ordered_dict: Ordered Dictionary

In collections: High Performance Container Data Types

Ordered Dictionary

Description

ordered_dict creates an ordered dictionary.

Usage

ordered_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)
.$popitem(last = TRUE)
.$has(key)
.$keys()
.$values()
.$update(d)
.$clear()
.$size()
.$as_list()
.$print()

• key: scalar character, environment or function

• value: any R object, value of the item

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

• d: an ordered_dict object

See Also

dict

Examples

d <- ordered_dict(list(apple = 5, orange = 10))
d$set("banana", 3)
d$get("apple")
d$as_list()  # the order the item is preserved
d$pop("orange")
d$as_list()  # "orange" is removed
d$set("orange", 3)$set("pear", 7)  # chain methods

collections documentation built on Jan. 6, 2023, 1:25 a.m.