假设有如下 smpList 数据结构，按 scd-mcd-pcd 作为 key 组织数据，希望转换为 按 scd-pcd-mcd 作为 key 组织数据，示例代码如下：
const smpList = [
{
"scd": "s001",
"mcd": "m001",
"list": [
{ "pcd": "NC"},
{ "pcd": "PT"},
{ "pcd": "OPT"},
]
},
{
"scd": "s001",
"mcd": "m002",
"list": [
{ "pcd": "NC"},
{ "pcd": "PT"},
{ "pcd": "OPT"},
]
},
{
"scd": "s002",
"mcd": "m001",
"list": [
{ "pcd": "DT"},
{ "pcd": "OPT"},
]
},
]
const spmList = smpList.reduce((result, currentItem) => {
currentItem.list.forEach(one=> {
const existingItem = result.find(item => item.scd === currentItem.scd && item.pcd === one.pcd);
if (existingItem) {
existingItem.list.push({ "mcd": currentItem.mcd});
} else {
result.push({
"scd": currentItem.scd,
"pcd": one.pcd,
"list": [{ "mcd": currentItem.mcd}]
});
}
})
return result;
}, []);
console.log("转换后:")
console.log(spmList)
返回的 spmList 就是 Array<SPM>了：
[
{
"scd": "s001",
"pcd": "NC",
"list": [
{ "mcd": "m001"},
{ "mcd": "m002"},
]
},
{
"scd": "s001",
"pcd": "PT",
"list": [
{ "mcd": "m001"},
{ "mcd": "m002"},
]
},
{
"scd": "s001",
"pcd": "OPT",
"list": [
{ "mcd": "m001"},
{ "mcd": "m002"},
]
},
{
"scd": "s002",
"pcd": "DT",
"list": [
{ "mcd": "m001"},
]
},
{
"scd": "s002",
"pcd": "OPT",
"list": [
{ "mcd": "m001"},
]
},
]