search for a specific property in array of objects and return boolean

user_14718856 0
Viewed 311

lets say i have an array of objects

    let arr = [
  {
    name: "john",
    age: 22
  },
  {
    name: "george",
    age: 55
  }
];

and an object

  let obj = {
    name: "bill",
    age: 55
  }

and i want to search all arr objects to find anyone with the same age as obj.age and return a boolean depending whether it includes a same property or not.

i can obviously do :

let find = arr.filter(i => i.age === obj.age);
let bool = find.length > 0 && true;

but is there a way to call a method (lodash,plain js or whatever) to just get this by design like method(arr,obj.age) //returns true ?

let arr = [
  {
    name: "john",
    age: 22
  },
  {
    name: "george",
    age: 55
  }
];

let obj = {
  name: "bill",
  age: 55
}

let find = arr.filter(i => i.age === obj.age);
let bool = find.length > 0 && true;

console.log(bool)

lodash object arrays javascript
2 Answers

You can use some. So basically it will return a boolean value if any of the object property in array matches the required value

let arr = [{
    name: "john",
    age: 22
  },
  {
    name: "george",
    age: 55
  }
];
let obj = {
  name: "bill",
  age: 55
}

const val = arr.some(item => item.age === obj.age);
console.log(val)

user_21813970

we can do it in two ways. we can use the some function and get the boolean directly or by find function, we can convert it to a boolean using !! operator.

let arr = [{
    name: "john",
    age: 22
  },
  {
    name: "george",
    age: 55
  }
];
let obj = {
  name: "bill",
  age: 55
}

const val1 = arr.some(item => item.age === obj.age);
console.log(val1)
const val2 = !!arr.find(item => item.age === obj.age);
console.log(val2)
user_66937830
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