const arr1 = [1,2,3,4]
const arr2 = [5,6,7]

// arr1.push(...arr2)
console.log(arr1)
function mergeArrays(array1, array2) { 

  const mergedArray = []; 

  const maxLength = Math.max(array1.length, array2.length); 

  for (let i = 0; i < maxLength; i++) { 

    if (i < array1.length) mergedArray.push(array1[i]); 

    if (i < array2.length) mergedArray.push(array2[i]); 

  } 

  return mergedArray; 

} 

console.log(mergeArrays(arr1, arr2))
console.log(["sdas", null, undefined, false, "tsg","",0].filter(Boolean))


const items = [1, 2, 3];
console.log(items); // [1, 2, 3]

const reversedItems = items.reverse();
console.log(reversedItems); // [3, 2, 1]
console.log(items); // [1, 2, 3]