stackoverflow icon

Stackoverflow

I got this error in React - "Uncaught TypeError: Cannot read properties of undefined (reading 'match')" can someone help me please? [closed]Bitwise division in C : Programme seems to work for other numbers but when the divisor is 0 it returns 11 for no apparent reasonCodeigniter 3... Undefined Property $NgetestError: Undefined Mixin in Nuxt 3 when using Sass — "Pre-transform error: [sass] Error: Undefined mixin." I'm working with a Nuxt 3 projectJavascript TypeError undefined on for loop only (not off-by-one) [duplicate]NestJS: After adding a new module and injecting services from other modules, application stopped workingWhen submitting data through an EJS form, all data get returned as "undefined"Why are my songs showing up as undefined?Undefined reference to inherited Methods [duplicate]Type similar to Record<A, B> but saying that not for every A there is a B value (not even an undefined)What does the empty function body return in JS?Why can for...in loop run on undefined?TypeScript ignores explicit undefined type annotationholder.js has 'global is undefined' errorTesting undefined, failing in JS"Cucumber @ParameterType Named Parameter Not Recognized in IntelliJ"Uncaught TypeError: Cannot read properties of undefined (reading 'refs') in React Js using NX monorepoTypescript: undefined property cast check?Cannot Read Properties of undefined in a 2-Dimensional Matrix, HTML & JavascriptHow to solve undefined property $xx in the public function __construct at a controller on Codeigniter 4.5.5Function in flask app can't find variable, but online flask debugger can [duplicate]Why do I get a linker message: undefined reference to `Date::Date(int, int, int)' [duplicate]Jquery: Each inside each not recognizing pre-defined arrayThe method 'createTicker' isn't defined for the typetype data for props undefined in local component vue3.js with import tag Vue3, Vue3 needed for a alone pageenvironmental variables accessing in backend files [duplicate]Function return undefined [duplicate]How to use public functions in other source code files in golang?Digital Root Function returns "undefined" [duplicate]API FOR JS loop giving undefined at end of dataServer Timing API - There's undefined and unexpected png on my running browserWhy Google_Service_Drive type is undefinedFirst Element is Undefined in Drop Event Handler using jQuery UI Draggable and DroppableIn Alpine.JS, this.property inside method is undefinedAngular - TypeError: Cannot read properties of undefined (reading 'forEach')Can TypeScript specify keys that are allowed to not exist, but cannot be assigned to `undefined`? [duplicate]Empty vs. Undefined in Javascript [duplicate]Having an issue with Tyranobuilder, unexpected character issueProblem when using loop-generated variables in ansibleundefined object while using useContextvuejs3 and vite import.meta.env.VITE_BASE_URL not workingFacing error while making iOS build in xcode 15.2Uncaught Error: Cannot read property 'navigate' of undefinedReact component receiving undefined propsTypeError: Cannot read property 'explorerPage' of undefinedJS class variable is always undefined even though it's assigned and is never assigned to undefined, inconsistently showed by DevTools as wellvue js Cannot find module './undefined'How to pass variable to function if exists?Unable to read "wr_en, fifo_in" data using module instantiationEnforce generic function parameter to accept only types that include undefined and/or null [duplicate]

