how to get values from object array in javascript with condition

Question

I am trying to do something complex thing with array. I have array

   ORGANIZATIONS = [
    {

        "MAINID": "INAP1650001",
        "Status": "Approved"
    },
    {
        "MAINID": "INAP1650002",
        "Status": "Pending"
    },
    {
     "MAINID": "INAP1650003",
      "Status": "Approved"
    },
    {
      "MAINID": "INAP1650004",
         "Status": "Pending"
    },
    {
     "MAINID": "INAP1650005",
     "Status": "Approved"
    }
]

So I am trying to get all "MAINID" which status is "Approved" and want to create array of MAINID like MAINID_Array = [INAP1650001, INAP1650003,INAP1650005]
Could anybody help me please as I have tried using below but its give me all MAINID

var status = ''
var MAINID = ''
var MAINID_array = []
let len = ORGANIZATIONS.length

for (var i = 0; i < len; i++) {
    Status = ORGANIZATIONS[i].STATUS;
    MAINID = ORGANIZATIONS[i].MAINID;

    console.log('STATUS', Status);
    console.log('MAINID', MAINID);

        console.log('Approve STATUS', Status);

        MAINID_array.push(MAINID);

}

console.log(MAINID_array)

var result=ORGANIZATIONS.filter(i=>i.Status==="Approved").map(m=>m.MAINID); — Nonik
– Nonik, Commented Oct 14, 2020 at 19:10
I thought the same like most folks using Filter & Map: const MAINID_Array = ORGANIZATIONS.filter(organization => organization['Status'] === 'Approved').map(approvedOrganization => approvedOrganization['MAINID']); but the answer provided by stackoverflow.com/a/64360006/7377537 Derek.W using reduce is the best neat solution. — Vivek22
– Vivek22, Commented Oct 14, 2020 at 19:14

Derek Wang · Accepted Answer · 2020-10-14 19:08:42Z

4

Using Array.prototype.reduce, you can get the array of MAINID of which status is Approved.

const input = [{
    "MAINID": "INAP1650001",
    "Status": "Approved"
  },
  {
    "MAINID": "INAP1650002",
    "Status": "Pending"
  },
  {
    "MAINID": "INAP1650003",
    "Status": "Approved"
  },
  {
    "MAINID": "INAP1650004",
    "Status": "Pending"
  },
  {
    "MAINID": "INAP1650005",
    "Status": "Approved"
  }
];

const result = input.reduce((acc, cur) => (cur.Status === 'Approved' ? [ ...acc, cur.MAINID] : acc), []);
console.log(result);

answered Oct 14, 2020 at 19:08

Derek Wang

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Comments

Emiel Zuurbier · Accepted Answer · 2020-10-14 19:08:53Z

Use higher order functions like Array.prototype.filter() to get the organizations you want based on the Status property and Array.prototype.map() to return the MAINID from each organization to create an array of MAINID strings.

const ORGANIZATIONS = [{
    "MAINID": "INAP1650001",
    "Status": "Approved"
  },
  {
    "MAINID": "INAP1650002",
    "Status": "Pending"
  },
  {
    "MAINID": "INAP1650003",
    "Status": "Approved"
  },
  {
    "MAINID": "INAP1650004",
    "Status": "Pending"
  },
  {
    "MAINID": "INAP1650005",
    "Status": "Approved"
  }
];

const getApprovedOrganizations = organizations => organizations
  .filter(({ Status }) => Status === 'Approved')
  .map(({ MAINID }) => MAINID);
  
const MAINID_Array = getApprovedOrganizations(ORGANIZATIONS);
console.log(MAINID_Array);

Md Sabbir Alam · Accepted Answer · 2020-10-14 19:11:08Z

2

You can use map and filter to solve your problem.

const mainIds = ORGANIZATIONS.filter((item) => item.Status === 'Approved').map((item) => item.MAINID);

answered Oct 14, 2020 at 19:11

Md Sabbir Alam

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Comments

Luke · Accepted Answer · 2020-10-14 19:11:25Z

Here's the single line answer:

let ORGANIZATIONS = [
    {

        "MAINID": "INAP1650001",
        "Status": "Approved"
    },
    {
        "MAINID": "INAP1650002",
        "Status": "Pending"
    },
    {
     "MAINID": "INAP1650003",
      "Status": "Approved"
    },
    {
      "MAINID": "INAP1650004",
         "Status": "Pending"
    },
    {
     "MAINID": "INAP1650005",
     "Status": "Approved"
    }
]

let mainIdArray = ORGANIZATIONS.filter(x => x.Status === "Approved").map(x => x.MAINID);

console.log(mainIdArray);

Explanation:

.filter(x => x.Status === "Approved")

gets the organizations that Status === "Approved".

.map(x => x.MAINID)

gets the MAINID field of each organization.

Good luck!

Momo Setti · Accepted Answer · 2020-10-14 19:14:22Z

0

Use the following:

const MAINID_array =[];
ORGANIZATIONS.forEach(element =>{
       if (element['Status'] === "Approved"){
           MAINID_array.push(element['MAINID']);
       }  
})

answered Oct 14, 2020 at 19:14

Momo Setti

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