experimentWithSome.js

    var firstArr = [{someProp: 1},{someProp: 2}];
    var secondArr = [{someProp: 2},{someProp: 4}];
    var isThereEquals = firstArr.some(function (item) {
        return secondArr.some(function (other) {
            return other.someProp === item.someProp;
        })
    });

    // this will be true because
    // in the both arrays there is
    // someProp 2
    console.log(isThereEquals);

    var firstArr = [{someProp: 1},{someProp: 2}];
    var secondArr = [{someProp: 3},{someProp: 4}];
    var isThereEquals = firstArr.some(function (item) {
        return secondArr.some(function (other) {
            return other.someProp === item.someProp;
        })
    });

    // this will be false because
    // in the both arrays there is
    // no equal someProp
    console.log(isThereEquals);