I'm creating a video game search app. I'm using an API so that clicking a searched game card takes you to a new page that contains images and a brief intro about the game. However, this does not work, ... I am trying to solve the problem posed in this question which asks that division of two numbers be performed in a bitwise manner. So, I wrote the following functions. sum() adds two numbers. larger() ... Models: Ngetest.phpp <?php defined('BASEPATH') or exit('No direct script access allowed'); class Ngetest extends CI_Model { public function showEcho() { return "naisu"; ... I'm working with a Nuxt 3 project, and I'm getting the following error related to Sass mixins when I try to run the dev server: ➜ DevTools: press Shift + Alt + D in the browser (v2.5.0) ... I have a function that gets called when you click a button. I'm checking to see if the clicked item has the class "itm-active". If it does, don't do anything. Else check for elements that ... I'm building a backend application using NestJS, and everything was working smoothly. Recently, I added a new module and attempted to use services from existing modules within it. However, after ... I'm currently trying to make a login and signup form using EJS, Express, Node, etc. However Whenever I submit data from a form, all data is being returned as "Invalid" I've checked my user ... Working in p5.js on a class assignment. We have to make a music player. I found a tutorial in the site, but despite copying the code near-exactly (only altering so as to implement multiple songs), I ... I'm trying to implement two Classes - 'EditObject' and 'ProgressObject'. Progressobject is supposed to inherit from EditObject, all its variables and Methods. When I try to use Methods from '... Record is defined as follows: /** * Construct a type with a set of properties K of type T */ type Record<K extends keyof any, T> = { [P in K]: T; }; It is defined such that for a Record&... Does an empty function body implicitly return undefined in JS? console.log((() => {})()) Clearly it does right? The console outputs undefined in the example above... // but let's do ... Why does this code work? for (const i in undefined) {} From for...in - JavaScript | MDN: The for...in statement iterates over all enumerable string properties of an object (ignoring properties keyed ... When I specify a type of foo|undefined for myConst below, type inspection correctly tells me that myConst has a type of foo|undefined on that line. However, in the next line down, type inspection says ... When I tried to use holder image within the below code: import { run as runHolder } from "holderjs/holder"; import React, { Fragment, useEffect } from "react"; import { Image } ... In an Express app I have the following JS code (server side) in a middleware to check that a user provides an adequate token. This is only the relevant part for my question: const authHeader = req.... I'm using @ParameterType in Cucumber to define a custom type and assigning a name to it. However, when I reference this name in my @Then step definition, the step in my feature file still shows as ... Getting this error while closing the modal from closeModal component. I have written path replace using history.push() function. Ex. const OnClose = () =>{ history.push({ pathname: "/... We ran into the issue that a property was undefined even though the type doesn't allow it. Turns out the way we create the object in place has some issues. I made a small example which the linter ... I'm working on creating a pixel-based light in the dark simulation with JavaScript to improve my coding skills. The goal is to create a bubble of light around the cursor as it moves. I'm only ... I got undefined property $Surat when defined an object called Surat at a controller on Codeigniter 4.5.5 This is the controller file <?php namespace App\Controllers; use App\Controllers\... I've been working on a python web development course, and my course wants me to make a website that lists some cafés in London. I'm trying to code the functionality to add a café, but when I run the ... Doing the problems in a popular textbook, I got a error when using a member function in a struct: .../s09-04-02.cpp:30: undefined reference to `Date::Date(int, int, int)' // s09-04-02.cpp simple ... I'm trying to create an array that keeps track of which lines are already hit so they aren't checked repeatedly if I allow the game to continue until another bingo is hit. This is where my problem is ... I was trying to create a simple ticker: Ticker? ticker; @override void initState() { super.initState(); ticker = createTicker(tick); ticker!.start(); } @override void dispose() { ticker?.... The use-noms-cpnt component is as follows: <div id="app"> <use-noms-cpnt></use-noms-cpnt> </div> I have an App component and an App mounted like this, I put a props ... The following is the tree structure of the files file tree This is code with error : mailtrap.config.js import { MailtrapClient } from "mailtrap"; import dotenv from "dotenv"; ... I have a function that return a undefined thing even if it normally need to return something defined. I have this code with a function: const GtfsRealtimeBindings = require("gtfs-realtime-... Here is my codes. //main.go package main import ( "fmt" ) func main() { bc := NewBlockchain() bc.AddBlock("Send 1 BTC to Ivan") bc.AddBlock("Send 2 more BTC ... I'm new to programming! Trying to write a function that obtains the digital root of a number. Currently struggling with the "for loop" and "if else" portion of the formula that ... I am working with this Github code. https://github.com/He3556/Mixcloud-Unfollowers the issue I am facing is that it seems that at the end of the API page, the for loop gives me undefined on the ... I got a weird issue when I was working on html, js.Below is what I got, the point is that when I sent the same code to other computer, it works well with the data, and I also got a line of "... Please someone help me with this. Why the Google_Service_Drive is undefined? I Has installed the google/apiclient and do the configuration on .env file but it still says its undefined. I've been tryng ... I'm working on a web application (via python Flask server) using jQuery UI's draggable and droppable features. I have draggable elements that are supposed to be combined when dropped into a droppable ... I have a request for help with Alpine.JS I have a packetaApiKey property defined. When I access it this.packetaApiKey in the pickPoint method, it works as expected. But in the showSelectedPickupPoint ... I am trying to read the roles array from this object and getting the error: TypeError: Cannot read properties of undefined (reading 'forEach') Code: this.data.roles.forEach(role => { this.... Summary I want to disallow any explicit undefined value while still allowing implicit undefined values. Background In JavaScript, we have this behavior where accessing a key that does not exist yields ... In Javascript, if I make an array using Array(10), it creates an array with 10 empty items. If I access any item in that array, it returns undefined. However, if I create an array with a length of 10 ... I am building a game using Tyranobuilder, I defined a character focus behavior on game settings, such that when a character joins the scene and speaks, they will be bright and when another character ... What i'm trying to do is generating lots of similar directory trees. I woul like to set a dict which describes the pattern of the tree. Then i want ansible to generate multiple directory trees with ... This particular things seems happening when i run these codes AuthContext.jsx: // context is a state management tool for passing props import { createContext, useReducer } from "react"; // ... Hello I'm trying to get base url from .env file. And I'm getting undefined. I have tried some stack overflow answers and documentation but it didn't help. console.log('env', import.meta.env.... `Failed to build iOS app in Xcode 15.2. I am facing this errors ("ld: Undefined symbols" and "clang: error: linker command failed with exit code 1 (use -v to see invocation)"). ... I'm trying to implement a very simple navigation in react native. I'm trying to navigate from the Home Screen by clicking a button to go to a Details Screen. When clicking the button I get this error: ... I have a simple React app(created with vite), where i am passing a list of objects to a component Carts, Carts component simply parses the list and returns JSX. But there is a error pointing that the ... I am upgrading jest from version 23 to 29. My project used to work fine before the upgrade, suddenly started observing this issue. I use Typescript as a language. TestPageDefs Module looks like below: ... I am having a strange situation where a variable is assigned (and I made sure the assigned value is not undefined) but the value is always undefined. Strangely enough when inspecting the value by ... I'm using Vuejs, and calling my symfony API with a get route. I have the result, an array of objects, but I still have this error: Cannot find module './undefined' When I try with an array with only ... I have a json sample getting it from a function, and have to pass some of it's parameters to my function but if they exist. def myfunction(var1=None): some code return if myjson['parameter1'] ... Is there anything wrong with my instantiation? 8 to 32 bit converter is working fine. Input to fifo is read only when wr_en is high. wr_en is connected to output signal of valid_q (when valid_q=1, ... How to enforce generic function parameter to accept only types that include undefined and null: function foo<T>(val: T) { ... } let fooNonNullOrUndefined: string = "foo" foo(...

