Find element based on highest property value (Javascript)

find-element-by-highest-key-js.js

// Let's say you have a collection like this one:
// [{ name: 'Kristoffer', IQ: 120 }, { name: 'Steve', IQ: 88 }, { name: 'Jim', IQ: 142 }]
// And you want to get the person with the highest IQ. It's very simple. You can just do this:
const findElementByHighestKey = (collection, key) =>
collection.reduce((memo, el) => el[key] > memo[key] ? el : memo, { [key]: 0 });

// A version with somem more safety (empty array? No problem!)
const findElementByHighestKey = (collection, key) => 
// Make sure we have a collection with items and a key…
!collection || !key || collection.length < 1
// …if we don't: return an empty array.
? []
// Else just do the good stuff!
: collection.reduce((memo, el) => el[key] > memo[key] ? el : memo, { [key]: 0 });