how to get array of objects based on object list in javascript

Question

I have array of object and object in which have to

check the arrobj code and obj value are same,
if above condition ok, then check the obj idtype and arrobj code

is same or obj.idtype value exists then return array list or return []

of object in javascript

var arrobj = [
  {id:1, code: "brown", type: "FR"},
  {id:3, code: "black", type: "SP"},
 {id:4, code: "blue", type: "FR"}
]

var obj={
  id:20, idtype: "SG", value: "blue"
}

Expected Output
// arrobj.code and obj.value matches, obj.idtype and arraobj.type not same
[]

var arrobj2 = [
  {id:1, code: "brown", type: "FR"},
  {id:3, code: "green", type: "SP"},
 {id:4, code: "blue", type: "FR"},
{id:5, code: "blue", type: "SG"}
]

var obj2={
  id:20, idtype: "SG", value: "blue"
}

Expected Output
// arrobj.code and obj.value matches, obj.idtype value exists in arraobj.type
[
{id:4, code: "blue", type: "FR"},
{id:5, code: "blue", type: "SG"}
]

@jeremy-denis thanks for reply, because arrobj2.code and obj2.code matches but not type and idtype — code123
– code123, Commented Apr 15, 2022 at 13:15
@jeremy-denis 2nd point `then check the obj idtype and arrobj code is same or obj.idtype value exists then return that code matched array list — code123
– code123, Commented Apr 15, 2022 at 13:18
Second check - If obj.idtype and arrobj.code is same then obviously obj.idtype is exist. So we can chek only if obj.idtype is exist. — A1exandr Belan
– A1exandr Belan, Commented Apr 15, 2022 at 13:33
@A1exandrBelan thanks for reply, yes, i mean the obj.idtype value should check — code123
– code123, Commented Apr 15, 2022 at 13:47

Daniel Santana · Accepted Answer · 2022-04-15 14:03:36Z

If you want to filter a javascript object array (code: equal and type: non equal) you can use the filter method.

const sampleCars1 = [
  {id: 1, code: "brown", type: "FR"},
  {id: 2, code: "black", type: "SP"},
  {id: 3, code: "green", type: "Y1"},
  {id: 4, code: "blue", type: "FR"}
];

const sampleCars2 = [
  {id: 1, code: "brown", type: "FR"},
  {id: 2, code: "black", type: "X1"},
  {id: 3, code: "green", type: "SP"},
  {id: 4, code: "blue", type: "FR"},
  {id: 5, code: "blue", type: "SG"},
  {id: 6, code: "blue", type: "A1"},
  {id: 7, code: "blue", type: "A2"}
];

const filterCars = (cars, desiredCode, undesiredType) => {
  return cars.filter(item => 
                        item.code === desiredCode && item.type !== undesiredType);
}

const filterSampleLists = () => {
  const filter = {id:20, type: "SG", code: "blue"};
  const filteredSample1 = filterCars(sampleCars1, filter.code, filter.type);
  const filteredSample2 = filterCars(sampleCars2, filter.code, filter.type);

  console.log(filteredSample1);
  console.log(filteredSample2);
}

filterSampleLists();

Mozilla Documentation:

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/filter

Similar Questions:

Find object by id in an array of JavaScript objects

Get JavaScript object from array of objects by value of property

Bonus:

always use meaningful names
use let/const instead of var. Check let statement for more.

A1exandr Belan · Accepted Answer · 2022-04-15 14:34:58Z

1

It seems to fit your conditions

const arrobj1 = [{id:1, code: "brown", type: "FR"},{id:3, code: "black", type: "SP"},{id:4, code: "blue", type: "FR"}];
const obj1 = { id:20, idtype: "SG", value: "blue" };

const arrobj2 = [{id:1, code: "brown", type: "FR"},{id:3, code: "green", type: "SP"},{id:4, code: "blue", type: "FR"},{id:5, code: "blue", type: "SG"}];
const obj2 = { id:20, idtype: "SG", value: "blue" };

const advFilter = (arr, obj) => {
    const filtered = arr.filter(({ code }) => code === obj.value);
    const types = filtered.map(({ type }) => type);
    return types.includes(obj.idtype) ? filtered : [];
};

console.log(advFilter(arrobj1, obj1));
console.log(advFilter(arrobj2, obj2));

.as-console-wrapper { max-height: 100% !important; top: 0; }

edited Apr 15, 2022 at 14:34

answered Apr 15, 2022 at 14:09

A1exandr Belan

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