Map Intersection

rascal-0.43.0

Synopsis

Intersection of two maps.

Syntax

Exp₁ & Exp₂

Types

Exp₁	Exp₂	Exp₁ & Exp₂
map[T₁1, T12]	set[T₂]	set[lub(T₁,T₂)]

Description

Returns the intersection of the two map values of Exp₁ and Exp₂, i.e., a map that contains the key/value pairs that occur in both maps.

Examples

rascal>("apple": 1, "pear": 2) & ("banana": 3, "apple": 1);
map[str, int]: ("apple":1)
rascal>("apple": 1, "pear": 2) & ("banana": 3, "apple": 4);
map[str, int]: ()