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@dnguye2 dnguye2 commented Mar 30, 2020

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@CheezItMan CheezItMan left a comment

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Good work, you hit most of all the learning goals here. Well done.

Take a look at my comments and let me know if you have any questions.

Comment on lines +9 to +13
intersection_array = list2.map do |num|
num if lookup_hash[num]
end

return intersection_array.compact

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Use map if you want to do an operation on each element in the array. In this case you want to get only some of the elements of the array.

Suggested change
intersection_array = list2.map do |num|
num if lookup_hash[num]
end
return intersection_array.compact
intersection_array = list2.select do |num|
lookup_hash[num]
end
return intersection_array

@@ -1,3 +1,25 @@
def intersection(list1, list2)

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👍

Comment on lines +19 to +23
if number_of_odd > 1
return false
else
return true
end

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Suggested change
if number_of_odd > 1
return false
else
return true
end
return number_of_odd > 1

@@ -1,4 +1,21 @@

def permutations?(string1, string2)

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This would fail for something like heelo and hello. Instead of making lookup_hash[letter] = true instead count the number of times each letter appears.

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2 participants