Map Construction

The map doesn't contain duplicate keys. The insertion order (left-to-right) is preserved. In case of duplicate keys, the map contains the last value at the position of the first occurence of its key.

Syntax:
map( <key expression> -> <value expression> [, <key expression> -> <value expression>...] )
Example:
map(1 -> "a", 2 -> "b", 3 -> "c")