Loop through array of object and if property match, then slice that object - Javascript

Question

I have array of objects, I am trying to loop through that array and if I find found a match, I wanna slice that object..

var object = [
  {
    "Name": 'Kshitij',
    "LastName": 'Rangari',
    "CountryBorn": 'India',
    "CountryStay": 'USA'
  },

  {
    "Name": 'Pratik',
    "LastName": 'Rangari',
    "CountryBorn": 'India',
    "CountryStay": 'Canada'
  },

  {
    "Name": 'Pratibha',
    "LastName": 'Rangari',
    "CountryBorn": 'India',
    "CountryStay": 'India'
  },

  {
    "Name": 'Ankita',
    "LastName": 'Raut',
    "CountryBorn": 'India',
    "CountryStay": 'Australia'
  },

  {
    "Name": 'Wayne',
    "LastName": 'Rooney',
    "CountryBorn": 'UK',
    "CountryStay": 'UK'
  }

]

console.log(object);

object.forEach(function(x){
  if (x.Name==='Kshitij'){

  }
})

object.map (obj =>{

  obj.AllFirstName = obj['Name'];
  console.log(obj['AllFirstName']);

})

console.log('------------------------------')

console.log(object);

I wanna loop through Object and want to find if Name === 'Kshitij' and Name ==='Pratik', I want to remove those objects from the array.

How would I do this ?

[`arr.forEach(function callback(currentValue, **index**, array) ...)`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/forEach). Also while calling an array `object` is technically correct it is a bit misleading here. — ASDFGerte, Aug 12 '17 at 16:15

Nina Scholz · Answer 1 · 2017-08-13T07:56:47.620

3

You could use return a filtered array, which filters out all the given values for a given key of the objects in the array.

const without = (key, values) => object => !values.includes(object[key]);

var array = [{ Name: 'Kshitij', LastName: 'Rangari', CountryBorn: 'India', CountryStay: 'USA' }, { Name: 'Pratik', LastName: 'Rangari', CountryBorn: 'India', CountryStay: 'Canada' }, { Name: 'Pratibha', LastName: 'Rangari', CountryBorn: 'India', CountryStay: 'India' }, { Name: 'Ankita', LastName: 'Raut', CountryBorn: 'India', CountryStay: 'Australia' }, { Name: 'Wayne', LastName: 'Rooney', CountryBorn: 'UK', CountryStay: 'UK' }];

console.log(array.filter(without('Name', ['Kshitij', 'Pratik'])));

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

edited Aug 13 '17 at 07:56

answered Aug 12 '17 at 16:15

Nina Scholz

376,160
25
347
392

You're taking the "requirement" stated as "remove" too seriously, which is leading you to the horrible suggestion to use `splice`, which then forces you to work backwards, or turn other somersaults. Furthermore, your logic seems to only remove the first occurrence. Not to mention that the whole thing is a dup of about eighteen other questions. – Aug 13 '17 at 05:03
@torazaburo, right, i take words seriously. and i have misread the question, but what the op wants was only later clear. anyway, now with filtering and using a staight fprward approach. btw, the dupe target is horrible. – Nina Scholz Aug 13 '17 at 08:00
Much better. Wrt the dup target, I am not happy about it either, but this question falls into the category of so incredibly basic that there doesn't seem to be a clean dup, sort of like a question about how to add two numbers in JS. – Aug 13 '17 at 11:34

Julian Zucker · Answer 2 · 2017-08-12T19:04:41.843

2

Use the builtin filter to remove all items that match a certain predicate. Then set the original object to the filtered list.

var namesToRemove = ['Kshitij', 'Pratik'];
object = object.filter(e => !namesToRemove.includes(e.Name))

edited Aug 12 '17 at 19:04

answered Aug 12 '17 at 16:14

Julian Zucker

564
4
13

1

_"I want to remove those objects from the array."_ `.filter()` returns a new array – guest271314 Aug 12 '17 at 16:17

kukkuz · Accepted Answer · 2017-08-12T16:19:00.887

1

Use filter() function to get a new array with the objects removed - see demo below:

var object=[{"Name":'Kshitij',"LastName":'Rangari',"CountryBorn":'India',"CountryStay":'USA'},{"Name":'Pratik',"LastName":'Rangari',"CountryBorn":'India',"CountryStay":'Canada'},{"Name":'Pratibha',"LastName":'Rangari',"CountryBorn":'India',"CountryStay":'India'},{"Name":'Ankita',"LastName":'Raut',"CountryBorn":'India',"CountryStay":'Australia'},{"Name":'Wayne',"LastName":'Rooney',"CountryBorn":'UK',"CountryStay":'UK'}];

var result = object.filter(function(e){
  return e.Name !== 'Kshitij' && e.Name !=='Pratik'
});

console.log(result);

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

edited Aug 12 '17 at 16:19

answered Aug 12 '17 at 16:15

kukkuz

41,512
6
59
95

_"I want to remove those objects from the array."_ `.filter()` returns a new array – guest271314 Aug 12 '17 at 16:18
yup, edited answer to reflect that... – kukkuz Aug 12 '17 at 16:19

Loop through array of object and if property match, then slice that object - Javascript

3 Answers3