Be concise.
Be useful.
All contributions dictatorially edited by webmasters to match personal tastes.
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Please try to avoid dependencies to third-party libraries and frameworks.
final c = {...a, ...b};
c := make(M, len(a)+len(b))
for k, v := range a {
c[k] = v
}
for k, v := range b {
c[k] = v
}
let c = {...a, ...b}
%c = (%a, %b);
c = {**a, **b}
c = a | b
c = a.merge(b)