Ordinary base lists and vectors do not retain their attributes when subsetted or appended. This function appends items to a list while preserving the attributes of items in the list (but not of the list itself).

append_attr(x, y)

# S4 method for list,list
append_attr(x, y)

Arguments

x

A list of items with optional attributes.

y

See x.

Value

An updated list with attributes.

Details

Similar to updateList but does not require named lists.

Examples

# NOT RUN {
library(igraph) # igraph exports magrittr's pipe operator
tmp1 <- list("apple", "banana") %>% lapply(., `attributes<-`, list(type = "fruit"))
tmp2 <- list("carrot") %>% lapply(., `attributes<-`, list(type = "vegetable"))
append_attr(tmp1, tmp2)
rm(tmp1, tmp2)
# }