  • javascript
  • reactjs
  • regex
  • undefined
  • c
  • bit-manipulation
  • undefined
  • bitwise-operators
  • division
  • codeigniter
  • model
  • controller
  • undefined
  • codeigniter-3
  • css
  • sass
  • undefined
  • nuxt3.js
  • scss-mixins
  • javascript
  • for-loop
  • typeerror
  • undefined
  • innerhtml
  • nestjs
  • undefined
  • circular-dependency
  • mongodb
  • express
  • undefined
  • ejs
  • javascript
  • undefined
  • p5.js
  • audio-player
  • c++
  • inheritance
  • undefined
  • typescript
  • undefined
  • partial
  • javascript
  • undefined
  • void
  • javascript
  • for-loop
  • undefined
  • enumerable
  • typescript-never
  • typescript
  • undefined
  • typing
  • reactjs
  • parameters
  • undefined
  • holder.js
  • javascript
  • express
  • undefined
  • intellij-idea
  • annotations
  • cucumber
  • undefined
  • javascript
  • reactjs
  • null
  • undefined
  • ref
  • typescript
  • undefined
  • javascript
  • html
  • typeerror
  • undefined
  • undefined
  • codeigniter-4
  • python
  • python-3.x
  • flask
  • undefined
  • flask-wtforms
  • c++
  • struct
  • linker
  • undefined
  • linker-errors
  • jquery
  • multidimensional-array
  • typeerror
  • undefined
  • flutter
  • dart
  • undefined
  • vuejs3
  • radio-button
  • components
  • dataset
  • undefined
  • javascript
  • environment-variables
  • undefined
  • javascript
  • function
  • asynchronous
  • async-await
  • undefined
  • go
  • undefined
  • goland
  • javascript
  • loops
  • recursion
  • undefined
  • jquery
  • for-loop
  • undefined
  • javascript
  • timer
  • undefined
  • content-security-policy
  • phishing
  • php
  • google-api
  • google-drive-api
  • undefined
  • intelephense
  • javascript
  • html
  • variables
  • undefined
  • javascript
  • properties
  • undefined
  • this
  • alpine.js
  • angular
  • typescript
  • runtime-error
  • undefined
  • typescript
  • undefined
  • javascript
  • undefined
  • is-empty
  • character
  • undefined
  • game-engine
  • behavior
  • loops
  • variables
  • ansible
  • nested
  • undefined
  • reactjs
  • undefined
  • mern
  • react-context
  • vue.js
  • vuejs3
  • undefined
  • vite
  • .env
  • ios
  • xcode
  • build
  • undefined
  • debug-symbols
  • react-native
  • react-navigation
  • undefined
  • stack-navigator
  • reactjs
  • undefined
  • vite
  • react-props
  • javascript
  • typescript
  • jestjs
  • undefined
  • ts-jest
  • javascript
  • google-chrome-devtools
  • undefined
  • microsoft-edge
  • vue.js
  • module
  • undefined
  • python
  • undefined
  • variable-assignment
  • undefined
  • port
  • verilog
  • instantiation
  • fifo
  • typescript
  • null
  • undefined
vote icon

