Whereforartthou Question

JavaScript
1

Tell us what’s happening:
Can someone please tell me why my editor is displaying false when i’m testing if the object has this particular property?
Your code so far

    let newArray = [];
    let finalArray = [];

   for (const key in source) {
       
    // console.log(`${key}: ${source[key]}`);
    newArray[key] = source[key]    

   }

    // console.log(source)
    // console.log(collection)

    console.log(Object.keys(collection[2]))
    console.log(Object.keys(newArray))

    console.log(collection[2].hasOwnProperty('first','last'))
    console.log(collection[2].hasOwnProperty(Object.keys(newArray)))
    // console.log(source.hasOwnProperty('first'))


    return finalArray = [];

}

whatIsInAName([{ first: "Romeo", last: "Montague" }, { first: "Mercutio", last: null }, { first: "Tybalt", last: "Capulet" }],{first: 'Tybalt', last: "Capulet" }); /* should return [{ first: "Tybalt", last: "Capulet" }].

and in my console I get
[‘first’, ‘last’ ]
[ ‘first’, ‘last’ ]
true
false

Challenge: Wherefore art thou

Link to the challenge:

2

hasOwnProperty doesn’t take multiple arguments. Notice that when you change in the input all last properties to something else (ie. lasta), the check of collection[2].hasOwnProperty('first','last') will still return true.