Delete from object if Item exists and then push again

Question

I have the array as follows, I want to first check if the record in array already exists, and then push the similar record.

    arr1 = [{
        'Name': 'Ken',
         'Id' : 123,
         'Units' : 100
    }, {
        'Name': 'Kris',
        'Id': '223',
        'Units' : 100 
    }, {
        'Name': 'Ben',
        'Id': '229',
        'Units' : 100
    },
     {
        'Name': 'Alex',
        'Id': '222',
        'Units' : 100
    }]

Now suppose I want to add a similar record

{
        'Name': 'Ken',
         'Id' : 123,
         'Units' : 50
}

Here only the value of Units have been changed and sometimes it may also remain same.

What I want is remove the initial similar record (check by Id) and push the new one.

So my final array should be like

arr1 = [{
        'Name': 'Ken',
         'Id' : 123,
         'Units' : 100
    }, {
        'Name': 'Kris',
        'Id': '223',
        'Units' : 100 
    }, {
        'Name': 'Ben',
        'Id': '229',
        'Units' : 100
    },
     {
        'Name': 'Alex',
        'Id': '222',
        'Units' : 100
    }]

Possible duplicate of [Find object by id in array of javascript objects](http://stackoverflow.com/questions/7364150/find-object-by-id-in-array-of-javascript-objects) — Abhitalks, Nov 26 '15 at 08:34

CoderPi · Answer 1 · 2015-11-26T08:47:31.650

1

var newRecord = {
    'Name': 'Ken',
    'Id': 123,
    'Units': 50
};

arr1 = arr.filter(function (el) {
    return el.Id != newRecord.Id;
});

arr1.push(newRecord);

Demo:

arr1 = [{
  'Name': 'Ken',
  'Id': 123,
  'Units': 100
}, {
  'Name': 'Kris',
  'Id': '223',
  'Units': 100
}, {
  'Name': 'Ben',
  'Id': '229',
  'Units': 100
}, {
  'Name': 'Alex',
  'Id': '222',
  'Units': 100
}]

var newRecord = {
  'Name': 'Ken',
  'Id': 123,
  'Units': 50
};

arr1 = arr1.filter(function(el) {
  return el.Id != newRecord.Id;
});

arr1.push(newRecord);

alert(JSON.stringify(arr1));

edited Nov 26 '15 at 08:47

answered Nov 26 '15 at 08:40

CoderPi

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The OP said: What I want is remove the initial similar record (check by Id) and push the new one. – Ziki Nov 26 '15 at 08:46

Neil · Answer 2 · 2015-11-26T09:11:33.507

0

filter out the old record based on the pertinent property and add the new one.

similarRecord = {
  id = 123
  ...
}

_arr1 = arr1.filter(function(obj){
  return obj.id != similarRecord.id
})

_arr1.push(similarRecord)

edited Nov 26 '15 at 09:11

answered Nov 26 '15 at 08:36

Neil

1
2

it will also remove all elements from the array – CoderPi Nov 26 '15 at 09:08
sure does. in coffeescript land with auto return. thanks @CodeiSir. – Neil Nov 26 '15 at 09:08
This clearly tagged as javascript. And in javascript it wont work – CoderPi Nov 26 '15 at 09:16

Delete from object if Item exists and then push again

2 Answers2