下划线嵌套对象的过滤器数组

Question

I have the following array of objects:

[{key: "test", values: [{key: "2015-05", values: [{1:2}, {3:4}]}, {}], ...]

I want to filter by the key value to only be left with values after a certain date.

I currently have this, but the resulting the structure is wrong

_.map(temp1, function(value, key) { return _.filter(value.values, function(v) { return v.key > "2015-05"; }); });

Answer 1

Slight improvement on Frank's answer :

 var data = [ { key: "1", values: [ {key: "2014-05", values: [{1:2}, {3:4}]}, {key: "2015-05", values: [{1:2}, {3:4}]}, {key: "2013-05", values: [{1:2}, {3:4}]} ] }, { key: "2", values: [ {key: "2014-05", values: [{1:2}, {3:4}]}, {key: "2015-05", values: [{1:2}, {3:4}]}, {key: "2013-05", values: [{1:2}, {3:4}]} ] } ]; var a = _.map(data, (d) => { d.values = _.filter(d.values, (v) => v.key > "2014"); return d; }); console.log(a); 

 <script src="https://cdnjs.cloudflare.com/ajax/libs/underscore.js/1.8.3/underscore-min.js"></script> 

No need to parse this date format, a string comparison will suffice. Important to note, despite the _.map operation, this will modify the original.

Answer 2

Something like this maybe?

var data = [
  {
    key: "1", 
    values: [
      {key: "2014-05", values: [{1:2}, {3:4}]},
      {key: "2015-05", values: [{1:2}, {3:4}]},
      {key: "2013-05", values: [{1:2}, {3:4}]}
    ]
  },
  {
    key: "2", 
    values: [
      {key: "2014-05", values: [{1:2}, {3:4}]},
      {key: "2015-05", values: [{1:2}, {3:4}]},
      {key: "2013-05", values: [{1:2}, {3:4}]}
    ]
  }
];

var a = _.map(data, (d) => {
  d.values = _.filter(d.values, (v) => {
    return Date.parse(v.key) > Date.parse("2014");
  });
  return d;
});