Question

Given an array sort it according to frequency of elements in descending order

Answer 1

The Python Code is:

Method 1:

def Sorting(lst):

   lst.sort(key=len)

   return lst

lst = ["rohan", "amy", "sapna", "muhammad",  

      "aakash", "raunak", "chinmoy"]

Ist. reverse()

print(Sorting(lst))

Method 2:

import collections

def CountFrequency(arr):

   return collections.Counter(arr)

if __name__ == "__main__":

 

   arr = [1, 1, 1, 1, 2, 2, 2, 2, 3, 3, 4, 5, 5]

   freq = CountFrequency(arr)

for key, value in freq.iteritems():

       print(key, " -> ", value)

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