Wherefore art thou using forEach?

JavaScript
1

I completed the challenge alright.
However, as my understanding of it goes, we can’t use forEach to do the looping instead of for, cause forEach doesn’t return anything. Right?
Or can forEach be implemented here, and if so how?

 let final = collection.filter(obj => {
   for(let i=0; i<sourceArr.length; i++){
     if(!obj.hasOwnProperty(sourceArr[i]) || source[sourceArr[i]] !== obj[sourceArr[i]]){
       return false;
     }
   }
   return true;
 });

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

3

Am sorry, the curriculum anything about try, catch or throw. :frowning:

5

If you notice the “set-up” of the challenge, there’s a arr empty and ready to be filled with the values.
This actually incentives the usage of forEach, all you have to do is:

for each element that matches, add it into the array

Or in code:

function whatIsInAName(collection, source) {
  // What's in a name?
  var arr = [];
  // For each element that pass match push it into array
  collection.forEach(r => 
      matches(r, source) && arr.push(r)
    )
  // Only change code above this line
  return arr;
}

/**
* Compares two objects to determine if the first one contains equivalent property values to the second one.
* @param {object} obj
* @param {object} source
* @returns {boolean}
*/
const matches = (obj, source) =>
  Object.keys(source).every(key => obj.hasOwnProperty(key) && obj[key] === source[key]);
```