how to display/differentiate data from json response - json

Question

I have following dynamic response in JSON, so I have one list object and I want to display and differentiate data using form_id. please tell me how to achieve this...
//list object
formsSummery: any = [];
this.formsSummery = (data[0] as any).data_points;
[ {
"job" : 10,
"data_points" : [ {
"user_id" : 11,
"ingest_time" : "2017-09-26T13:17:33.489Z",
"form_id" : 2,
"form_revision" : 1,
"device_id" : 0,
"field1" : "2.2",
"field2" : "two",
"field3" : "2",
"field4" : "1"
}, {
"user_id" : 11,
"ingest_time" : "2017-09-26T13:03:56.757Z",
"form_id" : 7,
"form_revision" : 1,
"device_id" : 0,
"field1" : "thirteen",
"field2" : "fourteen",
"field3" : "fifteen",
"field4" : "sixteen"
}, {
"user_id" : 11,
"ingest_time" : "2017-09-27T11:58:59.735Z",
"form_id" : 7,
"form_revision" : 1,
"device_id" : 0,
"field1" : "17",
"field2" : "TWENTY",
"field3" : "19",
"field4" : "1",
"field5master" : "EIGHTEEN",
"field6" : "TRUE"
}, {
"user_id" : 11,
"ingest_time" : "2017-09-26T07:23:26.468Z",
"form_id" : 7,
"form_revision" : 1,
"device_id" : 0,
"field1" : "five",
"field2" : "seven",
"field3" : "six",
"field4" : "eight"
}, {
"user_id" : 11,
"ingest_time" : "2017-09-26T07:24:14.729Z",
"form_id" : 7,
"form_revision" : 1,
"device_id" : 0,
"field1" : "nine",
"field2" : "eleven",
"field3" : "ten",
"field4" : "twele"
}, {
"user_id" : 11,
"ingest_time" : "2017-09-26T08:29:36.728Z",
"form_id" : 2,
"form_revision" : 1,
"device_id" : 0,
"field1" : "2.1",
"field2" : "one",
"field3" : "1",
"field4" : "true"
}, {
"user_id" : 11,
"ingest_time" : "2017-09-26T07:18:10.401Z",
"form_id" : 7,
"form_revision" : 1,
"device_id" : 0,
"field1" : "one",
"field2" : "three",
"field3" : "two",
"field4" : "four"
}, {
"user_id" : 11,
"ingest_time" : "2017-09-27T11:57:06.188Z",
"form_id" : 2,
"form_revision" : 1,
"device_id" : 0,
"field1" : "2.3",
"field2" : "THREE",
"field3" : "3",
"field4" : "TRUE"
} ]
} ]
I want to display data using form_id.
I want to display data in the table using form_id (all arrays for form_d=7 in one table) like this, and a number of table = number of form ids.

Answer 1

I would suggest first ordering your data_points array, with something like this post. Then use a Set to keep track of the form_id's in your array. As you filter, if the form_id is already in your Set, you'll ignore it.
Example:
let x = new Set();
const y = this.formsSummery[0].data_points.filter(z => {
return !x.has(z.form_id) ? x.add(z.form_id) : null
})
So if !x.has(z.form_id) evaluates to true, x.add(z.form_id) will be returned, which will also evaluate to true - and the desired object will be added to your filtered array.
enter image description here

Answer 2

var ret = 0
function filter(filterId) {
data = formsSummery[0].data_points;
for (i in data) {
if (data[i].form_id == filterId) {
if (ret != 0 && (new Date(data[i].ingest_time).getTime()) >= (new Date(ret.ingest_time).getTime())) {
ret = (data[i]);
}
else {
ret = (data[i])
}
}
}
return ret;
}
var result = filter(2) //your filter id
console.log(result)
not sure about date time