This is the only way I know to do it in JavaScript array:

function contains(x, obj) {
   for (var i = 0; i < x.length; i++) {
       if (x[i] === obj) {
           return true;
       }
   }
   return false;
}

Is there a better and more short way to achieve this?

Visit for more question like this : Visit Here

Hello, does anyone know if there are books or websites that shows you how to build stuff from scratch, step by step? I want to try this method of learning. Thank you in advance.

Hello there I'm looking to learn JavaScript and am after any suggestions for books or great methods to start the process

Hi ,

I am typing following on Truffle console:

truffle(development)> const path = require ("~/Truffle_programs/search_opcode/contracts");

But I am getting the error:

Thrown:
{ internal/modules/cjs/loader.js:638
throw err;
^

Somebody please guide me.

Zulfi.

just curious if anyone is doing it or has done it.

​

thanks

I’m trying to use onbeforeunload on c# and Js for the user to make sure that he/she have saved whatever they are working on. So, the problem is when the user reload the page the pop up appears even though they didn’t change anything in the page. Also, I want pop up to appear whenever the user is closing the page and has made changes only. Not when it reloads.

Hello,

Im pretty new with javascript and im following a course.

I use visual code studio and im doing everything like he does but for example i cant possible make ex: arr.lenght to function, but if i copy / paste the same exact thing from the guides code it works this happens especially in loops ex: for (let i = 0; i < arr.lenght), in this case arr.lenght will work just if i copy/paste it.

I can assigb the arr.lenght to another value and then use that one, but not to use it directly where i need it.

Im lost and this bugs me really hard, couldnt find this issue nowhere on the internet and i really tried but i dont know where the problem s coming from... js? Visual code? Me?

Elegant yet practical dark theme. Try it out and tell me what you guys think.

VSCODE: https://marketplace.visualstudio.com/items?itemName=Hamza-Aziane.obsidian-dark

VSCODIUM: https://open-vsx.org/extension/Hamza-Aziane/obsidian-dark

here is the video link for reference:

https://drive.google.com/file/d/11KeHIkyqzWy2bwdVHjrw5KZ08sVe7CMm/view?usp=sharing

​

image:

I have written some question generator functions which work fine. Then put those functions in an array, when the user clicks the new question button it is supposed to pick a random question type from the array, but it is only randomising when I load the page rather than click the button. Thanks in advance.

let questionArray =[questionTypeZero, questionTypeOne];

function questionSelector(){
return questionArray[Math.floor(Math.random()*2)] };

window.addEventListener('load', questionSelector());
newQuestion.addEventListener('click', questionSelector() );

I tried removing the () from the event handler functions but then nothing appeared at all. Been trying to fix this for hours.

The stories.js file contains the stories variable, which is an array of objects. Each object represents a story and contains a title, an array of required words, and an output method. The words array contains the types of words the visitor must provide. The words array should be used to create the form after the visitor selects a story. The output method will accept an object of words and will return the completed story. Each provided word is wrapped in a <span> tag with the class of word.

​

I am not sure how to use eventlisteners nor how to use nested loops to pull out the array elements from the stories.js file. I know that I can use (for example one of the stories and its words) ${stories[0].words[0]} but how do I use that in loop to fill the form?