Check if object in array contain all value in another object in array

Question

I've spent a couple hours to compare of two object in array, but i'm not find a way to achieve it

Let say i've these array called compareWith :

[{a:1},{b:2},{c:3}]

and this is an array to be compared and the expected result:

1. [{b:2}] true -> because {b:2} is in compareWith
2. [{c:3},{a:1}] true -> because {c:3} and {a:1} is in compareWith
3. [{a:1},{b:2}] true -> because {a:1} and {b:2} is in compareWith
4. [{a:1},{d:3}] false -> because {d:3} is not in compareWith even {a:1} is in compareWith

how can i achieve the above result using javascript function/ lodash?

EDIT:

just tried this but i want a boolean as a result:

import _ from 'lodash';

var a = [{a:1},{b:2},{c:3}]
var b = [{c:3},{a:1}]

let result = _.differenceWith(a, b, _.isEqual)
console.log(JSON.stringify(result)) //[{b:2}]

Answer 1

You can do it like this

function compareWith(originalArray, arrayToCompareWith){

   for(let obj of originalArray)
      if(!arrayToCompareWith.find((x)=>_.isEqual(x, obj)))
         return false;
   return true;

}

or just in one line using lodash as follows

 var main = [{a:1},{b:2},{c:3}], a1=[{b:2}], a2=[{c:3},{a:1}], a3=[{a:1},{b:2}], a4=[{a:1},{d:3}]; function compareWith(originalArray, arrayToCompareWith){ return _.differenceWith(arrayToCompareWith, originalArray, _.isEqual).length == 0; } console.log(compareWith(main, a1)); console.log(compareWith(main, a2)); console.log(compareWith(main, a3)); console.log(compareWith(main, a4));

 <script src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.19/lodash.min.js"></script>

Answer 2

You could use filter vanilla javascript

 main = [{a:1},{b:2},{c:3}] a1=[{b:2}] a3=[{c:3},{a:1}] a4=[{a:1},{b:2}] a5=[{a:1},{d:3}] function check(main,a){ res =main.filter(o=>a.some(e=>Object.keys(e)[0]==Object.keys(o)[0] && Object.values(e)[0]==Object.values(o)[0])) return res.length==a.length? true: false } console.log(check(main,a1)) console.log(check(main,a3)) console.log(check(main,a4)) console.log(check(main,a5))