数组json数据重组

var arr = [
       {value: "颜色", detail: ["红"]},
       {value: "尺寸", detail: ["29cm", "30cm"]}] 

       let result = arr.reduce((res, item) => {
          return item.detail.reduce((list, ci) => {
          let nobj = {[item.value]: ci}
          let narr = res.length ? res.map(r => ({...r, ...nobj})) : [nobj]
          return list.concat(narr)
        }, [])
      }, [])

      console.log(result)

 result = [
  {颜色:红, 尺寸: 29cm},
  {颜色:红, 尺寸: 30cm},
 ]

笛卡尔乘积
　　　　　　　　

标签：重组,res,detail,value,item,json,result,数组,nobj
来源： https://www.cnblogs.com/yanghao-blogs/p/15503414.html