Check if an array of objects exists

Question

I have an array of objects:

items: [
  { name: "Cheese Puffs", price: 3 },
  { name: "Can of Soda", price: 1.75 }
];

I want to do something like items["cheesePuffs"] === true. But as it is in an array it won't work properly.

You should fix the syntax of the code in your question. Semicolons don't belong inside of an object literal like that. — Brad, Sep 02 '19 at 07:02
The duplicate given has answers that doesn't necessarily match my requirements. — , Sep 02 '19 at 07:04
not duplicate, according to this question, OP wants to check is there any object in array or not, and marked duplicate question is for, is any key available in object !! — Dupinder Singh, Sep 02 '19 at 07:07

score 3 · Accepted Answer · answered Sep 02 '19 at 07:00

3

What you want is Array.find().

myArrOfObjects.find(el => el.cheesePuffs);

Assuming the property you're looking for is truthy, this returns the element, {cheesePuffs: "yes"} which is truthy. If it weren't found, it would be undefined.

answered Sep 02 '19 at 07:00

Brad

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score 2 · Answer 2 · answered Sep 02 '19 at 07:02

You can use some and hasOwnProperty, If you need actual value instead of Boolean values you can use find instead of some

const myArrOfObjects = [{
  cheesePuffs: "yes"
},
{
  time: "212"
}];

let findByName = (name) => {
  return myArrOfObjects.some(obj=> {
    return obj.hasOwnProperty(name)
  })
}

console.log(findByName("cheesePuffs"))
console.log(findByName("time"))
console.log(findByName("123"))

score 1 · Answer 3 · edited Sep 02 '19 at 08:28

1

You can use find

let exist = myArrOfObjects.find(o => o.cheesePuffs === 'yes')

edited Sep 02 '19 at 08:28

Ignacio Lago

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answered Sep 02 '19 at 07:06

alaadine andolsi

11
1

1

read code of conduct: https://stackoverflow.com/conduct. Use code snippet to write code. – Dupinder Singh Sep 02 '19 at 07:13
i.e. use ` and to end it use ` – Sep 02 '19 at 07:24

score 1 · Answer 4 · answered Sep 02 '19 at 07:11

okay simple solutions

try this

const x = [{}];

if(x.find(el => el.cheesePuffs) == undefined)
  console.log("empty objects in array ")
  
const myArrOfObjects = [{
  cheesePuffs: "yes"
},
{
  time: "212"
}];


if(myArrOfObjects.find(el => el.cheesePuffs) == undefined)
  console.log("empty objects in array ")
  else
  console.log("objects available in array ")

Suhaib Janjua · Answer 5 · 2019-09-02T07:21:03.700

1

Try the following code. It will return you the object where name matches to 'Cheese Puffs'.

let items = [{
    name: "Cheese Puffs",
    price: 3
  },
  {
    name: "Can of Soda",
    price: 1.75
  }
];

let itemExist = items.find(x => x.name === 'Cheese Puffs');

if (itemExist) {
  console.log(itemExist);
} else {
  console.log("Item not Exist");
}

edited Sep 02 '19 at 07:21

answered Sep 02 '19 at 07:15

Suhaib Janjua

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score 1 · Answer 6 · answered Sep 02 '19 at 07:20

As suggestion, you can also decide to not use an array, but to use a json object, where the index of each item is the unique name of your objects (in the example "cheesePuffs" identifies "Cheese Puffs")

let items = {
"cheesePuffs": {name: "Cheese Puffs",price: 3},
"canOfSoda": {name: "Can of Soda",price: 1.75},
};

console.log("exist: ", items.cheesePuffs!== undefined)
console.log(items.cheesePuffs)
// can also access to item in this way:
console.log(items["cheesePuffs"])

console.log("not exist", items.noCheesePuffs!== undefined)
console.log(items.noCheesePuffs)

score 0 · Answer 7 · answered Sep 02 '19 at 07:06

First of all you have an array of objects so you can't simply use

myArrOfObjects["cheesePuffs"]

because array required an index so it should be myArrOfObjects[0]["cheesePuffs"]

let items = [
  { name: "Cheese Puffs", price: 3 },
  { name: "Can of Soda", price: 1.75 }
];


let filter = items.find( el => el.price === 3 );

console.log(filter);

another approach

  let items = [
      { name: "Cheese Puffs", price: 3 },
      { name: "Can of Soda", price: 1.75 }
    ];


    let filter = items.filter( el => el.price === 3 );

    console.log(filter);

Check if an array of objects exists

7 Answers7