foldn: Fold a generator N times with a binary function

In michaelquinn32/generators: Generators: Iterable functions

Description

foldn is the generator-equivalent of the function Reduce. It takes a generator, produces .n values and applies a binary function iteratively, returning a scalar.

Usage

foldn(.generator, .n, .FUN, ..., .start = 0)

Arguments

.generator	A function with the class generator
.n	The number of iterations to produce
.FUN	A binary fold function to reduce the generator to a single value
...	Additional arguments to .FUN
.start	The starting value for the reduction

Examples

# Sum from 1 to 10
counter <- generator(0, function (state) state + 1)
counter %>% copy %>% foldn(10, `+`)

michaelquinn32/generators documentation built on May 22, 2019, 9:52 p.m.