Q&A Discussions

How is this possible that null and undefined is not equal?

3 Votes

6 Answers

25th Jul 2022, 12:24 PM

Hansika . (Honey)

javascript node.js

0 Votes

Where can I further my education on web development and also get a certificate

28th Apr 2023, 6:00 AM

Farhad Rahmani

Hey friends when i run my code it shows time limit exeeded........ Why?

1 Vote

7 Answers

19th Aug 2022, 8:50 AM

Adedamola Busari

How can I keep going when it gets frustrating?

7 Votes

5 Answers

7th Jun 2017, 7:32 AM

Himanshu Saroj

Why is my input undefined when I run the program?

1 Vote

13 Answers

6th Jul 2017, 9:33 AM

Mahmud Hasan Saikat

html javascript

-1 Vote

I am not getting the answer, its showing value is undefined

9th Jun 2018, 3:12 AM

Eilia Zandi

class constructor javascript new program this

0 Votes

Hi, Why should l get an error Undefined Timerinr in my code?

2nd Jul 2020, 10:09 AM

C Alpha Beraka

5 Votes

Why function "return UNDEFINED" ?

13th Jul 2020, 7:38 AM

Egor Tonchev(EGO)

functions javascript undefined

0 Votes

Why am I getting undefined if I remove 'this' ?

12th Mar 2019, 4:28 PM

misha

0 Votes

Always get an undefined right after loading an image changer JS on my website

8th Jan 2023, 6:21 PM

Levi

js math.floor website

0 Votes

11 Answers

11th Aug 2023, 12:30 PM

Jessica Zarate

Why do I get undefined index in this code?

file in netbeans php upload

0 Votes

Why this keyword return undefined and doesn't work for changing object value

30th May 2018, 1:30 PM

Adu Fp

javascript this

3 Votes

How Can We Solve "Pylint Undefined Variable" Error In Python ?

1st Aug 2022, 12:01 PM

EsaKurniawan

pylint

0 Votes

What is the difference between null and undefined in JavaScript ?

4th Apr 2021, 10:14 AM

Sagar Sadashiv Bhoir

javascript null undefined

2 Votes

How to combine the all save codes

17th Jul 2017, 3:22 AM

kashish

I am making Guess the number game but have many mistake in codes so.help me to find out the mistakes

1 Vote

5 Answers

20th Feb 2020, 1:15 PM

Mark Jerome De Leon

1 Vote

Why the document.getElementById("input").value for an input return undefined as a value?

13th May 2023, 10:46 AM

Panchal Ram

html javascript web

0 Votes

alguem pode me ajudar. ../Playground/:85:in `<main>' : undefined : method `chomp' for nil:NilClass (NoMethodError)

8th Dec 2017, 8:19 PM

Mustafa Ahmed

english iniciante new novice portuguese pt-br ruby spanish

3 Votes

8 Answers

5th Apr 2018, 3:12 PM

David Carvalho

Why my code is giving uncaught syntax error- undefined label 'recurs'

1 Vote

Shuold i learn html as my first language

9th Aug 2018, 5:46 PM

Sanjeev Kumar

0 Votes

Unlimited gems and coins for games and online apps

4th May 2021, 3:31 AM

Sagar Raghu

0 Votes

5th Mar 2025, 11:09 PM

Emerald Anne

Please solve error

1 Vote

Var n =5; if(n%2==0){console.log(n);

9th Jan 2023, 2:13 PM

ViShal Bhoi

Why is there an undefined letter in these loop problems?

1 Vote

5 Answers

7th Jan 2018, 1:30 PM

Usama Ali Abo Ali

loops python

-2 Votes

How do I unlock my classes so as to continue learning?

18th Mar 2017, 2:42 PM

Ivan

0 Votes

Why does the getElementsByTagName return undefined when processed by a for loop?

24th Jun 2020, 9:02 AM

Eudora C Ejimole

arrays javascript undefined

0 Votes

Why are my constructor properties returning undefined in my prototype function?

17th Feb 2021, 10:08 PM

Moshe Schnitzler

functions javascript objects prototype

0 Votes

Why does this code prints not only the argument passed to the function but also an undefined type.

6th Jan 2019, 7:49 PM

Thomas Czernek

console javascript

1 Vote

14 Answers

25th Aug 2022, 9:29 AM

Dhanraj Tamang

Why it is showing syntax identification error while i am using division ?

0 Votes

26th May 2021, 4:12 PM

Mrityunjoy Kumar

Why it is undefined?

string undefined

9 Votes

Can someone pls explain to me why this code below outputs undefined

28th Apr 2019, 11:43 AM

Sławek J.

1 Vote

How to create a back button to get to the last photo in Xml

29th May 2020, 1:17 PM

Victor Emmanuel

0 Votes

const item={ "hye":true , "hi":false , "hii":var undefined "hiii":undefined } console.log(item ["hye"])

13th Mar 2020, 3:24 PM

Ashish Srivastava

predefined-variables

0 Votes

why is the output of this code " 'rockfunc' is undefined " please explain ;-) [SOLVED]

13th Sep 2022, 12:14 PM

Badnam 4758

7 Votes

8 Answers

6th May 2017, 6:10 PM

_Retr0/-

How to underline stuff

1 Vote

What are the main programming languages I should focus on as a full stack developer

9th Sep 2017, 12:35 PM

Cameron

0 Votes

Can anyone tell me how to edit uneditable extension files by programming?? Like i have a. Jdi extension file. How to edit it?

5th Aug 2022, 11:13 PM

Ashogbon Victor

0 Votes

Getting undefined outside of function, even though return is working fine

8th Mar 2019, 5:21 AM

Anurag

0 Votes

I've been using variable variables concept but it's showing error like undefined variable.

25th May 2020, 2:59 PM

horcrux88

php variables

0 Votes

TypeError: undefined is not an object (evaluating 'array[sq] = p+r') at Line: 59

4th Oct 2016, 1:28 PM

Samik Anwar

array bug js

0 Votes

Why am i getting an error method repeat(int) is undefined for the type string

27th Oct 2019, 6:54 PM

Bright Lin

java

0 Votes

12th Aug 2020, 11:52 AM

John

como crear un macro

0 Votes

Why my Rover doesn't work ?!!

23rd May 2020, 7:10 AM

the king

Is Java easy to learn?

java learn undefined

12 Votes

17 Answers

8th Jun 2019, 4:59 PM

Belén G.

javascript undefined

7 Votes

7 Answers

16th Dec 2018, 1:30 PM

Bono

null == undefined , null === undefined, which one will return true in JavaScript ?

html html5 javascript json node.js

1 Vote

How to ask the user to enter words infinitely unless QUIT value(-1)

30th May 2018, 1:28 AM

Jalal Uddin

0 Votes

`ForEach` only returns undefined and `map` and `reduce` do not work on this problem. How to make code work?!

13th Nov 2022, 11:47 AM

Jigojigs

arrow-function foreach

0 Votes

13 Answers

3rd Feb 2021, 9:00 AM

Emmanuel Riano

Why do I get undefined variable error while the variable is already defined?

error errormessage errorsinphp php phperror

0 Votes

Why is this code giving the output "5, undefined , 5" instead of "5,undefined , 10"?

9th Jun 2018, 7:38 AM

john chagaz

1 Vote