let array = [
  {trid: 1, trname: "餐厅服务员", parent_id: 0, path: ",1,"},
  {trid: 2, trname: "公共营养师", parent_id: 0, path: ",2,"},
  {trid: 315, trname: "初级", parent_id: 314, path: "314,315,"},
  {trid: 5, trname: "初级", parent_id: 1, path: ",1,5,"}
];
// 设置要处理的属性名称
const pathLens = R.lensProp('path');
// 判断参数是否非空
const notEmpty = R.compose(R.not, R.isEmpty);
// 获取对象中指定属性，并分割成数组
const getPath = obj => R.view(pathLens)(obj).split(',');
// 只保留分割后数组的非空元素
const unEmptyPath = R.compose(R.filter(notEmpty), getPath);
// 将处理后的属性值保存至原对象中
const normalizePath = (obj) => {
  return R.set(pathLens)((unEmptyPath)(obj))(obj);
}
// 批处理对象数组
R.map(normalizePath, array);