Add two maps in Groovy while summing up values for common keys

Question

I have two maps in Groovy [a: 1, b: 2] and [b:1, c:3] and would like to create from them a third map [a: 1, b: 3, c: 3]. Is there a Gr

Answer 1

The following example demonstrates adding two maps, to a third map m3:

Map m1 = [ a:1, b:2 ];
Map m2 = [ b:1, c:3 ];
Map m3 = [:];
m3 << m1
m3 << m2