Intermediate Algorithm Scripting: Wherefore art thou/ Am i complicating this too much?

JavaScript
1

Tell us what’s happening:

hi everyone! i’m trying to apply what i learned with map and filter. I tried to put in the hints with the Object.keys and hasOwnProperty. Am i doing this wrong? Am i organizing this wrong? I’m getting an empty array!

Please help and explain what i’m doing wrong.

Your code so far


function whatIsInAName(collection, source) {
// What's in a name?
var arr = [];
// Only change code below this line
let sourceProps = Object.keys(source)
let filtered = collection.filter(function(obj) {
sourceProps.map(function(property){
  return obj.hasOwnProperty(property) == true && obj[property] == source[property] ? obj : [];    
  })

})

console.log(filtered)
// Only change code above this line
return arr;
}

whatIsInAName([{ first: "Romeo", last: "Montague" }, { first: "Mercutio", last: null }, { first: "Tybalt", last: "Capulet" }], { last: "Capulet" });

Your browser information:

User Agent is: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/79.0.3945.88 Safari/537.36.

Challenge: Wherefore art thou

Link to the challenge:
https://www.freecodecamp.org/learn/javascript-algorithms-and-data-structures/intermediate-algorithm-scripting/wherefore-art-thou

2

You are not returning a value for the filter callback function. This means during each iteration of the collection array, the value undefined gets returned by default which is fast, so no collection elements get filtered.

3