head_while

From purrr v0.2.2.2 by Lionel Henry

Find head/tail that all satisfies a predicate.

Find head/tail that all satisfies a predicate.

Usage

head_while(.x, .p, ...)
tail_while(.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.
...: Additional arguments passed on to .f.

Examples

# NOT RUN {
pos <- function(x) x >= 0
head_while(5:-5, pos)
tail_while(5:-5, negate(pos))

big <- function(x) x > 100
head_while(0:10, big)
tail_while(0:10, big)
# }

Documentation reproduced from package purrr, version 0.2.2.2, License: GPL-3 | file LICENSE

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