refractor this code in useful functions: in javascript

To refactor the code into useful functions in JavaScript, you can follow these steps:

Step 1: Analyze the code and identify the portions that can be separated into functions. Look for portions that perform repetitive tasks or can be logically grouped.

Step 2: Define the functions based on the identified portions of code. Each function should have a clear purpose and perform a specific task.

Step 3: Extract the relevant code from the original code into the newly defined functions.

Step 4: Modify the original code to call the newly created functions instead of repeating the code.

Here's an example of how you can refactor a piece of code into useful functions:

index.tsx
// Original code
function getRandomNumber() {
  const randomNumber = Math.floor(Math.random() * 10) + 1;
  return randomNumber;
}

function generateRandomArray() {
  const randomArray = [];
  
  for (let i = 0; i < 5; i++) {
    const randomNumber = getRandomNumber();
    randomArray.push(randomNumber);
  }
  
  return randomArray;
}

const numbers = generateRandomArray();
console.log(numbers);

// Refactored code using useful functions
function getRandomNumber() {
  return Math.floor(Math.random() * 10) + 1;
}

function generateRandomArray(length) {
  const randomArray = [];
  
  for (let i = 0; i < length; i++) {
    const randomNumber = getRandomNumber();
    randomArray.push(randomNumber);
  }
  
  return randomArray;
}

const numbers = generateRandomArray(5);
console.log(numbers);
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In this example, the code was initially a single function that generated a random array of numbers. It was refactored into two functions: getRandomNumber() to generate a random number, and generateRandomArray() to create an array with a specified length using getRandomNumber() function. The original code was modified to use these functions for better code organization and reusability.