Javascript 更改JSON结构

我需要更改JSON结构，但我正在努力如何做到这一点，而且我也不确定我是否需要创建一个新对象，或者我可以只处理当前对象？ 无论如何，这是我要更改的JSON：

[
    {"document_name":"invoice_document.pdf"},
    {"Invoice Number":"18021573"}
]

到

收益率：

{
“文件名称”：“发票文件.pdf”，
“发票编号”：“18021573”
}“

您能给我们举一个例子，说明第一个数组中有多个对象时转换的效果吗？太好了，谢谢！

[
    {
       "document_name":"invoice_document.pdf",
       "Invoice Number":"18021573"
    }
]

let a = [
    {"document_name":"invoice_document.pdf"},
    {"Invoice Number":"18021573"}
];

// Use reduce on `a` because we know we want 1 after this is done.
// `Acc` is short for accumulator.
a = a.reduce((acc, i) => {

  // Use Object.keys to get access to the key names.
  Object.keys(i).map((key) => {

    // Append item onto the accumulator using its key and value
    // Warning: this will overwrite any existing `acc[key]` entries of the
    // same `key` value.
    acc[key] = i[key];
  })
  return acc;

  // This last Object here is what we start with when reduce runs the first time.
}, {});