jQuery を使用して配列に要素を追加する

$(document).ready(function() {
  let array_1 = [];
  console.log('The array before adding new elements: ', array_1);
  // Push elements into the array using the
  // push method.
  array_1.push('23', '22');
  console.log('The array after adding new elements: ', array_1);
});

The array before adding new elements: Array []
The array after adding new elements: Array [ "23", "22" ]

$(document).ready(function() {
  let first_array = [9, 3, 6, 8];
  console.log('The array before addition: ', first_array)
  let second_array = [23, 12];

  // Merge the first and second arrays using
  // the merge function in jQuery
  $.merge(first_array, second_array);
  console.log('The array after addition: ', first_array);
});

The array before addition: Array(4) [ 9, 3, 6, 8 ]
The array after addition: Array(6) [ 9, 3, 6, 8, 23, 12 ]