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QUESTION
So I've read the documentation on how to extend the server here:
and followed this tutorial:
https://dev.to/silentrobi/keycloak-custom-rest-api-search-by-user-attribute-keycloak-3a8c
I'm trying to get users by a custom attribute and so far it is working when I try it with Postman. However, when I tried to send the get request from my angular app it returned the CORS error: No 'Access-Control-Allow-Origin' header is present on the requested resource. I've tried adding the @CrossOrigin annotation with localhost as the origin but it didn't work. I also tried setting the headers manually on the response with * or localhost as the origin like this:
...ANSWER
Answered 2021-Jun-04 at 07:09You need to respond to preflight OPTIONS request as mentioned by @solveMe.
QUESTION
I am working on a project where I had received all the designs in Adobe Xd format. I usually work on the backend part and database and server deployment. But here I need to work on the design part too.
I used adobe Xd webexport plugin and converted the design into html format. But real problems arise on the responsive part for mobile and tablet.
What is the quick solution for me to responsive those html pages?
here is the code of the sample html that I received after converting using webexport in adobe Xd. Really appreciate some thoughts on this matter.
HTML
...ANSWER
Answered 2021-Jun-01 at 08:37I will advice you learn some frontend technics like html, CSS and bootstrap because it will really help you.
you can work with this little work of mine and maybe later I'll update it
QUESTION
I am writing some documentation about TypeScript and I'm talking about the possible usefulness of the never
keyword, one being exhaustive checking, as described here:
I have some code like this:
...ANSWER
Answered 2021-May-25 at 08:20The solution is to rather than relying on the return type of the fail function to cause compile time errors, you use the parameters of the fail function.
QUESTION
I have around 200-300 yaml files lying around and What I am trying to achieve is to change only the image: option in few of my yaml files, I have a shell script which can get the required yaml files, and I just want to achieve changing the image: key only.
Solution Tried:
Used a tool yq v4:
...ANSWER
Answered 2021-May-07 at 16:37Does it have to be yq ?
I would do it with a fairly simple bash
one-liner, using sed
:
QUESTION
I am coming from the world of Node.js where I learn a lot from building web application using Express and there, there is a good way, I think, to handle when dealing with error and in case of unexpected error, there is a awesome way to catch it.
So, I looked for the same thing in Go. I don't know if I have already found it, but what I found come from this link https://astaxie.gitbooks.io/build-web-application-with-golang/content/en/11.1.html and from some articles I read, it seems like many developers are using the same approach.
My concern, and not a real one, is that I don't understand some part of that code below.
...ANSWER
Answered 2021-May-07 at 05:10In Go, we can define custom types from any primitive types, example:
QUESTION
I have a Rails 6.1 app using devise 4.7.1, doorkeeper 5.5.1, and devise-doorkeeper 1.2.0.
I'm trying to run through a (PKCE) OAuth flow, but the final step -- a POST request to /oauth/token
-- returns a 401 Unauthorized error with the JSON content {"error": "You need to sign in or sign up before continuing."}
.
I'm confused about this, since the /oauth/token
endpoint should be accessible to unauthenticated users as far as I understand. What's also weird (but perhaps a red herring) is that if I attempt to run the same POST request with curl, but remove the User-Agent header, it succeeds.
My current suspect is this block of code in initializers/doorkeeper.rb
:
ANSWER
Answered 2021-May-05 at 19:47This problem was caused by our use of the Ahoy analytics library.
By default, this library tracks all page visits in your Rails app. It tries to get the current user using current_user || current_resource_owner
. Because current_user
was still nil when POSTing to /oauth/token
, getting current_resource_owner
ended up calling our Doorkeeper resource_owner_authenticator
, which returned the 401 error. The source code for this is here.
This also explains why things worked as expected when unsetting the User-Agent
header: with no user agent (or the user agent of e.g. curl), Ahoy treats the request as coming from a bot, and doesn't attempt to track it (source code here).
Our solution to this is to tell Ahoy to stop tracking all page views automatically by setting Ahoy.api_only = true
in its configuration.
QUESTION
Leetcode 256: Paint House
I am trying to solve the this problem with the Simulated Annealing algorithm. But the result is far away from the correct answer, which is calculated with the DP method.
e.g., I made a 10x3 costs matrix as following, the correct minimum cost is 50, but the result of Simulated Annealing is 70~90 in most cases.
Briefly speaking, I constructed an initial status(a combination of houses' colors), the color of the 1st house was Red, and Blue for the 2nd one, Green for the 3rd one, Red for the 4th one, and so on. And let's assume the cost of the this combination of colors is the minimum cost.
Under the process of annealing, I choose a house randomly firstly, changed its color, and adjusted the colors of two neighbors of this house to meet the precondition of "no two adjacent houses have the same color." Then I recalculated the cost of the new combination of colors. If the new cost is less than the minimum one, the new cost will become the minimum. Otherwise, I accepted the more expensive combination if and only if rand() <= acceptanceProbability
. And I repeated these steps again and again until the temperature T is near 0.
Is the SA algorithm suitable for this problem? And if the answer is YES and there are no bugs in my code, what should I tunning, the initial combination of colors, the speed of cool down, or anything else, to make the cost calculating with SA to approach the correct one.
...ANSWER
Answered 2021-Apr-20 at 10:33Yes, this can be done with Simulated Annealing,
I will give you a straigh forward python example, few things to notice:
- I won't suggest any invalid coloring, so only propose colorings that are valid. This way SA won't spend energy/time on fixing invalid states which are so easy to verify.
- A very easy proposal: Take 1 random house, and see if we can change the color without creating a color violation
Python code:
QUESTION
I'm reading a functional programming tutorial called Professor Frisby's Mostly Adequate Guide to Functional Programming, the author gives an introduction to Hindley-Milner
and several examples about it, one of them being:
ANSWER
Answered 2021-Apr-14 at 08:27I went through this tutorial myself and I think generally functions are assumed to be curried so f
being b -> a -> b
is perhaps counter-intuitive but not necessarily wrong AFAIK. (Take everything I say with a pinch of salt; I'm not an expert ;)
However the parentheses around f
itself in the reduce
signature gives an important clue to the reader (at least to the JavaScript reader) that f
is a function:
QUESTION
Using the yq tool, is there any way to make it assign/update a value to be empty (not empty string or null
, just empty)?
For example, the current behavior is this:
...ANSWER
Answered 2021-Apr-13 at 09:55If you set the tag to !!null
, yq will output the scalar without quotes:
QUESTION
I render the exact same R bookdown
source, but get slightly different results depending on the operating system. This only regards the wrapping of the output width of code chunks when rendering with pandoc to HTML.
If the output is rather large like this
on Windows 10 it adds a horizontal scroll bar, when looking at it on smaller screens.
Running the same code on Ubuntu 20.04 gives me a different result
I checked the output message of bookdown::render_book("index.Rmd", "bookdown::gitbook")
and it's the exact same for both operating systems. The pandoc version is the same, too (2.11.4).
Any idea is highly appreaciated.
...ANSWER
Answered 2021-Apr-12 at 14:57To inspect options("width")
was the right hint from @thothal
. I explicitly set the tibble.width
but not the width
globally.
The lines will break without a horizontal scroll bar, if tibble.width > width
. After updating my packages and RStudio I saw the same behavior on both operating systems. Not quiet sure though, what caused the difference in the first place. Maybe something changed for the tibble.width
option internally. Or the default width
depends on the OS or screen width of the device where it's run (unlikely).
To summarise: The tibble.width
has to be equal or smaller than the global width
to avoid that ugly line break. It's best to set both explicitly.
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