Question

IN ML(NOT PYTHON)

1. Write a function dupList of type 'a list -> 'a list whose output list is the same as the input list but with each element of the input list repeated twice in a row. For example, if the input is [1, 2, 3], the output list should produce [1, 1, 2, 2, 3, 3]. If the input list [], the output list should be [].

   • Do not use explicit recursion but use one of the fold functions. Do not write any additional functions, dupList should be the only function.

Answer 1

Code and output

code for copying

def dupList(a):
list1=[]
for i in a:
list1.append(i)
list1.append(i)

return list1
a=list(map(int,input().rstrip().split()))
print(dupList(a))

Code snippet

def dupList(a):
    list1=[]
    for i in a:
        list1.append(i)
        list1.append(i)
         
    return list1
a=list(map(int,input().rstrip().split()))
print(dupList(a))