Merge elements in list based on given indices

Question

I want to merge element in the list based on given start and stop index of tuple (non-overlap for tuple). I\'ll leave the indices that don\'t mention as it is. This is my ex

Answer 1

For the fun of it, because I've been learning Haskell, a recursive solution:

def recursive(ls, merge):
    if merge == []:
        return ls
    else:
        x, xs = merge[0], merge[1:]
        return ls[:x[0]] + [''.join(ls[x[0]:x[1]])] + recursive(ls, xs)[x[1]:]

Only works if there are no overlapping intervals, however.