Question

我有一个从应用程序前端获取的包含多个数组的JSON字符串。

String editList = [{"gradingId":"9","lowerLimit":"34","upperLimit":"55"},{"gradingId":"11","lowerLimit":"23","upperLimit":"45"},{"gradingId":"37","lowerLimit":"20","upperLimit":"35"}]

i获得单个元素

gradingId= 9
lowerLimit=34 
UpperLimit=55

以此类推。

有没有一种方法可以通过那里的名称访问gradingId，LowerLimit和upperLimit？

Answer 1

这将帮助您遍历数据

let editList = [{"gradingId":"9","lowerLimit":"34","upperLimit":"55"},{"gradingId":"11","lowerLimit":"23","upperLimit":"45"},{"gradingId":"37","lowerLimit":"20","upperLimit":"35"}]

editList.map(listItem => {
  Object.keys(listItem).map(objItem => {
    console.log(objItem +'=' + listItem[objItem])
  })
})

或者如果键是预定义的。您可以避免第二个循环，并使用以下代码。

let editList = [{"gradingId":"9","lowerLimit":"34","upperLimit":"55"},{"gradingId":"11","lowerLimit":"23","upperLimit":"45"},{"gradingId":"37","lowerLimit":"20","upperLimit":"35"}]

editList.map(listItem => {
  console.log("gradingId" +'=' + listItem["gradingId"])
  console.log("lowerLimit" +'=' + listItem["lowerLimit"])
  console.log("upperLimit" +'=' + listItem["upperLimit"])
})

Answer 2

let editList = [
{"gradingId":"9","lowerLimit":"34","upperLimit":"55"},
{"gradingId":"11","lowerLimit":"23","upperLimit":"45"},
{"gradingId":"37","lowerLimit":"20","upperLimit":"35"}]

editList.forEach((list,index) => {
   console.log(editList[index]);
)

您可以将forEach函数用于javascript中的数组。

Answer 3

使用Rank Reseller = RANKX(ALL('ResellerSales'[Resellerkey]), [Sales Amount])循环，Array方法等，以数组的形式遍历editList。
使用bracket notation将变量分配给Object属性。

for

editList[i][key]

拆分多数组json字符串

3 个答案: