You will be given an array a and a value x. All you need to do is check whether the provided
array contains the value.
Array can contain numbers or strings. X can be either.
Return true if the array contains the value, false if not.
def check(arr,element)
arr.include?(element)
enddef positive_sum(arr)
arr.select{|x| x > 0}.reduce(0, :+)
end