如何将JSON中的对象数组转换为仅包含值的数组？

Question

我需要转换

[{"document_id":"1"},{"document_id":"4"},{"document_id":"3"},{"document_id":"10"},{"document_id":"11"},{"document_id":"2"}]

要

["1","4","3","10","11","2"]

Answer 1

你可以使用：

{{1}}

Answer 2

尝试使用for in循环，.splice()，Object.keys()

var arr = [{
  "document_id": "1"
}, {
  "document_id": "4"
}, {
  "document_id": "3"
}, {
  "document_id": "10"
}, {
  "document_id": "11"
}, {
  "document_id": "2"
}];

for (var prop in arr) {
  arr.splice(prop, 1, arr[prop][Object.keys(arr[prop])[0]]);
};
 
console.log(arr);