dict creates an ordinary (unordered) dictionary (a.k.a. hash).

dict(items = NULL, keys = NULL)

Arguments

items

a list of items

keys

a list of keys, use names(items) if NULL

Details

Following methods are exposed:

.$set(key, value)
.$get(key, default)
.$remove(key, silent = FALSE)
.$pop(key, default)
.$has(key)
.$keys()
.$values()
.$update(d)
.$clear()
.$size()
.$as_list()
.$print()
  • key: a scalar character, an atomic vector, an enviroment or a function

  • value: any R object, value of the item

  • default: optional, the default value of an item if the key is not found

  • d: a dict object

See also

Examples

d <- dict(list(apple = 5, orange = 10)) d$set("banana", 3) d$get("apple")
#> [1] 5
d$as_list() # unordered
#> $apple #> [1] 5 #> #> $orange #> [1] 10 #> #> $banana #> [1] 3 #>
d$pop("orange")
#> [1] 10
d$as_list() # "orange" is removed
#> $apple #> [1] 5 #> #> $banana #> [1] 3 #>
d$set("orange", 3)$set("pear", 7) # chain methods # vector indexing d$set(c(1L, 2L), 3)$set(LETTERS, 26) d$get(c(1L, 2L)) # 3
#> [1] 3
d$get(LETTERS) # 26
#> [1] 26
# object indexing e <- new.env() d$set(sum, 1)$set(e, 2) d$get(sum) # 1
#> [1] 1
d$get(e) # 2
#> [1] 2