negate
From purrr v0.2.2.2
by Lionel Henry
Negate a predicate function.
Negate a predicate function.
Usage
negate(.p)Arguments
- .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.xare themselves lists of objects, a string indicating the name of a logical element in the inner lists. Only those elements where.pevaluates toTRUEwill be modified.
Value
A new predicate function.
Examples
# NOT RUN {
x <- transpose(list(x = 1:10, y = rbernoulli(10)))
x %>% keep("y") %>% length()
x %>% keep(negate("y")) %>% length()
# Same as
x %>% discard("y") %>% length()
# }
Community examples
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