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"}]

至

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

Answer 1

您可以使用：

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

var new_arr = arr.map(function(item) {
   return item.document_id;
});

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);