Source code for tryalgo.majority

#!/usr/bin/env python3
# -*- coding: utf-8 -*-
jill-jenn vie et christoph durr - 2014-2019

# snip{
# pylint: disable=unused-variable
[docs]def majority(L): # snip} """Majority :param L: list of elements :returns: element that appears most in L, tie breaking with smallest element :complexity: :math:`O(nk)` in average, where n = len(L) and k = max(w for w in L) :math:`O(n^2k)` in worst case due to the use of a dictionary """ assert L # majority is undefined on the empty set # snip{ count = {} for word in L: if word in count: count[word] += 1 else: count[word] = 1 # Using min() like this gives the first word with # maximal count "for free" val_1st_max, arg_1st_max = min((-count[word], word) for word in count) return arg_1st_max
# snip}