flow_fn: Implicit cache of a function and of the given call
In numeract/rflow: Flexible R Pipelines with Caching

Description Usage Arguments Details Value Examples

Implicit cache of a function and of the given call

1 2	flow_fn(..., fn = NULL, fn_id = NULL, flow_options = get_flow_options())

`...`	Named arguments to pass to `fn`.
`fn`	The function to apply to the data frame. It must accept a data frame as the first argument and a numeric index as the second argument.
`fn_id`	Optional id to uniquely identify the function. By default, rflow functions reuse the `cache` if the same function is given. The id allows the user to suppress console messages and to explicitly indicate whether to reuse the old `cache` or create a new one.
`flow_options`	List of options created using `get_flow_options`.

Arguments fn, fn_id and flow_options, when provided, must be named. Argument fn must be always provided.

The flow object.

fn <- function(x, y) { x + y + 2 }
flowed_fn <- flow_fn(2, 3, fn = fn)
collected_result <- flowed_fn %>%
    collect()
# usage with rflow pipes
fn2 <- function(x, y) { x * y }
collected_pipe_result <- flowed_fn %>%
    flow_fn(2, fn = fn2) %>%
    collect()