my-idlers/node_modules/collect.js/docs/api/reduce.md

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# `reduce()`
The reduce method reduces the collection to a single value, passing the result of each iteration into the subsequent iteration:
```js
const collection = collect([1, 2, 3]);
const total = collection.reduce((carry, item) => 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:
```js
const total = collection.reduce((carry, item) => carry + item, 4);
// 10
```
[View source on GitHub](https://github.com/ecrmnn/collect.js/blob/master/src/methods/reduce.js)