Construct a lens into an attribute

The lens version of attr and attr<-

attr_l(attrib)

Arguments

attrib	A length one character vector indicating the attribute to lens into.

Examples

(x <- structure(1:10, important = "attribute"))
#>  [1]  1  2  3  4  5  6  7  8  9 10
#> attr(,"important")
#> [1] "attribute"
view(x, attr_l("important"))
#> [1] "attribute"
set(x, attr_l("important"), "feature")
#>  [1]  1  2  3  4  5  6  7  8  9 10
#> attr(,"important")
#> [1] "feature"