mappers: Mappers

In Ilia-Kosenkov/primitiveR: R primitive tools

Description

Performs vctrs - compatibel mapping. Requries strongly typed input and output. By default returns vctrs::list_of. *_pt version performs conversion to the common ptype.

Usage

vmap(.x, .f, ..., .ptype = NULL)

vmap_pt(.x, .f, ..., .ptype = NULL)

vmap2(.x, .y, .f, ..., .ptype = NULL)

vmap2_pt(.x, .y, .f, ..., .ptype = NULL)

vmap_if(.x, .p, .f, ..., .else = NULL, .ptype = NULL)

vmap_at(.x, .at, .f, ..., .ptype = NULL)

vkeep(.x, .p, ..., .ptype = NULL)

vdiscard(.x, .p, ..., .ptype = NULL)

vimap(.x, .f, ..., .ptype = NULL)

vimap_pt(.x, .f, ..., .ptype = NULL)

Arguments

.x, .y	Vectors to iterate over.
.f	Mapper function.
...	Additional paramters passed to mappers
.ptype	Fallback ptype for type-stability of empty collections.
.p	Predicate function.
.else	Alternative mapper for vmap_if.
.at	Location to map at.

Value

Either list_of or vector of common ptype.

Ilia-Kosenkov/primitiveR documentation built on Jan. 20, 2021, 2:13 p.m.