20120904b

reverse a part of a list

Having a list, reverse a part of it. For instance, consider the list [1, 2, 9, 6, 5], and reverse its last three elements, which gives the list [1, 2, 5, 6, 9].

Solve the problem in a general way. Complete the following code snippet:

a = [1, 2, 9, 6, 5]
i = 2 # start reversing from this index position
j = 4 # reverse until this position (but this position is included)
... # magic happens
print a # [1, 2, 5, 6, 9]

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Page last modified on 2015 June 27, 16:32