Searching an Array inside of an Object with another Array

Question

var movies = [{  
     title: "Mission Impossible 2",
     year: 2000,
     rating: 5,
     genre: ["Action"]
}, {
    title: "The Mummy",
    year: 1999,
    rating: 6,
    genre: ["Action", "Comedy"]
}]

var list = "Action"
console.log(movies.filter(function (movie) {
    return isInSet(list, movie);
}))

console.log(movies.filter(isInSet.bind(null, list)))

function isInSet(set, item) {
    return set.indexOf(item.genre) > -1;
}

This returns with mission impossible

Now what I would like to do is change list to

var list = ["Action", "Comedy"]

but when I do it returns with an empty array, Can anyone help explain how to search the array of genre with the array list; to return The Mummy?

Thanks in advance

Should it only return results containing all specified genres or atleast 1? — Manuel Otto
– Manuel Otto, Commented Feb 14, 2018 at 21:46
Possible duplicate of How to filter array with array condition — fubar
– fubar, Commented Feb 14, 2018 at 21:49

CRice · Accepted Answer · 2018-02-14 21:47:55Z

0

Assuming that you require every genre in the list to be included in the genres of a movie for a match, you can use a combination of the array .filter, .every, and .includes methods to get a list of matching items:

var movies = [{  
     title: "Mission Impossible 2",
     year: 2000,
     rating: 5,
     genre: ["Action"]
}, {
    title: "The Mummy",
    year: 1999,
    rating: 6,
    genre: ["Action", "Comedy"]
}]

var list = ["Action", "Comedy"]

console.log(movies.filter(movie => list.every(item => movie.genre.includes(item))))

answered Feb 14, 2018 at 21:47

CRice

32.6k5 gold badges63 silver badges75 bronze badges

Sign up to request clarification or add additional context in comments.

4 Comments

Broseph Over a year ago

Is there anyway to do this keeping the .bind? (for homework)

CRice Over a year ago

movies.filter(movie => list.every(isInSet.bind(null, list))) should work. Or do you need to get rid of all the arrow functions completely?

Broseph Over a year ago

Would probably be better to get rid of them all together but if that's asking too much don't worry about it, thank you btw

Broseph Over a year ago

Edit: I just tried using the .bind line and it seems to be giving me an empty array again

user9274775 · Accepted Answer · 2018-02-14 21:48:09Z

0

Compare all the items in the search criteria against the genre of each movie, and return true if all were found.

This can be done with .every().

var movies = [{  
     title: "Mission Impossible 2",
     year: 2000,
     rating: 5,
     genre: ["Action"]
}, {
    title: "The Mummy",
    year: 1999,
    rating: 6,
    genre: ["Action", "Comedy"]
}];

var data = ["Action", "Comedy"];

var result = movies.filter(m =>
    data.every(s => m.genre.includes(s))
);

console.log(result)

answered Feb 14, 2018 at 21:48

user9274775

Collectives™ on Stack Overflow

Searching an Array inside of an Object with another Array

2 Answers 2

4 Comments

Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

4 Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related