How to export variable inside a function to another module

Question

I would like to generate an array and store the value inside a variable and export that variable in a way that i can acess it anywhere i want in my application.

const generateNewArray = () => {

  var numberOfArrayItems = 40;
  var currentArray = Array.from({ length: numberOfArrayItems }, () => Math.floor(Math.random() * 200) + 1);

  return currentArray;
}


export { generateNewArray }

But, until right now i could only export the function. And when i invoke "generateNewArray" i get the function body as answer, and when i invoke "generateNewArray()" i get another random array, different from the original.

How can i acess the "currentArray" variable from anywhere in my application?

Thanks!

the value returned from this function will be different everytime you call it because you geta random number so it's normal no ? — VersifiXion
– VersifiXion, Commented Jun 27, 2021 at 22:58
Yep! Thats correct, i want to generate a random array in every function invoke but i would like to store the value in a variable that i can acess anywhere i want. And if i invoke that function, the value of the variable will change. — Cassiano Guimarães
– Cassiano Guimarães, Commented Jun 28, 2021 at 7:55

Christian Fritz · Accepted Answer · 2021-06-27 22:58:42Z

1

You need to create a local variable, set its value, and then export the variable itself:

const generateNewArray = () => {

  var numberOfArrayItems = 40;
  var currentArray = Array.from({ length: numberOfArrayItems }, 
    () => Math.floor(Math.random() * 200) + 1);
  
  return currentArray;
}

const myRandomArray = generateNewArray();
export { myRandomArray }

answered Jun 27, 2021 at 22:58

Christian Fritz

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2 Comments

Cassiano Guimarães Over a year ago

Hey Christian, thanks for the answer! But i would like that the variable is the same anywhere in the application, but when i invoke the function the value of the variable changes. So: myRandomArray is gonna generate a array by default, but when i invoke the function generateNewArray() i would like the value of my variable to change as well. Do you know how to do it? Thank you for the support.

Christian Fritz Over a year ago

I don't understand exactly what it is you want. Can you add some example code to your question showing which sequence of function invocations and values you'd like?

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