`reduce()`

The reduce method reduces the collection to a single value, passing the result of each iteration into the subsequent iteration:

const collection = collect([1, 2, 3]);

const total = collection.reduce(function(carry, item) {
  return carry + item;
});

//=> 6

The value for carry on the first iteration is null; however, you may specify its initial value by passing a second argument to reduce:

const total = collection.reduce(function(carry, item) {
  return carry + item;
}, 4);

//=> 10

# reduce()