how to filter object in javascript using filter function?

Question

I am trying to filter javascript object using filter function .But I am getting error key is not defined .here is my code https://jsfiddle.net/13n8n3om/

var arr=[
  {
    "EX": {

      "division": "abc",
      "is_active": true,

    }
  },
 {
    "PY": {

      "division": "pqwww",
      "is_active": false,

    }
  }
];

 arr = arr.filter(function(obj) {
                return obj[key] !== 'EX';
            });

            console.log(arr)

Expected output

[

 {
    "PY": {

      "division": "pqwww",
      "is_active": false,

    }
  }
]

obj.hasOwnProperty('EX') should work. @Andy it may not work if obj has more than one properties. — rhgb
– rhgb, Commented Mar 28, 2016 at 9:43

Nina Scholz · Accepted Answer · 2016-03-28 09:42:32Z

1

Just check the key of the object if it is unequal with the given string.

var arr = [{ "EX": { "division": "abc", "is_active": true, } }, { "PY": { "division": "pqwww", "is_active": false, } }];

arr = arr.filter(function (obj) {
    return Object.keys(obj)[0] !== 'EX';
});

document.write('<pre>' + JSON.stringify(arr, 0, 4) + '</pre>');

answered Mar 28, 2016 at 9:42

Nina Scholz

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Comments

gurvinder372 · Accepted Answer · 2016-03-28 09:42:23Z

1

replace

return obj[key] !== 'EX';

with

return Object.keys(obj)[0] !== 'EX';

basically you need to access the first property of obj and key is undefined.

edited Mar 28, 2016 at 9:42

answered Mar 28, 2016 at 9:38

gurvinder372

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1 Comment

gurvinder372 Over a year ago

@user944513 correct it again... Nina's answer should work for you.

aphextwix · Accepted Answer · 2016-03-28 09:47:14Z

0

You need to check that the obj isn't EX like so :

arr = arr.filter(function(obj, key) {
          if (! obj.EX) {
              return obj;
          }
       });

answered Mar 28, 2016 at 9:47

aphextwix

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