Computers and Technology, 09.03.2021 02:00 gia2038
Create a class that generates the Fibonacci sequence of numbers (0, 1, 1, 2, 3, 5, 8) such that each number is the sum of the preceding two numbers. Your class should not print out any values, but should implement the iterator functions __iter__(), __next__() and StopIteration exception. (Your class needs to generate the values, not have them literally stored.) Write a test program to test your class by outputting the first 10 values of the Fibonacci sequence. Then reset and output the first 20 values.
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Suppose there is a relation r(a, b, c) with a b+-tree index with search keys (a, b).1. what is the worst-case cost of finding records satisfying 10 < a < 50 using this index, in terms of the number of records n1, retrieved and the height h of the tree? 2. what is the worst-case cost of finding records satisfying 10 < a < 50 and 5 < b < 10 using this index, in terms of the number of records n2 that satisfy this selection, as well as n1 and h defined above? 3. under what conditions on n1 and n2, would the index be an efficient way of finding records satisfying the condition from part (2)?
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Create a class that generates the Fibonacci sequence of numbers (0, 1, 1, 2, 3, 5, 8) such that each...
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