p_lgl()`, ...  | `modify()`  | `walk()`  |
| Two arguments         | `map2()` | `map2_lgl()`, ... | `modify2()` | `walk2()` |
| One argument + index  | `imap()` | `imap_lgl()`, ... | `imodify()` | `iwalk()` |
| N arguments           | `pmap()` | `pmap_lgl()`, ... | ---         | `pwalk()` |

.footnote[From [Adv R](https://adv-r.hadley.nz/functionals.html)]
---
class: middle, center

# `unnest()`

Unnests one or more list columns


```r
.Last.value %&gt;% unnest(train_set)
```

---

```r
simple_split %&gt;% 