enumerate: Enumerate over a Vector

In kevinushey/Kmisc: Kevin Miscellaneous

Description

This function extends lapply to operate on functions taking two arguments – the first refers to each element within a vector, while the second refers to the current index.

Usage

enumerate(X, FUN, ...)

Arguments

X	A vector.
FUN	A function, taking two arguments.
...	Optional arguments to FUN.

Examples

data <- setNames( list(1, 2, 3), c('a', 'b', 'c') )
v <- replicate(10, rnorm(1E3), simplify=FALSE)
identical( lapply(v, sum), enumerate(v, sum) )
f <- function(x, i) i
enumerate(v, f)
enumerate(v, function(x, i) i)

kevinushey/Kmisc documentation built on May 20, 2019, 9:08 a.m.