Demonstrates using the Array.prototype.map method with a partially applied function.

map-with-partial-application.js

const partialCreateRanking = _.partial(createRanking, currentUser);

console.log(orderedHeroes.map(partialCreateRanking));
// Output: [
//           {'username':'George','rebel':'Luke Skywalker','index':0},
//           {'username':'George','rebel':'Han Solo','index':1},
//           {'username':'George','rebel':'Leia Organa','index':2},
//           {'username':'George','rebel':'Rey','index':3},
//           {'username':'George','rebel':'Finn','index':4},
//           {'username':'George','rebel':'Poe Dameron','index':5}
//         ]