使用JavaScript遍历数组的对象

Question

波纹管数据位于JavaScript的数组内。如何显示每个键的值？

[{
    "cities": [{
    "columnName": "Id"
  }, {
    "columnName": "Name"
  }, {
    "columnName": "Address"
  }, {
    "columnName": "Age"
  }]
}]

Answer 1

您可以使用forEach()

var data = [{"cities":[{"columnName":"Id"},{"columnName":"Name"},{"columnName":"Address"},{"columnName":"Age"}]}]

data[0].cities.forEach(n => console.log(n.columnName))