loadsh 对 现有一维数组 要求，把一维数组改为二维，保留 executeDept 例： {executeDept:"", list: []} ;

const _ = require('lodash');

/**
 * 将一维数组转换为按executeProcess分组的二维数组
 * @param {Array} arr - 原始一维数组
 * @returns {Array} 分组后的二维数组
 */
function transformArray(arr) {
  // 使用Lodash的groupBy按executeProcess分组
  const grouped = _.groupBy(arr, 'executeProcess');
  
  // 转换为所需的二维数组格式
  return _.map(grouped, (items, process) => {
    // 取第一个元素的executeDept作为组的executeDept
    const executeDept = items[0].executeDept || '';
    
    return {
      executeDept: executeDept,
      list: items.map(item => {
        // 复制原始对象并移除executeProcess和executeDept，保留其他属性
        const { executeProcess, executeDept, ...rest } = item;
        return rest;
      })
    };
  });
}

// 示例用法
const originalArray = [
  { executeDept: '部门A', executeProcess: '流程1', name: '项目1' },
  { executeDept: '部门A', executeProcess: '流程1', name: '项目2' },
  { executeDept: '部门B', executeProcess: '流程2', name: '项目3' },
  { executeDept: '部门B', executeProcess: '流程2', name: '项目4' },
  { executeDept: '部门C', executeProcess: '流程3', name: '项目5' }
];

const result = transformArray(originalArray);
console.log(result);