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# Find the maximum | |
# def maximum(arr) | |
# arr.max | |
# end | |
def maximum(arr) | |
return nil if arr.empty? | |
max = - 1.0/0 #returns negative infinity | |
arr.each {|number| max = number if number > max} | |
max | |
end | |
# expect it to return 42 below | |
result = maximum([2, 42, 22, 02]) | |
puts "max of 2, 42, 22, 02 is: #{result}" | |
# expect it to return nil when empty array is passed in | |
result = maximum([]) | |
puts "max on empty set is: #{result.inspect}" | |
result = maximum([-23, 0, -3]) | |
puts "max of -23, 0, -3 is: #{result}" | |
result = maximum([6]) | |
puts "max of just 6 is: #{result}" | |
result = maximum([45, 12, 1, 78, 21, 32, 44, 90, 2]) | |
puts "max of 45, 12, 1, 78, 21, 32, 44, 90, 2 is: #{result}" |
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