# 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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