在 JS 中将 JSON 更改为以下格式

Question

How do I change JSON of following format in javascript

data = [{acquired: "2018-03-09T22:49:52.935Z", mean_ndvi: -0.0483685}
{acquired: "2018-02-13T22:49:16.568Z", mean_ndvi: 0.00595065}
{acquired: "2018-04-01T22:50:30.912Z", mean_ndvi: -0.033455}]

to exactly

data = {"2018-03-09T22:49:52.935Z":-0.0483685, "2018-02-13T22:49:16.568Z": 0.00595065, "2018-04-01T22:50:30.912Z": -0.033455}

My attempt.

var json =data; var obj2 ={}; var obj3 =[]; 
for(var i = 0; i < json.length; i++) 
{ var obj = json[i]; 
obj2 = {[obj.acquired]:obj.mean_ndvi};
obj3.push(obj2); } 
console.log(obj3);

I'm able to get it in the following format.

 {2018-04-01T22:50:30.912Z: -0.033455}, 
 {2018-04-01T22:50:30.912Z: -0.033455}, 
 {2018-04-01T22:50:30.912Z: -0.033455}

Please check what changes can be made to get the result in one row.

Answer 1

You can use reduce() as follows (with some destructuring and spreading mixed in):

data.reduce((a, {acquired, mean_ndvi}) => ({[acquired]: mean_ndvi, ...a}), {});

Full snippet:

 const data = [ {acquired: "2018-03-09T22:49:52.935Z", mean_ndvi: -0.0483685}, {acquired: "2018-02-13T22:49:16.568Z", mean_ndvi: 0.00595065}, {acquired: "2018-04-01T22:50:30.912Z", mean_ndvi: -0.033455} ]; const result = data.reduce((a, {acquired, mean_ndvi}) => ({[acquired]: mean_ndvi, ...a}), {}); console.log(result);