js模拟平铺分组列表

function flattenGroupedList(list) {
  let result = [];

  function flatten(item, groupKey) {
    if (Array.isArray(item)) {
      item.forEach((subItem, index) => {
        flatten(subItem, groupKey ? `${groupKey}[${index}]` : `${index}`);
      });
    } else {
      result.push({ value: item, groupKey });
    }
  }

  flatten(list, '');
  return result;
}

// 示例使用
const nestedList = [
  'A',
  ['B', 'C'],
  ['D', ['E', 'F']],
  'G'
];

console.log(flattenGroupedList(nestedList));

function flattenGroupedListIteratively(list) {
  let result = [];
  let stack = [{ list, groupKey: '' }];

  while (stack.length > 0) {
    let { list, groupKey } = stack.pop();

    if (Array.isArray(list)) {
      for (let i = list.length - 1; i >= 0; i--) {
        stack.push({ list: list[i], groupKey: `${groupKey}[${i}]` });
      }
    } else {
      result.push({ value: list, groupKey });
    }
  }

  return result;
}

// 示例使用
console.log(flattenGroupedListIteratively(nestedList));