Operator list X54712

Statement

Write a function $operate(data, ops)$ that applies in turn the operators listed in $ops$ to the $data$ . The data is a list of $n>0$ integers. Then $ops$ is a string of length $n-1$ made up of the characters ’+’ and ’*’ standing respectively for sum and product. The result of the function is to be the outcome of the operations in left-to-right order both of $ops$ and of $data$ : the first operator is applied to the first two integers, the second operator is applied to the outcome and the third integer, and so on.

Sample session

>>> operate([25, 3], '*')
75
>>> operate([1, 1], '+')
2
>>> operate([2, 3, 4], '*+')
10
>>> operate([2, 3, 4], '+*')
20
>>> operate([333], '')
333
>>> operate([5, 5, 5, 5], '+++')
20
>>> operate([5, 5, 5, 5], '+*+')
55

Information

Author: José Luis Balcázar
Language: English
Official solutions: Python
User solutions: Python