有没有人遇到过这个问题哈！对数组中的数据操作万分感谢

Question

letary=[{fileName:"文档1",nodeId:"1133275924701949952",},{fileName:"文档2",nodeId:"1133275743956807681",},{fileName:"文档3",nodeId:"1133275683449434112",},{fileName:"文档4",nodeId:"1133275743956807681",},{fileName:"文档5",nodeId:"1133275683449434112",},{fileName:"文档6",nodeId:"1133275924701949952",}]//将相同id的文件名以“，”拼接起来，放在数组中的一项得到=>["文档1，文档6","文档2,文档4","文档3，文档5"]，怎么写啊大佬们

Answer 1

functiontransformData(ary){
consttempObj=ary.reduce((prev,current)=>{
prev[current.nodeId]=prev[current.nodeId]||[];
prev[current.nodeId].push(current.fileName);
returnprev;
},{});
constresult=[];
for(letnodeIdintempObj){
constfileName=tempObj[nodeId];
result.push(fileName.join(','));
}
returnresult;
}