Getting the union of two maps in go -

i have recursive function creates objects representing file paths (the keys paths , values info file). it's recursive it's meant handle files, if directory encountered, function recursively called on directory.

all being said, i'd equivalent of set union on 2 maps (i.e. "main" map updated values recursive call). there idiomatic way aside iterating on 1 map , assigning each key, value in same thing in other map?

that is: given a,b of type map [string] *someobject, , a , b populated, there way update a values in b?

there no built in way, nor method in standard packages such merge.

the idomatic way iterate:

for k, v := range b {     a[k] = v }