CODEWITHSUNDEEP
javascriptarrays
UI_dev_99912381
UI_dev_99912381

Reputation: 9

How to get the count of values that are present in object in Javascript

I am trying to get the count of occurrences in the below object.

arr = [{"name":"rahul","age":23}, {"name":"Jack","age":22},{"name":"James","age":23}]

From the above array obj I want to get the count of people whose age is 23. In this case the expectation is 2.

I tried:

myArray.filter(x => x == searchValue).length;

But didn't get the exact answer as my declaration of array is different.

Please do let me know anyother way that I can use for this.

Upvotes: 1

Views: 45

Answers (5)

Siva Kondapi Venkata
Siva Kondapi Venkata

Reputation: 11001

Use destructuring in filter method.

const arr = [
  { name: "rahul", age: 23 },
  { name: "Jack", age: 22 },
  { name: "James", age: 23 }
];

const count = arr.filter(({ age }) => age === 23).length;

console.log(count);

Upvotes: 0

Mister Jojo
Mister Jojo

Reputation: 22320

something like that ?

const arr = 
      [ { "name": "rahul", "age": 23 } 
      , { "name": "Jack",  "age": 22 } 
      , { "name": "James", "age": 23 } 
      ] 

const countAge=x=>arr.reduce((a,c)=>a+=c.age==x?1:0,0)

console.log(countAge(23) )

Upvotes: 0

Sadaf Niknam
Sadaf Niknam

Reputation: 559

Try like below:

arr.filter(item => item.age == searchValue).length

Each item return object with {name:string, age:number} type. Then you should get age property of the item object and compare it with searchValue.

arr = [
  {"name":"rahul","age":23}, 
  {"name":"Jack","age":22},
  {"name":"James","age":23}
]
let searchValue = 23;

console.log(arr.filter(x => x.age == searchValue).length)

Upvotes: 1

ATHER
ATHER

Reputation: 3384

Try this

let persons = arr.filter(person => person.age===23)
console.log(persons.length);

Upvotes: 1

pierreavn
pierreavn

Reputation: 607

You should use .age to get the attribute value and filter on it:

arr = [
  {"name":"rahul","age":23},
  {"name":"Jack","age":22},
  {"name":"James","age":23}];
  
const count = arr.filter(x => x.age == 23).length;
console.log(count)

Upvotes: 2

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