Don't know how to match asymmetrical objects

Tell us what’s happening:

My current try works when matching objects for 1 common element (like the second case in this challenge). But comparing, for example, [{a : 1, b : 2, c : 3}]with [{a : 1, c : 3}] throws an empty array, while a want to return the first array (because it has the elements of the second array). I’ve been reading hasOwnProperty and Object.keys in MDN…

Your code so far

function whatIsInAName(collection, source) {
// What's in a name?
var arr = [];
// Only change code below this line
arr = collection.slice().filter(object => object.hasOwnProperty(Object.keys(source)))

// Only change code above this line
return arr

console.log(whatIsInAName([{ "apple": 1, "bat": 2 }, { "apple": 1 }, { "apple": 1, "bat": 2, "cookie": 2 }], { "apple": 1, "cookie": 2 }));

Your browser information:

User Agent is: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/79.0.3945.130 Safari/537.36 OPR/66.0.3515.72.

Challenge: Wherefore art thou

Link to the challenge:

Object.keys() returns an array. hasOwnProperty() takes a string.

Thanks. I’m researching all the Object methods…

Thank you. I just thought that I need to use some method to get collection into arr (but I only need the =)