-7 2 0 0 1 0 0 2 0 0 0 2 2 1 0 2 0 -3 0 -2 0 0 0 1 0 -1 -2 0 0 1 0 0 0 0 0 2 1 0 0 0 1 -1 0 1 1 0 0 -1 1 0

comments icon

1 2 0 0 0 0 0 2 0 1 2 1 2 0 0 0 0 1 2 1 0 1 1 1 1 1 2 2 0 0 0 2 1 1 1 1 2 1 1 0 1 1 0 1 0 0 0 2 1 0

avatar icon

user31528169uran42SyraxesRinkalbananas0102Naceur Khederuser30069178user29731287CarllSebastian BarthAsleepaceOokerNate GlennPark JongBumMichelAydın FreeDinesh Kumaruser1269009Evan BairRaina ZahSmallCoder12cbcalvinuser2108555Avarage cat enjoyerVinceVinay Sankar GokavarapuYoan Pettorelli이해성user26789162post poop zoomiesFlora JiangIs 46Marek Vinárčikuser2549382nullromoidkdramaticlookKirill ZelepukinVinay Sankar GokavarapuDusanArslan ZafarAnastasija Stojanovskashivam prajapatiManoj KumarLuke VoSBAhosseinfclARUNA MSebastian Barth

stackoverflow icon

Dev to

The Junior Developer is Extinct (And we are creating a disaster)

