Latest Questions

AttributeError: module 'gym.envs.box2d' has no attribute 'CarRacing' / box 2d doesn't install successfully

environment_name = 'CarRacing-v0' env = gym.make(environment_name) AttributeError: module 'gym.envs.box2d' has no attribute 'CarRacing' and i did pip install b

What is the correct OOP way to add functionality to a set of classes deriving from an abstract base class?

Setting My friend told me that in OOP, you generally don't want to modify any abstract base classes in an existing codebase, because that means you have to impl

Why are we offseting the pixels by 4 when updating colors?

var canvas = document.getElementById("canvas"); var canvas_context = canvas.getContext("2d"); var canvas_buffer = canvas_context.getImageData(0, 0, canvas.width

Props values are not updating in webpack server React js

Whenever I try to pass or update the props value from parent to child I need to restart the webpack server everytime. I don't know why props value are not getti

Checking the normality assumption of a linear mixed effects model

I have the following code for an LME: IDRTlme <- lme(Score ~ Group*Condition, random = ~1|ID, data=IDRT) I want to check the normality assumption, and so I h

Rubocop: Assignment Branch Condition size for method is too high. How can I reduce the method?

This block of code: def set_conversation @conversation = Conversation.find(params[:conversation_id]) .match.origin_target.

fuse.js takes 10+ seconds with semi-long queries

I have a JSON database with 27k+ entries, and I'm using fuse.js to search through them. Each entry has about 500 characters of text in it. When I search for som

Docker build-push-action "Not a valid object name"; outputs all branches and tags for repo

When running our docker build in a GitHub Action Workflow, the docker/build-push-action@v2 keeps outputting this error below. This is prior to running any of th

Java concurrent deadlock

Run the Main.main() method seems like a deadlock has occurred. I found out it can be fixed if replace notify() with notifyAll(). But why? Shouldn't the worst ca

Printing all the paths in a tree from root to each leaf

I am trying to print all the paths from root to leaf in a tree, but having some issues collecting the path items. Consider the following graph: In my case thou

Flutter: Unable to get Firebase social login email after successful login

I am using social login for my Flutter app for both iOS and Android platforms. After successful login I need to access the user's email from Firebase. I tried i

How can I get the Minecraft class loader?

I'm loading an agent to Minecraft JVM and when I get all the loaded classes from the instrumentation, most of them are not there. My code looks like Class.forNa

React Native: Reference to pod still present after running `yarn remove`

I'm trying to get a legacy React Native project running, and removed react-native-sharing-winstagram with yarn remove react-native-sharing-winstagram. I get the

How To Manually Rollback A Migration in MySQL?

Looks like my ORM, Prisma, does not allow for rolling back a migration. How have folks using Prisma rolled back a migration? Is there a way to manually rollback

How to use css to make div with few sections overflow?

https://jsfiddle.net/g0Lf42bq/6/#&togetherjs=khq05DeHEp I have a div that contains text + icons the icons are visible only when hovering on this div I want

How to remove Keys that would cause Collisions before executing Collectors.toMap()

I have a stream of objects similar to this previous question, however, instead of ignoring duplicate values, I would like to remove any values from that stream

MongoDB Connect train routes

I have a collection of train routes that contain some "connecting" data. For example I have a source and destination field that looks like this { "source": {

Custom field with special constrains in DRF serializer

I'm trying to add a custom field with some special constrains in DRF serializer. Following are 2 sample models: class ModelA(models.Model): field1 = models.

Send a jwt token in my SSE event source (subscribe request)

How can I send a jwt token (or a header (Authorization to be specific)) in my SSE subscription request (the event source)? void subscribe (String jwtToken) asyn

TypeError: Cannot destructure property 'image' of 'product' as it is null

I am unsure why I have this error. Could you please take a look and advise? import React from 'react'; import { client, urlFor } from '../../lib/client'; const

Why memory usage increases when reopening a Parquet file with pandas?

I generated a Pandas dataframe of 8.481.288 rows and 451 columns, where most of the columns have integer values. When I generate this dataframe, the total memor

Exception when trying to use saved Spark ML model for distributed computations with SHAP

I am having this error Exception: It appears that you are attempting to reference SparkContext from a broadcast variable, action, or transformation. SparkConte

socketio.send() does not send data to client

I am trying to send data from server to flutter app using socketIO. Although I am able to connect and emit, the server is not able to send data to client side.

Whitespaces handler in Liquid not working

I cannot figure out how to remove whitespaces from the start and end of my strings. My response body is: { "value": [ { "nomeUnidadeOpe

Curl using Nuget on Visual Studio 2022 doesn't work

I've been trying to get Curl to work with VS for weeks. I've read a ton of other tutorials, guides, installation instructions and other materials and just... No

Pandas pick the higher value for each unique id

I have a df of customers CUST_ID | SEGMENT | AREA 1 | B | CAD 1 | A | RAM 2 | B | CAD 2 | C | RAM 3 | B

I get this error: Attempt to read property "Username" on null, when trying to display the username [duplicate]

I am trying to display the Username on the web page, but I keep on getting the error Here is my blade template @extends('layouts.app') @secti

coroutine nested exception problem on unit test

Can somebody explain why the exception problem is happening only in unit test? I was testing exceptional case for flow and I found exception does not throw as

Prevent mypy errors in platform dependent python code

I have something akin to the following piece of python code: import platform if platform.system() == "Windows": import winreg import win32api def do_cr

Chart.js v2 - Partial Y -grid lines with bar chart

I want tiny "ticks" on the x-axis as seen in the image in between the green bars, that go into the chart, but not all the way to the top of the chart. I have b