Map Functions

Map functions are used to create and manipulate mappings. Maps are different from structs in that the key does not have to be a string. The following table lists the functions that can be used with maps.

Note

Scroll to the right to see the example usage in the below table.

Function	Description	Example	Result
map(keys, values)	create a map	map([1, 2], ['a', 'b'])	{1=a, 2=b}
map_extract(map, key)	returning a list containing the value for given key or empty list if key is not found	map_extract(map([1, 2], ['a', 'b']), 1)	['a']
element_at(map, key)	alias of map_extract	element_at(map([1, 2], ['a', 'b']), 1)	['a']
cardinality(map)	returns the size of the map	cardinality(map([1, 2], ['a', 'b']))	2
map_keys(map)	returns all keys in the map	map_keys(map([1, 2], ['a', 'b']))	[1,2]
map_values(map)	returns all values in the map	map_values(map([1, 2], ['a', 'b']))	[a,b]