R: Do every or some elements of a list satisfy a predicate?

every {purrr}

R Documentation

Do every or some elements of a list satisfy a predicate?

Do every or some elements of a list satisfy a predicate?

every(.x, .p, ...)

some(.x, .p, ...)

`.x`	A list or atomic vector.
`.p`	A single predicate function, a formula describing such a predicate function, or a logical vector of the same length as `.x`. Alternatively, if the elements of `.x` are themselves lists of objects, a string indicating the name of a logical element in the inner lists. Only those elements where `.p` evaluates to `TRUE` will be modified.
`...`	Additional arguments passed on to `.f`.

A logical vector of length 1.

x <- list(0, 1, TRUE)
x %>% every(identity)
x %>% some(identity)

y <- list(0:10, 5.5)
y %>% every(is.numeric)
y %>% every(is.integer)

[Package purrr version 0.2.5 Index]