Get index in object javascript

you can use filter method

 const filteredData = data.filter(e => e.name !== 'john');

answered Nov 22, 2021 at 15:32

Sakhri HoussemSakhri Houssem

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Just go through your array and find the position:

var i = 0;
for(var item in Data) {
    if(Data[item].name == 'John')
        break;
    i++;
}
alert(i);

answered Aug 24, 2011 at 14:24

Sascha GalleySascha Galley

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4

let indexOf = -1;
let theProperty = "value"
let searchFor = "something";

theArray.every(function (element, index) {

    if (element[theProperty] === searchFor) {
        indexOf = index;
        return false;
    }
    return true;
});

answered Sep 4, 2017 at 16:54

collection.findIndex(item => item.value === 'smth') !== -1

answered Jan 26, 2018 at 16:08

2

You can use Array.sort using a custom function as a parameter to define your sorting mechanism.

In your example, it would give:

var Data = [
    {id_list:1, name:'Nick',token:'312312'},{id_list:2,name:'John',token:'123123'}
]

Data.sort(function(a, b){
    return a.name < b.name ? -1 : a.name > b.name ? 1 : 0;
});

alert("First name is : " + Data[0].name); // alerts 'John'
alert("Second name is : " + Data[1].name); // alerts 'Nick'

The sort function must return either -1 if a should come before b, 1 if a should come after b and 0 if both are equal. It's up to you to define the right logic in your sorting function to sort the array.

Missed the last part of your question where you want to know the index. You would have to loop through the array to find that as others have said.

answered Aug 24, 2011 at 14:24

This might be useful:

function showProps(obj, objName) {
  var result = "";
  for (var i in obj)
    result += objName + "." + i + " = " + obj[i] + "\n";
  return result;
}

I copied this from Working with objects.

answered Feb 4, 2012 at 8:46

AshishAshish

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Use a small workaround:

Create a new array with names as indexes. After that all searches will use indexes. So, only one loop. After that you don't need to loop through all elements!

var Data = [
    {id_list:1, name:'Nick',token:'312312'},{id_list:2,name:'John',token:'123123'}
    ]
var searchArr = []
Data.forEach(function(one){
  searchArr[one.name]=one;
})
console.log(searchArr['Nick'])

http://jsbin.com/xibala/1/edit

Live example.

answered Jan 24, 2015 at 9:01

1

I extended Chris Pickett's answer, because in my case I needed to search deeper than one attribute level:

function findWithAttr(array, attr, value) {
  if (attr.indexOf('.') >= 0) {
    var split = attr.split('.');
    var attr1 = split[0];
    var attr2 = split[1];
    for(var i = 0; i < array.length; i += 1) {
      if(array[i][attr1][attr2] === value) {
        return i;
      }
    }
  } else {
    for(var i = 0; i < array.length; i += 1) {
      if(array[i][attr] === value) {
        return i;
      }
    }
  };
};

You can pass 'attr1.attr2' into the function.

answered Nov 30, 2015 at 17:38

Ed SheeEd Shee

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Use this:

Data.indexOf(_.find(Data, function(element) {
  return element.name === 'John';
}));

It is assuming you are using Lodash or Underscore.js.

answered Jan 18, 2017 at 11:46

ElloneEllone

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var fields = {
  teste:
  {
    Acess:
    {
      Edit: true,
      View: false
    }
  },
  teste1:
  {
    Acess:
    {
      Edit: false,
      View: false
    }
  }
};

console.log(find(fields,'teste'));

function find(fields,field) {
  for(key in fields) {
    if(key == field) {
      return true;
    }
  }
  return false;
}

If you have one Object with multiple objects inside, if you want know if some object are include on Master object, just use find(MasterObject, 'Object to Search'). This function will return the response if it exists or not (TRUE or FALSE). I hope to help with this - can see the example on JSFiddle.

answered Jul 18, 2017 at 14:40

2

If you want to get the value of the property token then you can also try this:

    let data=[
      { id_list: 1, name: 'Nick', token: '312312' },
      { id_list: 2, name: 'John', token: '123123' },
    ]

    let resultingToken =  data[_.findKey(data,['name','John'])].token

where _.findKey is a Lodash function.

answered Nov 14, 2019 at 12:00

Akash SinghAkash Singh

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You can use findIndex in Lodash library.

Example:

var users = [
{ 'user': 'barney',  'active': false },
{ 'user': 'fred',    'active': false },
{ 'user': 'pebbles', 'active': true }
            ];

_.findIndex(users, function(o) { return o.user == 'barney'; });
// => 0

// The `_.matches` iteratee shorthand.
_.findIndex(users, { 'user': 'fred', 'active': false });
// => 1

// The `_.matchesProperty` iteratee shorthand.
_.findIndex(users, ['active', false]);
// => 0

// The `_.property` iteratee shorthand.
_.findIndex(users, 'active');
// => 2

answered Aug 29, 2021 at 12:22

Iman MarashiIman Marashi

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Alternatively to German Attanasio Ruiz's answer, you can eliminate the second loop by using Array.reduce() instead of Array.map();

var Data = [
    { name: 'hypno7oad' }
]
var indexOfTarget = Data.reduce(function (indexOfTarget, element, currentIndex) {
    return (element.name === 'hypno7oad') ? currentIndex : indexOfTarget;
}, -1);

answered Nov 4, 2014 at 20:45

hypno7oadhypno7oad

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Maybe the Object.keys, Object.entries, and Object.values methods might help.

answered Apr 5 at 1:44

milahmilah

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1

Using Underscore.js:

var index = _.indexOf(_.pluck(item , 'name'), 'Nick');

answered Mar 10, 2020 at 6:04

M Faisal HameedM Faisal Hameed

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