0th

Percentile

##### 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.

• tail_while
##### Examples
# NOT RUN {
pos <- function(x) x >= 0