如何在几个数组中生成元素的组合？

function generateCombination(combination, index, arrays, result) {
  if (index >= arrays.length) {
    result.push(combination.slice());
    return;
  }
  
  var currentArray = arrays[index];
  for (var i = 0; i < currentArray.length; i++) {
    combination.push(currentArray[i]);
    generateCombination(combination, index + 1, arrays, result);
    combination.pop();
  }
}

function generateCombinations(arrays) {
  var result = [];
  generateCombination([], 0, arrays, result);
  return result;
}

// 示例用法
var arrays = [[1, 2], [3, 4], [5, 6]];
var combinations = generateCombinations(arrays);
console.log(combinations);

[
  [1, 3, 5],
  [1, 3, 6],
  [1, 4, 5],
  [1, 4, 6],
  [2, 3, 5],
  [2, 3, 6],
  [2, 4, 5],
  [2, 4, 6]
]