HList-class: Homogenous lists
In jrnold/r-checker: Data frames with column and table constraints

Description Usage Arguments Slots Extends Methods See Also Examples

An S4 subclass of list in which all elements of the list to be the same class. This is similar to the 'atomic lists' in R in that all elements of the vector must be the same class, but the HList supports arbitrary classes. NULL values are also valid.

1	HList(x, classtype = "ANY", ...)

`x`	`list`.
`classtype`	`character`
`...`	Data to include in the new object. Named arguments correspond to slots in the class definition.

.Data: Object of class list.
classtype: character. Required classtype for all elements in the list.
empty_names: logical. If FALSE, then no names can be NA or "".
unique_names: logical. If TRUE, then no duplicate names are allowed.

list: Directly.

[<-: signature(x = "HList")
[: signature(x = "HList")
[[<-: signature(x = "HList")
c: signature(x = "HList")
show: signature(object = "HList")

hlist_class,

# This is valid with lists
foo <- list(a=1:10, b=c(1, 5))
foo[["c"]] <- c("a", "z")
# # But would not be valid with a homogenous list
foo <- HList(list(a=1:10, b=c(1, 5)), "numeric")
try(foo[["c"]] <- c("a", "z"))
foo[["c"]] <- c(1, 4, 10)