NorthernDev

NorthernDev

  • #discuss
  • #career
  • #ai
  • #future
vote icon

No reaction

comments icon

130

Build an Accessible Audio Controller

Richard Pascoe

Richard Pascoe

  • #community
  • #learning
  • #programming
  • #webdev
vote icon

No reaction

comments icon

9

You don't need CSS preprocessor

Marat Sabitov

Marat Sabitov

  • #webdev
  • #css
  • #javascript
  • #frontend
vote icon

No reaction

comments icon

2

freeCodeCamp: Full Stack Developer Curriculum

Richard Pascoe

Richard Pascoe

  • #community
  • #learning
  • #programming
  • #webdev
vote icon

No reaction

comments icon

3

Actually Static: When WordPress Stops Being the Enemy

Pascal CESCATO

Pascal CESCATO

  • #devchallenge
  • #githubchallenge
  • #cli
  • #githubcopilot
vote icon

No reaction

comments icon

4

Video Understanding with Gemini 3.0 Flash for Robotics

Paul Ruiz

Paul Ruiz

  • #ai
  • #robotics
  • #gemini
  • #developers
vote icon

No reaction

comments icon

Add Comment

Fighting with json - a war story

Kim Kulling

Kim Kulling

  • #cpp
  • #legacycode
  • #programming
  • #compiler
vote icon

No reaction

comments icon

Add Comment

Dotfiles Coach: Your Shell History is Full of Automation Gold (You Just Don't Know It Yet)

Ola Prøis

Ola Prøis

  • #devchallenge
  • #githubchallenge
  • #cli
  • #githubcopilot
vote icon

No reaction

comments icon

Add Comment

I Built BreakFinder: Personalized Surf Forecasts + Full Garmin Ecosystem

Philipp

Philipp

  • #showdev
  • #devjournal
  • #iot
  • #sideprojects
vote icon

No reaction

comments icon

Add Comment

ContractCompass: Your AI Contract Analyst That Actually Speaks Human

Varshith V Hegde

Varshith V Hegde

  • #devchallenge
  • #algoliachallenge
  • #ai
  • #agents
vote icon

No reaction

comments icon

2

I Spent $47 testing OpenClaw for a week: Here's What's Actually Happening

Likhit Kumar V P

Likhit Kumar V P

  • #ai
  • #programming
  • #productivity
  • #automation
vote icon

No reaction

comments icon

Add Comment

When AI Slaps You in the Face

mathgladiator

mathgladiator

  • #claudeaiexperiences
  • #adamaprogramming
  • #websocketdebugging
  • #futureofaidevelopment
vote icon

No reaction

comments icon

Add Comment

QHexView 5.1 Release (and a little bit of history)

Antonio Davide

Antonio Davide

  • #showdev
  • #cpp
  • #qt
  • #opensource
vote icon

No reaction

comments icon

Add Comment

I built WhaleLook - a Solana crypto wallet tracker to work with API's more (feedback wanted)

Jason Tsikira

Jason Tsikira

  • #webdev
  • #programming
  • #javascript
  • #beginners
vote icon

No reaction

comments icon

Add Comment

I built a “Steam Workshop” for system architecture + product roadmaps + org blueprints (runs in your browser)"

khanmjk

khanmjk

  • #opensource
  • #architecture
  • #productmanagement
  • #ai
vote icon

No reaction

comments icon

Add Comment

Cloning a 90s DOS Game with AI

emick

emick

  • #ai
  • #gamedev
vote icon

No reaction

comments icon

Add Comment

I built an iOS Simulator toolkit for macOS — here's what it does

Emre Can Altaca

Emre Can Altaca

  • #ios
  • #swift
  • #mobile
  • #development
vote icon

No reaction

comments icon

Add Comment

x402 V2 Security Deep Dive: New Attack Vectors in AI Agent Payments

mkmkkkkk

mkmkkkkk

  • #x402
  • #ai
  • #security
  • #blockchain
vote icon

No reaction

comments icon

Add Comment

gradient triangle

Vouchgithub.com/mitchellh

avatar icon

chwtutha

solid triangle

576

solid triangle

257

gradient triangle

AI makes the easy part easier and the hard part harderblundergoat.com

avatar icon

weaksauce

solid triangle

94

solid triangle

72

gradient triangle

Reverse Engineering the Prom for the SGI O2mattst88.com

avatar icon

mattst88

solid triangle

32

solid triangle

7

gradient triangle

More Mac malware from Google searcheclecticlight.co

avatar icon

kristianp

solid triangle

64

solid triangle

35

gradient triangle

Apple XNU: Clutch Schedulergithub.com/apple-oss-distributions

avatar icon

tosh

solid triangle

74

solid triangle

12

gradient triangle

Shifts in U.S. Social Media Use, 2020–2024: Decline, Fragmentation, Polarization (2025)arxiv.org

