[erlang-questions] best way to update a nested map

[Caragea Silviu]

Hello,

What's the best way to update a nested map ?

I tried something like :

M = #{ a => 1, c =>#{x => 1, y => 7}}.
M1 = M#{c}#{y => 4711}.

As described here:
http://www.erlang-factory.com/upload/presentations/779/WhereareweontheMap.pdf

But for some reason I get an error : syntax error before: '}'

Silviu
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