map.size() Returns the number of entries in this map.

set.remove(value) If the set contains the specified value string, removes it and returns true. Otherwise, this

map.remove(key) If the map has an entry for the specified key string, removes the entry and returns true. Otherwise

map.each(function) Calls the specified function for each entry in this map, passing the entry’s value and key

map.set(key, value) Sets the value for the specified key string. If the map previously had

set.clear() Removes all values from this set.

set.empty() Returns true if and only if this set has zero values.

d3.values(object) Returns an array containing the property values of the specified object (an associative array). The order

map.has(key) Returns true if and only if this map has an entry for the specified key string. Note: the value

nest.object(array) Applies the nest operator to the specified array, returning a nested object. Each entry