Base   ← map {"name" "price" "color"} {"Rocket Skates" 12.75 "yellow"}
Update ← map {"price" "color" "year"} {15.25 "red" 1974}
&pBase
&pUpdate
UnmapAndPop ← ◌: °map
GetAndMap   ← ˜map˜get

°⊂ UnmapAndPop Base UnmapAndPop Update
Base.
GetAndMap
.:◌:
Update
GetAndMap
&p"\n"
&p⊂
&p"\n"

&pBase
&pUpdate