如何通过TypeScript或JavaScript映射JSON结构以重新格式化并删除一些不需

Question

我收到来自添加了M和SS的数据库（DynamoDB）的响应。我只想要一个干净的结构。映射出来的最简单方法是什么？输入[{"M":{"usernameFormatOptionsCreate":{"SS":["sms"]}}},{"M":{"UsernameFormatOptionsChange":{"SS":["sms"]}}}]预期产量[ { "usernameFormatOptionsCreate": ["sms"] },{ "usernameFormatOptionsChange": ["sms"] }]

Answer 1

您可以使用Object.keys和Object.values获取第一个键和值，如下所示

let arr = [{"M": {"usernameFormatOptionsCreate": {"SS": ["sms"]}}}, {"M": {"UsernameFormatOptionsChange": {"SS": ["sms"]}}}];

let output = arr.map(function(c){

  let key = Object.keys(c.M)[0];

  let value = Object.values(c.M[key])[0];

  let result = {};

  result[key] = value;

  return result;

});

console.log(output)

Answer 2

let input = [{"M": {"usernameFormatOptionsCreate": {"SS": ["sms"]}}}, {"M": {"UsernameFormatOptionsChange": {"SS": ["sms"]}}}];

let output = input.map(({M}) => {

  let y = {};

  Object.entries(M).forEach(([key, {SS}]) => {

    y[key] = SS;

  });

  return y;

});

console.log(output);