match value from object to another array in js

Question

Hello i have an array object i have to find values from object with match array keys below is array and object i tried but not getting the result

var filterkey = [a,b,c];
var palistarray = [{
{
            "Id": 199,
            "a": "Rajesh Tamore",
            "b": "23/11/2022",
            "c": "23/11/2022",
            "d": "W"
        },
        {
            "Id": 200,
            "a": "Sunil N",
            "b": "21/11/2022",
            "c": "21/11/2022",
            "d": "S"
        },
}]

i want result like below


[{
{
            "a": "Rajesh Tamore",
            "b": "23/11/2022",
            "c": "23/11/2022",
        },
        {
            "a": "Sunil N",
            "b": "21/11/2022",
            "c": "21/11/2022",
        },
}]

i had tried below code

 palistarray.find((item,index) => {
    console.log(item[filterkey[index]]);
  });

Pishameni · Accepted Answer · 2022-12-19 08:52:02Z

1

Try using the Array.prototype.map(), Object.keys() and Object.prototype.hasOwnProperty() functions like this:

const result = palistarray.map((obj) => {
    const newObj = {};
    Object.keys(obj).forEach((key) => {
        if (filterkey.includes(key) && obj.hasOwnProperty(key)) {
            newObj[key] = obj[key];
        }
    });
    return newObj;
});

answered Dec 19, 2022 at 8:52

Pishameni

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Comments

Pavel Sturov · Accepted Answer · 2022-12-19 08:57:02Z

0

You can write your own function, like this:

const filterkey = ['a', 'b', 'c']

const palistarray = [
  {
    'Id': 199,
    'a':  'Rajesh Tamore',
    'b':  '23/11/2022',
    'c':  '23/11/2022',
    'd':  'W',
  }, {
    'Id': 200,
    'a':  'Sunil N',
    'b':  '21/11/2022',
    'c':  '21/11/2022',
    'd':  'S',
  },
]

const filterBy = (array, predicate) => array.map(value => {
  const result = {}

  predicate.forEach(key => {
    if (value[key]) {
      result[key] = value[key]
    }
  })

  return result
})

const result = filterBy(palistarray, filterkey)

console.log(result)

Best regards!

answered Dec 19, 2022 at 8:57

Pavel Sturov

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Comments

Adam Pearson · Accepted Answer · 2022-12-19 08:59:31Z

I have to presume your array should be this, without the extra curly braces:

var palistarray = [{

            "Id": 199,
            "a": "Rajesh Tamore",
            "b": "23/11/2022",
            "c": "23/11/2022",
            "d": "W"
        },
        {
            "Id": 200,
            "a": "Sunil N",
            "b": "21/11/2022",
            "c": "21/11/2022",
            "d": "S"
       },
];

A really simple way would be this:

const filterArray = ["a", "b", "c"];

const palistarray = [{

            "Id": 199,
            "a": "Rajesh Tamore",
            "b": "23/11/2022",
            "c": "23/11/2022",
            "d": "W"
        },
        {
            "Id": 200,
            "a": "Sunil N",
            "b": "21/11/2022",
            "c": "21/11/2022",
            "d": "S"
       },
];

const mapped = palistarray.map(item => {
  const data = {};
  filterArray.forEach(key => {
    data[key] = item[key];
  })
  return data;
});

console.log(mapped);

It's just a case of mapping and returning the specified keys from the objects

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