avatar icon

vinnyglennon

solid triangle

117

solid triangle

102

gradient triangle

Ask HN: What are you working on? (February 2026)

avatar icon

david927

solid triangle

51

solid triangle

163

gradient triangle

Roundcube Webmail: SVG feImage bypasses image blocking to track email opensnullcathedral.com

avatar icon

nullcathedral

solid triangle

99

solid triangle

24

gradient triangle

The Little Bool of Doom (2025)blog.svgames.pl

avatar icon

pocksuppet

solid triangle

77

solid triangle

28

gradient triangle

Show HN: I created a Mars colony RPG based on Kim Stanley Robinson's Mars booksunderhillgame.com

avatar icon

ariaalam

solid triangle

126

solid triangle

52

gradient triangle

Toma (YC W24) Is Hiring Founding Engineersycombinator.com

avatar icon

solid triangle

solid triangle

2 hours ago

gradient triangle

A GTA modder has got the 1997 original working on modern PCs and Steam Deckgtaforums.com

avatar icon

HelloUsername

solid triangle

116

solid triangle

48

gradient triangle

Running Your Own As: BGP on FreeBSD with FRR, GRE Tunnels, and Policy Routinghofstede.it

avatar icon

todsacerdoti

solid triangle

135

solid triangle

50

gradient triangle

Exploiting signed bootloaders to circumvent UEFI Secure Boothabr.com

avatar icon

todsacerdoti

solid triangle

92

solid triangle

52

gradient triangle

Dave Farber has diednanog.org

avatar icon

vitplister

solid triangle

203

solid triangle

33

gradient triangle

RFC 3092 – Etymology of "Foo" (2001)ietf.org

avatar icon

ipnon

solid triangle

121

solid triangle

30

gradient triangle

I put a real-time 3D shader on the Game Boy Colorotterstack.com

avatar icon

adunk

solid triangle

240

solid triangle

31

gradient triangle

GitHub Agentic Workflowsgithub.github.io

avatar icon

mooreds

solid triangle

201

solid triangle

111

gradient triangle

Ktkit: A Kotlin toolkit for building server applications with Ktorgithub.com/smyrgeorge

avatar icon

smyrgeorge

solid triangle

8

solid triangle

1 comment

gradient triangle

Omega-3 is inversely related to risk of early-onset dementianih.gov

avatar icon

brandonb

solid triangle

231

solid triangle

136

gradient triangle

Quartz Crystalspa3fwm.nl

avatar icon

gtsnexp

solid triangle

6

solid triangle

discuss

gradient triangle

Curating a Show on My Ineffable Mother, Ursula K. Le Guinhyperallergic.com

avatar icon

bryanrasmussen

solid triangle

156

solid triangle

54

gradient triangle

OpenClaw is changing my lifereorx.com

avatar icon

novoreorx

solid triangle

226

solid triangle

373

gradient triangle

Bun v1.3.9bun.com

avatar icon

tosh

solid triangle

138

solid triangle

33

gradient triangle

Everything – Locate files and folders by name instantlyvoidtools.com

avatar icon

idw

solid triangle

97

solid triangle

42

gradient triangle

Show HN: It took 4 years to sell my startup. I wrote a book about itderekyan.com

avatar icon

zhyan7109

solid triangle

188

solid triangle

53

gradient triangle

Let's compile Quake like it's 1997fabiensanglard.net

avatar icon

birdculture

solid triangle

138

solid triangle

52

gradient triangle

The first sodium-ion battery EV is a winter range monsterinsideevs.com

avatar icon

andrewjneumann

solid triangle

128

solid triangle

156

gradient triangle

Why E cores make Apple silicon fasteclecticlight.co

avatar icon

ingve

solid triangle

227

solid triangle

220

gradient triangle

Reverse Engineering Raiders of the Lost Ark for the Atari 2600github.com/joshuanwalker

avatar icon

pacod

solid triangle

83

solid triangle

3