组合与JSON中的键关联的所有值

Question

我有一个json字符串，如下所示

[{"_id":"9/17/2015","amt1":0,"amt2":13276.5},{"_id":"9/18/2015","amt1":8075,"amt2":6445.5}]

预期结果：

[{"_id": ["9/17/2015", "9/18/2015"], "amt1": [0, 8075], "amt2": [13276.5, 6445.5]}]

这是否可以在没有循环的情况下实现。由于json可能有超过500条记录..

可以帮助获得所需的输出..

Answer 1

你去：

＆＃13;

＆＃13;

var data = [{"_id":"9/17/2015","amt1":0,"amt2":13276.5},{"_id":"9/18/2015","amt1":8075,"amt2":6445.5}];

var groupByKeys = function(data) {
  var obj = {};
  for(var i in data) {
    var curr = data[i];
    for(var key in curr) {
      if(!obj[key]) obj[key] = [];
      obj[key].push(curr[key]);
    }
  }
  
  return obj;
}

document.write(JSON.stringify(groupByKeys(data)));

＆＃13;

＆＃13;

＆＃13;