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Introduction
The lapply() function
Other apply() functions
11. Converting inputs to lists
The split-apply-combine pattern
Summary

## Instruction

Cool! As it turns out, the input to lapply() and sapply() doesn't have to strictly be a list. Both lapply() and sapply() use the as.list() function to convert their argument to a list.

The as.list() function converts other R objects (like vectors or data frames) into a list. Let's see how this works.

## Exercise

We've put our sales into a data frame named sales_df. Use as.list() to convert the data frame to a list.