ForEach Javascript中的Foreach

Question

嗨，我怎么循环通过一个阵列，我已经环槽？因此，我预先预测了子数组，但仍然保留了旧的数组

array =  [
{
"DocNum": 210446, 
"DocType": "Test",
"DocumentLines": [
{
"LineNum": 0,
"ItemCode": "427"
}, 
{
"LineNum": 0,
"ItemCode": "34"
}
]
},
{
"DocNum": 210446, 
"DocType": "Test",
 "DocumentLines": [
{
  "LineNum": 0,
  "ItemCode": "427"
  }, 
  {
    "LineNum": 0,
    "ItemCode": "34"
    }
  ]
  }
 ]

for (let element of array) {
 newArray.push({
    key1: element.DocNum,
    key2: element.DocType,
    key3: element.DocumentLines[???].ItemCode
})}

所以数组最终看起来会是这样的

{ "key1":210446, "key2":Test, "key3": [{ItemCode: 34},{"ItemCode": 427}] }

Answer 1

您可以映射itemCodes

element.DocumentLines.map(v => v.ItemCode)

这将从第一个数组返回ItemCodes数组。