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

Description

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

Usage

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

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

Arguments

.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.