Change all null to '' in array of Objects (javascript)

Question

I have this array of objects shown below

Object {Results:Array[3]}
    Results:Array[3]
        [0-2]
             0:Object
                    id=null     
                    name: "Rick"
                    Value: "34343"
             1:Object
                    id=2     
                    name: null
                    Value: "2332"
             2:Object
                    id=2     
                    name:'mike'
                    Value: null

As you can see, in 1 object i have id as null, 2nd object has name as null and 3rd object has Value as null. Each object has some property as null.

I want to loop through all of these and replace null with ''. Can someone let me know how to achieve this...

You can do it by looping through all of the elements and replacing null with ''. — user663031
– user663031, Commented Sep 7, 2016 at 16:11

Jeremy Jackson · Accepted Answer · 2016-09-07 16:08:47Z

5

Here's something quick:

var results = [{
    id: null,
    name: "Rick",
    Value: "34343"
}, {
    id: 2,
    name: null,
    Value: "2332"
}, {
    id: 2,
    name: 'mike',
    Value: null
}];

results.forEach(function(object){
    for(key in object) {
        if(object[key] == null)
            object[key] = '';
    }
});

console.log(JSON.stringify(results, null, 2))

answered Sep 7, 2016 at 16:08

Jeremy Jackson

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Comments

casraf · Accepted Answer · 2018-03-23 14:44:54Z

3

You only needed to Google looping through objects. Here's an example:

Looping through every key (if your keys are unknown or you want to do the same for all keys)

for (const obj of arr) {
  if (typeof obj !=== 'object') continue;
  for (k in obj) {
    if (!obj.hasOwnProperty(k)) continue;
    v = obj[k];
    if (v === null || v === undefined) {
      obj[k] = '';
    }
  }
}

If your keys are known:

for (const obj of arr) {
  if (obj.name === undefined || obj.name === null) {
    obj.name = '';
  }
}

edited Mar 23, 2018 at 14:44

answered Sep 7, 2016 at 16:08

casraf

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Comments

Nina Scholz · Accepted Answer · 2016-09-07 16:08:41Z

2

You could iterate over the elements of the array and over the keys and assign the wanted strings if necessary.

var data = { Results: [{ id: null, name: "Rick", Value: "34343" }, { id: 2, name: null, Value: "2332" }, { id: 2, name: 'mike', Value: null }] };

data.Results.forEach(function (o) {
    Object.keys(o).forEach(function (k) {
        if (o[k] === null) {
            o[k] = '';
        }
    });
});

console.log(data);

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

answered Sep 7, 2016 at 16:08

Nina Scholz

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Comments

madox2 · Accepted Answer · 2016-09-07 16:09:22Z

2

You can look over your array and all keys and if the property contains null replace it with empty string, e.g.:

var arr = [
  { id=null name: "Rick" Value: "34343" },
  { id=2 name: null Value: "2332" },
  { id=2 name:'mike' Value: null }
];

arr.forEach(function(o) {
    Object.keys(o).forEach(function(key) {
      id (o[key] === null) {
        o[key] = '';
      }
    });
});

answered Sep 7, 2016 at 16:09

madox2

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Change all null to '' in array of Objects (javascript)

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Looping through every key (if your keys are unknown or you want to do the same for all keys)

If your keys are known:

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Looping through every key (if your keys are unknown or you want to do the same for all keys)

If your keys are known:

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