list_of_animals.map((list)=>list.toLowerCase()).sort()
map returns a copy of the original array so you need to assign the result back to list_of_animals.
map
list_of_animals
list_of_animals = list_of_animals.map((list)=>list.toLowerCase()).sort()
Or you could compare lowercase strings in the sort method.
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mapreturns a copy of the original array so you need to assign the result back tolist_of_animals.Or you could compare lowercase strings in the sort method.