Remove a null value from nested array of objects with conditions

Question

I have a data like this:

[
    {
        "title": "Chemist I",
        "class_id": "CMT1",
        "deptcode": "001",
        "c_title_id": 978,
        "duties_details": [
            {
                "accmp": [
                    {
                        "d_c": "2021-11-17T14:43:22",
                        "date": "Nov 17, 2021",
                        "empid": 67,
                        "posdrid": 48,
                        "remarks": "Net",
                        "accomp_id": 46,
                        "month_year": "NOVEMBER , 2021",
                        "approved_by": null,
                        "date_created": "2021-11-14T14:43:00",
                        "pc_review_item_id": 2
                    }
                ],
                "prcnt": 15,
                "dscrptn": "Troubleshoot Computer",
                "pos_drid": 48
            },
            {
                "accmp": null,
                "prcnt": 10,
                "dscrptn": "Test CMT Data",
                "pos_drid": 49
            }
        ]
    }
],
[
    {
        "title": "Computer Programmer I",
        "class_id": "COMPRO1",
        "deptcode": "001",
        "c_title_id": 177,
        "duties_details": [
            {
                "accmp": [
                    {
                        "d_c": "2021-11-17T14:43:08",
                        "date": "Nov 17, 2021",
                        "empid": 67,
                        "posdrid": 40,
                        "remarks": "test",
                        "accomp_id": 45,
                        "month_year": "NOVEMBER , 2021",
                        "approved_by": null,
                        "date_created": "2021-11-15T14:43:00",
                        "pc_review_item_id": 1
                    }
                ],
                "prcnt": 30,
                "dscrptn": "Develop system procedures/methods/functions based on the system design and report to the immediate head once completed",
                "pos_drid": 40
            },
            {
                "accmp": null,
                "prcnt": 15,
                "dscrptn": "Write code for software patches and bug fixes",
                "pos_drid": 42
            },
            {
                "accmp": null,
                "prcnt": 15,
                "dscrptn": "Run series/level of software tests to spot and resolve logical(bug) & syntactical errors",
                "pos_drid": 41
            },
            {
                "accmp": null,
                "prcnt": 10,
                "dscrptn": "Write encountered/reported/spotted system issues/errors/bugs into the issue features of version control system",
                "pos_drid": 45
            },
            {
                "accmp": null,
                "prcnt": 10,
                "dscrptn": "Write documentations to the created system procedures/methods/functions",
                "pos_drid": 44
            },
            {
                "accmp": null,
                "prcnt": 10,
                "dscrptn": "Review created system procedures/methods/functions for system efficiency",
                "pos_drid": 43
            },
            {
                "accmp": null,
                "prcnt": 10,
                "dscrptn": "Commit and push every complete & working changes made to the source code into the version control system",
                "pos_drid": 46
            }
        ]
    }
]

now based on the data, I want to remove the duties_details with a value of null from other positions but not in "class_id": "COMPRO1".

{
    "accmp": null,
    "prcnt": 10,
    "dscrptn": "Test CMT Data",
    "pos_drid": 49
}

I have tried like this but It returns undefined :

let filterDRData = DRData ? DRData.map((drdata) => {        
        if(drdata[0].class_id != "COMPRO1") {
            drdata[0].duties_details.map((dd) => {                
                return {
                    ...drdata,
                    duties_details:dd.filter(e => e.accmp == null)                      
                }
                    
            })
        }
    }):null

Besides the "class_id": "COMPRO1", Delete all nulls from the data — vueAng
– vueAng, Commented Nov 17, 2021 at 7:32

Todd Wong · Accepted Answer · 2021-11-17 07:32:09Z

1

You outer lambda does not return anything.

this should work:

let filterDRData = DRData ? DRData.map((drdata) => {        
    if(drdata[0].class_id != "COMPRO1") {
        drdata[0].duties_details = drdata[0].duties_details.filter(e => e.accmp != null);
    }
    return drdata; // ADD THIS LINE
}):null

edited Nov 17, 2021 at 7:32

answered Nov 17, 2021 at 7:15

Todd Wong

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4 Comments

Jc John Over a year ago

TypeError: dd.filter is not a function

Jc John Over a year ago

its the whole data which is the one that I am referring at the top

Todd Wong Over a year ago

Ohh, you should just filter the duties_details，map won't change the array's length, just transform every element. so maybe drdata[0].duties_details = drdata[0].duties_details.filter(e => e.accmp != null) instead of drdata[0].duties_details.map((dd) => .... I'll edit my answere

Jc John Over a year ago

life-saving!, thanks

vueAng · Accepted Answer · 2021-11-17 08:15:42Z

0

I wrote a whole case

const deepClone = obj => {
  let clone = Object.assign({}, obj);
  Object.keys(clone).forEach(
    key => {
      if (obj[key] == null) {
        delete obj[key]
      } else if (typeof obj[key] === 'object') {
        deepClone(obj[key])
      } else {
        return obj[key]
      }
    }
  );
  if (Array.isArray(obj)) {
    clone.length = obj.length;
    return Array.from(clone);
  }
  return clone;
};

const hasArr = (arr = []) => {
  const clone=[]
  arr.forEach(val => {
    if (val.class_id != 'COMPRO1') {
      clone.push(deepClone(val))
    }
  })
  return clone
}
console.log(JSON.stringify(hasArr(arr), null, 4));

answered Nov 17, 2021 at 8:15

vueAng

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