Map

map-get($map, $key) Returns the value in a map associated with a given key.
map-merge($map1, $map2) Merges two maps together into a new map.
map-remove($map, $keys…) Returns a new map with keys removed.
map-keys($map) Returns a list of all keys in a map.
map-values($map) Returns a list of all values in a map.
map-has-key($map, $key) Returns whether a map has a value associated with a given key.
keywords($args) Returns the keywords passed to a function that takes variable arguments.
All map functions return a new map rather than updating the existing map in-place.
$a: (a:100px, 'b':200px, "c":300px);
div{
   margin: map-values(map-remove($a,'b'));
}

div {
  margin: 100px, 300px;
}