Ben Lau <xbenlau at gmail.com>, 15.06.2015 01:45: > var tmp = myMap.asdf; > tmp.name = "asdf" > myMap.asdf = tmp; Thanks for the fast reply! Unfortunately, this approach is very cumbersome for deeper hierarchies like: a.b.c.d[2].e.f = "g" I was hoping for a more convenient solution. Best regards Gerhard