern and select portion of a line after a matching patterns 41572: 90000: and 90002:
...ANSWER
Answered 2018-Oct-12 at 06:29Considering that your actual Input_file is same as shown sample, if yes then following may help you.
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