Challenge Summary

Write a function called repeated word that finds the first word to occur more than once in a string Arguments: string Return: string

Whiteboard Process

Code Link:

hashmap-repeated-word

Approach & Efficiency

big o(n) space O(n) there is some builtin methods.

Solution

def repeated_word(string):
    hash = set()
    Mystring=string.replace(',', '')
    for word in Mystring.split():
        if word.lower() in hash:
            return word
        else:
            hash.add(word.lower())
    
    return 'None'