freeCodeCamp | Intermediate Algorithm Scripting: Wherefore art thou: Make a function that looks through an array of objects (first argument) and returns an array of all objects that have matching name and value pairs (second argument). Each name and value pair of the source object has to be present in the object from the collection if it is to b…

Wherefore-Art-Thou.js

function whatIsInAName(collection, source) {
  var arr = [];
  // Only change code below this line
  
  arr = collection.filter(object => {
    // function should return false for an object
    // if one of the source keys does not exist
    // or if an existing key's value does not match
    let sourceKeys = Object.keys(source);
    for (let i = 0; i < sourceKeys.length; i++) {
      if (object.hasOwnProperty(sourceKeys[i])) {
        if (object[sourceKeys[i]] != source[sourceKeys[i]]) {
          return false;
        }
      } else {
        return false;
      }
    }
    return true;
  });
  
  console.log(arr);
  // Only change code above this line
  return arr;
}

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